IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
128MX8, 64MX16 1Gb DDR3 SDRAM
MAY 2015
FEATURES
• Standard Voltage: VDD and VDDQ = 1.5V ± 0.075V
• Low Voltage (L): VDD and VDDQ = 1.35V + 0.1V, -0.067V
- Backward compatible to 1.5V
• High speed data transfer rates with system
frequency up to 933 MHz
• 8 internal banks for concurrent operation
• 8n-bit pre-fetch architecture
• Programmable CAS Latency
• Programmable Additive Latency: 0, CL-1,CL-2
• Programmable CAS WRITE latency (CWL) based
on tCK
• Programmable Burst Length: 4 and 8
• Programmable Burst Sequence: Sequential or
Interleave
• BL switch on the fly
• Auto Self Refresh(ASR)
• Self Refresh Temperature(SRT)
•
Refresh Interval:
7.8 us (8192 cycles/64 ms) Tc= -40°C to 85°C
3.9 us (8192 cycles/32 ms) Tc= 85°C to 105°C
•
•
•
•
•
•
•
•
•
OPTIONS
• Configuration:
128Mx8
64Mx16
• Package:
96-ball FBGA (9mm x 13mm) for x16
78-ball FBGA (8mm x 10.5mm) for x8
Partial Array Self Refresh
Asynchronous RESET pin
TDQS (Termination Data Strobe) supported (x8
only)
OCD (Off-Chip Driver Impedance Adjustment)
Dynamic ODT (On-Die Termination)
Driver strength : RZQ/7, RZQ/6 (RZQ = 240 Ω )
Write Leveling
Up to 200 MHz on DLL off mode
Operating temperature:
Commercial (TC = 0°C to +95°C)
Industrial (TC = -40°C to +95°C)
Automotive, A1 (TC = -40°C to +95°C)
Automotive, A2 (TC = -40°C to +105°C)
ADDRESS TABLE
Parameter
Row Addressing
Column Addressing
Bank Addressing
Page size
Auto Precharge Addressing
BL switch on the fly
128Mx8
A0-A13
A0-A9
BA0-2
1KB
A10/AP
A12/BC#
64Mx16
A0-A12
A0-A9
BA0-2
2KB
A10/AP
A12/BC#
SPEED BIN
Speed Option
187F
15G
15H
125J
107M
JEDEC Speed Grade
DDR3-1066F
DDR3-1333G
DDR3-1333H
DDR3-1600J
DDR3-1866
CL-nRCD-nRP
tRCD,tRP(min)
7-7-7
13.125
8-8-8
12.0
9-9-9
13.125
10-10-10
12.5
13-13-13
13.09
Units
tCK
ns
Note: Faster speed options may be backward compatible to slower speed options. Refer to timing specifications (8.3)
Copyright © 2015 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time
without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised
to obtain the latest version of this device specification before relying on any published information and before placing orders for products.
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the product
can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not authorized for use
in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that:
a.) the risk of injury or damage has been minimized;
b.) the user assume all such risks; and
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
1
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
1. DDR3 PACKAGE BALLOUT
1.1 DDR3 SDRAM package ballout 78-ball FBGA – x8
1
2
3
4
5
6
7
8
9
A
VSS
VDD
NC
NU/TDQS#
VSS
VDD
B
VSS
VSSQ
DQ0
DM/TDQS
VSSQ
VDDQ
C
VDDQ
DQ2
DQS
DQ1
DQ3
VSSQ
D
VSSQ
DQ6
DQS#
VDD
VSS
VSSQ
E
VREFDQ
VDDQ
DQ4
DQ7
DQ5
VDDQ
F
G
NC
1
VSS
RAS#
CK
VSS
NC
ODT
VDD
CAS#
CK#
VDD
CKE
H
NC
CS#
WE#
A10/AP
ZQ
NC
J
VSS
VDD
BA0
A3
BA2
A0
NC(A15)
A12/BC#
VREFCA
BA1
VSS
VDD
K
L
VSS
A5
A2
A1
A4
VSS
M
VDD
A7
A9
A11
A6
VDD
N
VSS
RESET#
A13
NC(A14)
A8
VSS
Note:
NC balls have no internal connection. NC(A14) and NC(A15) are one of NC pins and reserved for higher densities.
1.2 DDR3 SDRAM package ballout 96-ball FBGA – x16
A
1
2
3
7
8
9
VDDQ
DQU5
DQU7
4
5
6
DQU4
VDDQ
VSS
B
VSSQ
VDD
VSS
DQSU#
DQU6
VSSQ
C
VDDQ
DQU3
DQU1
DQSU
DQU2
VDDQ
D
VSSQ
VDDQ
DMU
DQU0
VSSQ
VDD
E
F
VSS
VSSQ
DQL0
DML
VSSQ
VDDQ
VDDQ
DQL2
DQSL
DQL1
DQL3
VSSQ
G
VSSQ
DQL6
DQSL#
VDD
VSS
VSSQ
H
J
VREFDQ
NC
VDDQ
VSS
DQL4
RAS#
DQL7
CK
DQL5
VSS
VDDQ
NC
K
ODT
VDD
CAS#
CK#
VDD
CKE
L
NC
CS#
WE#
A10/AP
ZQ
NC
M
VSS
BA0
BA2
NC(A15)
VREFCA
VSS
N
VDD
A3
A0
A12/BC#
BA1
VDD
A5
A2
A1
A4
VSS
P
VSS
R
VDD
A7
A9
A11
A6
VDD
T
VSS
RESET#
NC(A13)
NC(A14)
A8
VSS
Note:
NC balls have no internal connection. NC(A13), NC(A14) and NC(A15) are one of NC pins and reserved for higher densities.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
2
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
1.3 Pinout Description - JEDEC Standard
Symbol
Type
Function
CK, CK#
Input
CKE
Input
CS#
Input
ODT
Input
RAS#. CAS#.
WE#
DM, (DMU),
(DML)
Input
Clock: CK and CK# are differential clock inputs. All address and control input signals are sampled
on the crossing of the positive edge of CK and negative edge of CK#.
Clock Enable: CKE HIGH activates, and CKE Low deactivates, internal clock signals and device
input buffers and output drivers. Taking CKE Low provides Precharge Power-Down and SelfRefresh operation (all banks idle), or Active Power-Down (row Active in any bank). CKE is
asynchronous for Self-Refresh exit. After VREFCA and VREFDQ have become stable during the
power on and initialization sequence, they must be maintained during all operations (including
Self-Refresh). CKE must be maintained high throughout read and write accesses. Input buffers,
excluding CK, CK#, ODT and CKE, are disabled during power-down. Input buffers, excluding
CKE, are disabled during Self-Refresh.
Chip Select: All commands are masked when CS# is registered HIGH. CS# provides for external
Rank selection on systems with multiple Ranks. CS# is considered part of the command code.
On Die Termination: ODT (registered HIGH) enables termination resistance internal to the DDR3
SDRAM. When enabled, ODT is only applied to each DQ, DQSU, DQSU#, DQSL, DQSL#, DMU,
and DML signal. The ODT pin will be ignored if MR1 and MR2 are programmed to disable RTT.
Command Inputs: RAS#, CAS# and WE# (along with CS#) define the command being entered.
BA0 - BA2
Input
A0 - A13
Input
A10 / AP
Input
A12 / BC#
Input
RESET#
Input
DQ(DQL, DQU)
Input / Output
DQS,
DQS#, DQSU,
DQSU#, DQSL,
DQSL#
Input / Output
TDQS, TDQS#
Output
Input
NC
Input Data Mask: DM is an input mask signal for write data. Input data is masked when DM is
sampled HIGH coincident with that input data during a Write access. DM is sampled on both
edges of DQS. For x8 device, the function of DM or TDQS/TDQS# is enabled by Mode Register
A11 setting in MR1.
Bank Address Inputs: BA0 - BA2 define to which bank an Active, Read, Write, or Precharge
command is being applied. Bank address also determines which mode register is to be accessed
during a MRS cycle.
Address Inputs: Provide the row address for Active commands and the column address for Read/
Write commands to select one location out of the memory array in the respective bank. (A10/AP
and A12/BC# have additional functions; see below). The address inputs also provide the op-code
during Mode Register Set commands.
Auto-precharge: A10 is sampled during Read/Write commands to determine whether
Autoprecharge should be performed to the accessed bank after the Read/Write operation. (HIGH:
Autoprecharge; LOW: no Autoprecharge). A10 is sampled during a Precharge command to
determine whether the Precharge applies to one bank (A10 LOW) or all banks (A10 HIGH). If
only one bank is to be precharged, the bank is selected by bank addresses.
Burst Chop: A12 / BC# is sampled during Read and Write commands to determine if burst chop
(on-the-fly) will be performed. (HIGH, no burst chop; LOW: burst chopped). See command truth
table for details.
Active Low Asynchronous Reset: Reset is active when RESET# is LOW, and inactive when
RESET# is HIGH. RESET# must be HIGH during normal operation. RESET# is a CMOS rail- torail signal with DC high and low at 80% and 20% of VDD, i.e., 1.20V for DC high and 0.30V for
DC low.
Data Input/ Output: Bi-directional data bus.
Data Strobe: output with read data, input with write data. Edge-aligned with read data, centered
in write data. For the x16, DQSL corresponds to the data on DQL0-DQL7; DQSU corresponds to
the data on DQU0-DQU7. The data strobes DQS, DQSL, and DQSU are paired with differential
signals DQS#, DQSL#, and DQSU#, respectively, to provide differential pair signaling to the
system during reads and writes. DDR3 SDRAM supports differential data strobe only and does
not support single-ended.
Termination Data Strobe: TDQS/TDQS# is applicable for x8 DRAMs only. When enabled via
Mode Register A11 = 1 in MR1, the DRAM will enable the same termination resistance function
on TDQS/TDQS# that is applied to DQS/DQS#. When disabled via mode register A11 = 0 in
MR1, DM/TDQS will provide the data mask function and TDQS# is not used. x16 DRAMs must
disable the TDQS function via mode register A11 = 0 in MR1.
No Connect: No internal electrical connection is present.
VDDQ
Supply
DQ Power Supply: 1.5 V +/- 0.075 V for standard voltage or 1.35V +0.1V, -0.067V for low voltage
VSSQ
Supply
DQ Ground
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Rev. H
5/7/2015
3
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
VDD
Supply
Power Supply: 1.5 V +/- 0.075 V for standard voltage or 1.35V +0.1V, -0.067V for low voltage
VSS
Supply
Ground
VREFDQ
Supply
Reference voltage for DQ
VREFCA
Supply
Reference voltage for CA
ZQ
Supply
Reference Pin for ZQ
Note: Input only pins (BA0-BA2, A0-A13, RAS#, CAS#, WE#, CS#, CKE, ODT, and RESET#) do not supply termination.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
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IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
2. FUNCTION DESCRIPTION
2.1 Simplified State Diagram
Power
applied
Power
On
Reset
Procedure
MRS,MPR,
Write
Leveling
Initialization
Self
Refresh
SRE
ZQCL
From
Any state
RESET
ZQCL
ZQCS
ZQ
Calibration
SRX
REF
Idle
Refreshing
PDE
ACT
PDX
Active
Power
Down
Precharge
Power
Down
Activating
PDX
PDE
Write
Write
Bank
Active
Write A
Writing
Write
Read
Read A
Read
Write A
Read
Reading
Read A
Write A
Read A
PRE,PREA
Writing
PRE,PREA
PRE,PREA
Reading
Precharging
Automatic
Sequence
Command
Sequence
Abbreviation
Function
Abbreviation
Function
Abbreviation
Function
ACT
Active
Read
RD, RDS4, RDS8
PDE
Enter Power-down
PRE
Precharge
Read A
RDA, RDAS4, RDAS8
PDX
Exit Power-down
PREA
Precharge All
Write
WR, WRS4, WRS8
SRE
Self-Refresh entry
MRS
Mode Register Set
Write A
WRA, WRAS4, WRAS8
SRX
REF
Refresh
Start RESET Procedure
MPR
Self-Refresh exit
Multi-Purpose Register
ZQCL
ZQ Calibration Long
RESET
ZQCS
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Rev. H
5/7/2015
ZQ Calibration Short
5
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
2.2 RESET and Initialization Procedure
2.2.1 Power-up Initialization Sequence
The following sequence is required for POWER UP and Initialization.
1. Apply power (RESET# is recommended to be maintained below 0.2 x VDD; all other inputs may be undefined).
RESET# needs to be maintained for minimum 200 us with stable power. CKE is pulled “Low” anytime before
RESET# being de-asserted (min. time 10 ns). The power voltage ramp time between 300mV to VDD(min) must be
no greater than 200 ms; and during the ramp, VDD > VDDQ and (VDD - VDDQ) < 0.3 volts.
•
•
•
VDD and VDDQ are driven from a single power converter output, AND
The voltage levels on all pins other than VDD, VDDQ, VSS, VSSQ must be less than or equal to VDDQ and VDD
on one side and must be larger than or equal to VSSQ and VSS on the other side. In addition, VTT is limited to
0.95 V max once power ramp is finished, AND
Vref tracks VDDQ/2.
OR
•
•
•
Apply VDD without any slope reversal before or at the same time as VDDQ.
Apply VDDQ without any slope reversal before or at the same time as VTT & Vref.
The voltage levels on all pins other than VDD, VDDQ, VSS, VSSQ must be less than or equal to VDDQ and VDD
on one side and must be larger than or equal to VSSQ and VSS on the other side.
2. After RESET# is de-asserted, wait for another 500 us until CKE becomes active. During this time, the DRAM will
start internal state initialization; this will be done independently of external clocks.
3. Clocks (CK, CK#) need to be started and stabilized for at least 10 ns or 5 tCK (which is larger) before CKE goes
active. Since CKE is a synchronous signal, the corresponding set up time to clock (tIS) must be met. Also, a NOP or
Deselect command must be registered (with tIS set up time to clock) before CKE goes active. Once the CKE is
registered “High” after Reset, CKE needs to be continuously registered “High” until the initialization sequence is
finished, including expiration of tDLLK and tZQinit.
4. The DDR3 SDRAM keeps its on-die termination in high-impedance state as long as RESET# is asserted. Further,
the SDRAM keeps its on-die termination in high impedance state after RESET# deassertion until CKE is registered
HIGH. The ODT input signal may be in undefined state until tIS before CKE is registered HIGH. When CKE is
registered HIGH, the ODT input signal may be statically held at either LOW or HIGH. If RTT_NOM is to be enabled
in MR1, the ODT input signal must be statically held LOW. In all cases, the ODT input signal remains static until the
power up initialization sequence is finished, including the expiration of tDLLK and tZQinit.
5. After CKE is being registered high, wait minimum of Reset CKE Exit time, tXPR, before issuing the first MRS
command to load mode register. (tXPR=max (tXS ; 5 x tCK)
6. Issue MRS Command to load MR2 with all application settings. (To issue MRS command for MR2, provide “Low” to
BA0 and BA2, “High” to BA1.)
7. Issue MRS Command to load MR3 with all application settings. (To issue MRS command for MR3, provide “Low” to
BA2, “High” to BA0 and BA1.)
8. Issue MRS Command to load MR1 with all application settings and DLL enabled. (To issue "DLL Enable" command,
provide "Low" to A0, "High" to BA0 and "Low" to BA1 – BA2).
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
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IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9. Issue MRS Command to load MR0 with all application settings and “DLL reset”. (To issue DLL reset command,
provide "High" to A8 and "Low" to BA0-2).
10. Issue ZQCL command to starting ZQ calibration.
11. Wait for both tDLLK and tZQinit completed.
12. The DDR3 SDRAM is now ready for normal operation.
Ta
CK,CK#
Tb
((
() ()
))
Tc
Td
((
() ()
))
Te
Tf
Tg
Th
Ti
Tj
Tk
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
() ()
))
((
() ()
))
((
() ()
))
((
)( ()
))
((
() ()
))
((
)( ()
))
((
() ()
))
Valid
((
() ()
))
Valid
((
() ()
))
Valid
tCKSRX
VDD,VDDQ
RESET#
((
))
((
))
T=200µS
T=500µS
((
((
))
))
tIS
Tmin=10nS
CKE
((
)( ()
))
tDLLK
tMRD
tXPR
tMRD
tMRD
tMOD
tZQinit
tIS
CMMAND
((
() ()
))
((
() ()
))
BA
((
() ()
))
((
() ()
))
ODT
((
() ()
))
((
() ()
))
RTT
((
))
((
))
1)
((
() ()
))
MRD
((
() ()
))
MRD
((
() ()
))
MRD
((
() ()
))
MRD
((
() ()
))
((
() ()
))
MR2
((
() ()
))
MR3
((
() ()
))
MR1
((
() ()
))
MR0
((
() ()
))
ZQCL
((
() ()
))
1)
((
() ()
))
tIS
tIS
((
() ()
Static
))
LOW in case RTT_Nom is enabled at time Tg, otherwise static
((
))
((
))
Note1. From time point “Td” until “Tk” NOP or DES commands must be
applied between MRS and ZQCL commands.
((
))
((
))
((
() ()
HIGH
))
((
))
((
))
Time
Break
Figure2.1.1 Reset and Initialization Sequence at Power-on Ramping
((
))
or LOW
((
() ()
))
Valid
((
))
DON’T
CARE
2.2.2 Reset Initialization with Stable Power
The following sequence is required for RESET at no power interruption initialization.
1. Asserted RESET below 0.2 * VDD anytime when reset is needed (all other inputs may be undefined). RESET needs
to be maintained for minimum 100 ns. CKE is pulled “LOW” before RESET being de-asserted (min. time 10 ns).
2. Follow Power-up Initialization Sequence steps 2 to 11.
3. The Reset sequence is now completed; DDR3 SDRAM is ready for normal operation.
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IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Ta
CK,CK#
Tb
((
() ()
))
Tc
Td
Te
((
() ()
))
Tf
Tg
Th
Ti
Tj
Tk
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
tCKSRX
VDD,VDDQ
RESET#
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
))
T=100nS
T=500µS
((
((
))
((
))
((
))
((
))
((
))
((
))
((
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
((
() ()
))
Valid
((
() ()
))
Valid
((
() ()
))
Valid
((
))
))
tIS
Tmin=10nS
CKE
((
() ()
))
tDLLK
tMRD
tXPR
tMRD
tMRD
tMOD
tZQinit
tIS
CMMAND
((
() ()
))
((
() ()
))
BA
((
)( ()
))
((
() ()
))
ODT
((
() ()
))
((
() ()
))
RTT
((
))
((
))
1)
((
() ()
))
MRD
((
() ()
))
MRD
((
() ()
))
MRD
((
() ()
))
MRD
((
() ()
))
((
() ()
))
MR2
((
() ()
))
MR3
((
() ()
))
MR1
((
() ()
))
MR0
((
() ()
))
ZQCL
((
() ()
))
1)
((
() ()
))
tIS
tIS
((
() ()
Static
))
LOW in case RTT_Nom is enabled at time Tg, otherwise static
((
))
((
))
Note1. From time point “Td” until “Tk” NOP or DES commands must be
applied between MRS and ZQCL commands.
((
))
((
))
((
() ()
HIGH
))
((
))
((
))
((
))
Time
Break
or LOW
((
() ()
))
Valid
((
))
DON’T
CARE
Figure2.1.2 Reset Procedure at Power Stable Condition
2.3 Register Definition
2.3.1 Programming the Mode Registers
For application flexibility, various functions, features, and modes are programmable in four Mode Registers, provided by
the DDR3 SDRAM, as user defined variables and they must be programmed via a Mode Register Set (MRS) command.
As the default values of the Mode Registers (MR#) are not defined, contents of Mode Registers must be fully initialized
and/or re-initialized, i.e. written, after power up and/or reset for proper operation. Also the contents of the Mode Registers
can be altered by re-executing the MRS command during normal operation. When programming the mode registers, even
if the user chooses to modify only a sub-set of the MRS fields, all address fields within the accessed mode register must
be redefined when the MRS command is issued. MRS command and DLL Reset do not affect array contents, which
means these commands can be executed any time after power-up without affecting the array contents The mode register
set command cycle time, tMRD is required to complete the write operation to the mode register and is the minimum time
required between two MRS commands shown as below.
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IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
CK
Command
Valid
Valid
Valid
MRS
NOP/
DEC
NOP/
DEC
MRS
NOP/
DEC
NOP/
DEC
Valid
Valid
Address
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
CKE
Old Settings
Settings
New Settings
tMRD
tMRD
RTT_Nom ENABLED prior and/or after MRS command
ODT
ODT
Valid
Valid
ODTLoff + 1
Valid
RTT_Nom DISABLED prior and after MRS command
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
((
))
Valid
DON’T
CARE
Time
Break
Figure2.3.1a tMRD Timing
The MRS command to Non-MRS command delay, tMOD, is require for the DRAM to update the features except DLL
reset, and is the minimum time required from an MRS command to a non-MRS command excluding NOP and DES shown
as the following figure.
CK#
CK
Command
Valid
Valid
Valid
MRS
NOP/
DEC
NOP/
DEC
NOP/
DEC
NOP/
DEC
NOP/
DEC
Valid
Valid
Address
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
CKE
Old Settings
Settings
New Settings
tMOD
RTT_Nom ENABLED prior and/or after MRS command
ODT
ODT
Valid
Valid
ODTLoff + 1
RTT_Nom DISABLED prior and after MRS command
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
Valid
((
))
Time
Break
Valid
DON’T
CARE
Figure 2.3.1b tMOD Timing
The mode register contents can be changed using the same command and timing requirements during normal operation
as long as the DRAM is in idle state, i.e., all banks are in the precharged state with tRP satisfied, all data bursts are
completed and CKE is high prior to writing into the mode register. If the RTT_NOM Feature is enabled in the Mode
Register prior and/or after an MRS Command, the ODT Signal must continuously be registered LOW ensuring RTT is in
an off State prior to the MRS command. The ODT Signal maybe registered high after tMOD has expired. If the RTT_NOM
Feature is disabled in the Mode Register prior and after an MRS command, the ODT Signal can be registered either LOW
or HIGH before, during and after the MRS command. The mode registers are divided into various fields depending on the
functionality and/or modes.
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2.3.2 Mode Register MR0
The mode register MR0 stores the data for controlling various operating modes of DDR3 SDRAM. It controls burst length,
read burst type, CAS latency, test mode, DLL reset, WR and DLL control for precharge Power-Down, which include
vendor specific options to make DDR3 SDRAM useful for various applications. The mode register is written by asserting
low on CS#, RAS#, CAS#, WE#, BA0, BA1, and BA2, while controlling the states of address pins according to the
following figure.
BA2 BA1 BA0
0
0
0
A8
0
1
A12
0
1
BA1 BA0
0
0
0
1
1
0
1
1
A13
0* 1
A12
PPD
DLL Reset
No
Yes
DLL Control for
Precharge PD
Slow exit (DLL off)
Fast exit (DLL on)
MR Select
MR0
MR1
MR2
MR3
A11
A7
0
1
A10
WR
A9
mode
Nomal
Test
A8
DLL
A7
TM
A6
A5
A4
CAS Latency
A3
0
1
Read Burst Type
Nibble Sequential
Interleave
Write recovery for autoprecharge
A11 A10 A9
WR(cycles)
0
0
0
16 *2
0
0
1
5 *2
0
1
0
6 *2
0
1
1
7 *2
1
0
0
8 *2
1
0
1
10 *2
1
1
0
12 *2
1
1
1
14 *2
A3
RBT
A2
CL
A1
A0
A1
0
0
1
1
A0
0
1
0
1
BL
8 (Fixed)
BC4 or 8 (on the fly)
BC4 (Fixed)
Reserved
BL
Address Field
Mode Register 0
A6
0
0
0
0
1
1
1
1
A5
0
0
1
1
0
0
1
1
A4
0
1
0
1
0
1
0
1
A2
0
0
0
0
0
0
0
0
CAS Latency
Reserved
5
6
7
8
9
10
11
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
1
1
1
1
1
1
12
13
14
15
16
Reserved
1
1
0
1
Reserved
1
1
1
1
Reserved
1. A13 must be programmed to 0 during MRS.
2. WR (write recovery for autoprecharge)min in clock cycles is calculated by dividing tWR(in ns) by tCK(in ns) and rounding up to the next integer:
WRmin[cycles] = Roundup(tWR[ns] / tCK[ns]). The WR value in the mode register must be programmed to be equal or larger than WRmin. The
programmed WR value is used with tRP to determine tDAL.
3. The table only shows the encodings for a given Cas Latency. For actual supported Cas Latency, please refer to speedbin tables for each
frequency
4. The table only shows the encodings for Write Recovery. For actual Write recovery timing, please refer to AC timing table.
Figure 2.3.2 — MR0 Definition
2.3.2.1 Burst Length, Type and Order
Accesses within a given burst may be programmed to sequential or interleaved order. The burst type is selected via bit A3
as shown in Figure 2.3.2. The ordering of accesses within a burst is determined by the burst length, burst type, and the
starting column address as shown in Table below. The burst length is defined by bits A0-A1. Burst length options include
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fixed BC4, fixed BL8, and ‘on the fly’ which allows BC4 or BL8 to be selected coincident with the registration of a Read or
Write command via A12/BC#.
Burst
Length
4
Chop
READ/
WRITE
READ
WRITE
8
READ
WRITE
Starting
Column
ADDRESS
(A2,A1,A0)
0
1
10
11
100
101
110
111
0,V,V
1,V,V
0
1
10
11
100
101
110
111
V,V,V
burst type = Sequential
(decimal)
A3 = 0
burst type = Interleaved
(decimal)
A3 = 1
Notes
0,1,2,3,T,T,T,T
1,2,3,0,T,T,T,T
2,3,0,1,T,T,T,T
3,0,1,2,T,T,T,T
4,5,6,7,T,T,T,T
5,6,7,4,T,T,T,T
6,7,4,5,T,T,T,T
7,4,5,6,T,T,T,T
0,1,2,3,X,X,X,X
4,5,6,7,X,X,X,X
0,1,2,3,4,5,6,7
1,2,3,0,5,6,7,4
2,3,0,1,6,7,4,5
3,0,1,2,7,4,5,6
4,5,6,7,0,1,2,3
5,6,7,4,1,2,3,0
6,7,4,5,2,3,0,1
7,4,5,6,3,0,1,2
0,1,2,3,4,5,6,7
0,1,2,3,T,T,T,T
1,0,3,2,T,T,T,T
2,3,0,1,T,T,T,T
3,2,1,0,T,T,T,T
4,5,6,7,T,T,T,T
5,4,7,6,T,T,T,T
6,7,4,5,T,T,T,T
7,6,5,4,T,T,T,T
0,1,2,3,X,X,X,X
4,5,6,7,X,X,X,X
0,1,2,3,4,5,6,7
1,0,3,2,5,4,7,6
2,3,0,1,6,7,4,5
3,2,1,0,7,6,5,4
4,5,6,7,0,1,2,3
5,4,7,6,1,0,3,2
6,7,4,5,2,3,0,1
7,6,5,4,3,2,1,0
0,1,2,3,4,5,6,7
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 3
1, 2, 4, 5
1, 2, 4, 5
2
2
2
2
2
2
2
2
2, 4
Notes:
1. In case of burst length being fixed to 4 by MR0 setting, the internal write operation starts two clock cycles earlier than for the BL8 mode. This means
that the starting point for tWR and tWTR will be pulled in by two clocks. In case of burst length being selected on-the-fly via A12/BC#, the internal
write operation starts at the same point in time like a burst of 8 write operation. This means that during on-the-fly control, the starting point for tWR
and tWTR will not be pulled in by two clocks.
2. 0...7 bit number is value of CA[2:0] that causes this bit to be the first read during a burst.
3. T: Output driver for data and strobes are in high impedance.
4. V: a valid logic level (0 or 1), but respective buffer input ignores level on input pins.
5. X: Don’t Care.
2.3.2.2 CAS Latency
The CAS Latency is defined by MR0 (bits A9-A11) as shown in Figure 2.3.2. CAS Latency is the delay, in clock cycles,
between the internal Read command and the availability of the first bit of output data. DDR3 SDRAM does not support
any half-clock latencies. The overall Read Latency (RL) is defined as Additive Latency (AL) + CAS Latency (CL); RL = AL
+ CL. For more information on the supported CL and AL settings based on the operating clock frequency, refer to
“Standard Speed Bins”.
2.3.2.3 Test Mode
The normal operating mode is selected by MR0 (bit A7 = 0) and all other bits set to the desired values shown in Figure
2.3.2. Programming bit A7 to a ‘1’ places the DDR3 SDRAM into a test mode that is only used by the DRAM Manufacturer
and should NOT be used. No operations or functionality is specified if A7 = 1.
2.3.2.4 DLL Reset
The DLL Reset bit is self-clearing, meaning that it returns back to the value of ‘0’ after the DLL reset function has been
issued. Once the DLL is enabled, a subsequent DLL Reset should be applied. Any time that the DLL reset function is
used, tDLLK must be met before any functions that require the DLL can be used (i.e., Read commands or ODT
synchronous operations).
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2.3.2.5 Write Recovery
The programmed WR value MR0 (bits A9, A10, and A11) is used for the auto precharge feature along with tRP to
determine tDAL. WR (write recovery for auto-precharge) min in clock cycles is calculated by dividing tWR (in ns) by tCK
(in ns) and rounding up to the next integer: WRmin[cycles] = Roundup(tWR[ns]/tCK[ns]). The WR must be programmed to
be equal to or larger than tWR(min).
2.3.2.6 Precharge PD DLL
MR0 (bit A12) is used to select the DLL usage during precharge power-down mode. When MR0 (A12 = 0), or ‘slow-exit’,
the DLL is frozen after entering precharge power-down (for potential power savings) and upon exit requires tXPDLL to be
met prior to the next valid command. When MR0 (A12 = 1), or ‘fast-exit’, the DLL is maintained after entering precharge
power-down and upon exiting power-down requires tXP to be met prior to the next valid command.
2.3.3 Mode Register MR1
The Mode Register MR1 stores the data for enabling or disabling the DLL, output driver strength, Rtt_Nom impedance,
additive latency, Write leveling enable, TDQS enable and Qoff. The Mode Register 1 is written by asserting low on CS#,
RAS#, CAS#, WE#, high on BA0 and low on BA1 and BA2, while controlling the states of address pins according to
Figure 2.3.3.
BA2 BA1 BA0
0
0
1
A11
0
1
A13
0* 1
TDQS enable
Disabled
Enabled
A4
0
0
1
1
A12
0
1
A12 A11 A10
Qoff TDQS 0* 1
A9
Rtt
A7
0
1
Write leveling enable
Disabled
Enabled
A3
0
1
0
1
Additive Latency
0 (AL disabled)
CL-1
CL-2
Reserved
A7
Level
A6
Rtt
A5
D.I.C
A9
0
0
0
0
1
1
1
1
A6
0
0
1
1
0
0
1
1
A2
0
1
0
1
0
1
0
1
A4
A3
AL
A2
Rtt
Rtt_Nom *3
ODT disabled
RZQ/4
RZQ/2
RZQ/6
RZQ/12 *4
RZQ/8*4
Reserved
Reserved
A1
A0 Address Field
D.I.C DLL Mode Register 1
A0
0
1
DLL Enable
Enable
Disable
Note: RZQ = 240 Ω
*3:In Write leveling Mode (MR1[bit7] = 1) with
MR1[bit12]=1, all RTT_Nom settings are allowed; in
Write Leveling Mode (MR1[bit7] = 1) with
MR1[bit12]=0, only RTT_Nom settings of RZQ/2,
RZQ/4 and RZQ/6 are allowed.
*4:If RTT_Nom is used during Writes, only the
values RZQ/2, RZQ/4 and RZQ/6 are allowed.
Qoff *2
Output buffer enabled
Output buffer disabled *2
*2: Outputs disabled - DQs, DQSs, DQS#s.
BA1 BA0
0
0
0
1
1
0
1
1
A8
0* 1
MR Select
MR0
MR1
MR2
MR3
A5
0
0
1
A1
0
1
0
1
1
Output Driver Impedance Control
RZQ/6
RZQ/7
RZQ/TBD
RZQ/TBD
* 1 : A8, A10, and A13 must be programmed to 0 during MRS.
* TDQS must be disabled for x16 option.
Figure 2.3.3 MR1 Definition
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2.3.3.1 DLL Enable/Disable
The DLL must be enabled for normal operation. DLL enable is required during power up initialization, and upon returning
to normal operation after having the DLL disabled. During normal operation (DLL-on) with MR1 (A0 = 0), the DLL is
automatically disabled when entering Self-Refresh operation and is automatically re-enabled upon exit of Self-Refresh
operation. Any time the DLL is enabled and subsequently reset, tDLLK clock cycles must occur before a Read or
synchronous ODT command can be issued to allow time for the internal clock to be synchronized with the external clock.
Failing to wait for synchronization to occur may result in a violation of the tDQSCK, tAON or tAOF parameters. During
tDLLK, CKE must continuously be registered high. DDR3 SDRAM does not require DLL for any Write operation, except
when RTT_WR is enabled and the DLL is required for proper ODT operation. For more detailed information on DLL
Disable operation refer to “DLL-off Mode”.
The direct ODT feature is not supported during DLL-off mode. The on-die termination resistors must be disabled by
continuously registering the ODT pin low and/or by programming the RTT_Nom bits MR1{A9,A6,A2} to {0,0,0} via a mode
register set command during DLL-off mode.
The dynamic ODT feature is not supported at DLL-off mode. User must use MRS command to set Rtt_WR, MR2 {A10, A9}
= {0,0}, to disable Dynamic ODT externally.
2.3.3.2 Output Driver Impedance Control
The output driver impedance of the DDR3 SDRAM device is selected by MR1 (bits A1 and A5) as shown in Figure 2.3.3.
2.3.3.3 ODT Rtt Values
DDR3 SDRAM is capable of providing two different termination values (Rtt_Nom and Rtt_WR). The nominal termination
value Rtt_Nom is programmed in MR1. A separate value (Rtt_WR) may be programmed in MR2 to enable a unique RTT
value when ODT is enabled during writes. The Rtt_WR value can be applied during writes even when Rtt_Nom is
disabled.
2.3.3.4 Additive Latency (AL)
Additive Latency (AL) operation is supported to make command and data bus efficient for sustainable bandwidths in
DDR3 SDRAM. In this operation, the DDR3 SDRAM allows a read or write command (either with or without autoprecharge) to be issued immediately after the active command. The command is held for the time of the Additive Latency
(AL) before it is issued inside the device. The Read Latency (RL) is controlled by the sum of the AL and CAS Latency (CL)
register settings. Write Latency (WL) is controlled by the sum of the AL and CAS Write Latency (CWL) register settings. A
summary of the AL register options are shown in Table below.
A4
0
0
1
1
A3
0
1
0
1
Additive Latency (AL) Settings
0 (AL Disabled)
CL - 1
CL - 2
Reserved
NOTE: AL has a value of CL - 1 or CL - 2 as per the CL values programmed in the MR0 register.
2.3.3.5 Write leveling
For better signal integrity, DDR3 memory module adopted fly-by topology for the commands, addresses, control signals,
and clocks. The fly-by topology has the benefit of reducing the number of stubs and their length, but it also causes flight
time skew between clock and strobe at every DRAM on the DIMM. This makes it difficult for the Controller to maintain
tDQSS, tDSS, and tDSH specification. Therefore, the DDR3 SDRAM supports a ‘write leveling’ feature to allow the
controller to compensate for skew.
2.3.3.6 Output Disable
The DDR3 SDRAM outputs may be enabled/disabled by MR1 (bit A12) as shown in Figure 2.3.3. When this feature is
enabled (A12 = 1), all output pins (DQs, DQS, DQS#, etc.) are disconnected from the device, thus removing any loading
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of the output drivers. This feature may be useful when measuring module power, for example. For normal operation, A12
should be set to ‘0’.
2.3.3.7 TDQS, TDQS#
TDQS (Termination Data Strobe) is a feature of X8 DDR3 SDRAM that provides additional termination resistance outputs
that may be useful in some system configurations. The TDQS function is available in X8 DDR3 SDRAM only and must be
disabled via the mode register A11=0 in MR1 for X16 configuration.
2.3.4 Mode Register MR2
The Mode Register MR2 stores the data for controlling refresh related features, Rtt_WR impedance, and CAS write
latency. The Mode Register 2 is written by asserting low on CS#, RAS#, CAS#, WE#, high on BA1 and low on BA0 and
BA2, while controlling the states of address pins according to the below.
BA2
0
BA1
1
A7
0
1
BA0
0
A13
A12
A11
0* 1
A10 A9
Rtt_WR
Self-Refresh Temperature (SRT) Range
Normal operating temperature range
Extended operating temperature range
A6
0
1
Auto Self-Refresh (ASR)
Manual SR Reference (SRT)
ASR enable
A10
0
0
1
A9
0
1
0
1
1
BA1 BA0
0
0
0
1
1
0
1
1
Rtt_WR *2
Dynamic ODT off (Write does not affect Rtt value)
RZQ/4
RZQ/2
Reserved
MR Select
MR0
MR1
MR2
MR3
A8
0* 1
A7
SRT
A6
ASR
A2
0
0
0
0
1
1
1
1
A1
0
0
1
1
0
0
1
1
A0
0
1
0
1
0
1
0
1
A5
A4
CWL
A3
A2
A1
A0
PASR
Address Field
Mode Register 2
Partial Array Self-Refresh (Optional)
Full Array
HalfArray (BA[2:0]=000,001,010, &011)
Quarter Array (BA[2:0]=000, & 001)
1/8th Array (BA[2:0] = 000)
3/4 Array (BA[2:0] = 010,011,100,101,110, & 111)
HalfArray (BA[2:0] = 100, 101, 110, &111)
Quarter Array (BA[2:0]=110, &111)
1/8th Array (BA[2:0]=111)
A5
0
0
0
A4
0
0
1
A3
0
1
0
CAS write Latency (CWL)
5 (tCK(avg) ≥ 2.5 ns)
6 (2.5 ns > tCK(avg) ≥ 1.875 ns)
7 (1.875 ns > tCK(avg) ≥ 1.5 ns)
0
1
1
8 (1.5 ns > tCK(avg) ≥ 1.25 ns)
1
1
1
1
0
0
1
1
0
1
0
1
9 (1.25 ns > tCK(avg) ≥ 1.07ns)
10 (1.07 ns > tCK(avg) ≥ 0.935 ns)
11 (0.935 ns > tCK(avg) ≥ 0.833 ns)
12 (0.833 ns > tCK(avg) ≥ 0.75 ns)
* 1 : A5, A8, A11 ~ A13 must be programmed to 0 during MRS.
* 2 : The Rtt_WR value can be applied during writes even when Rtt_Nom is disabled. During write leveling, Dynamic ODT is not available.
Figure 2.3.4 MR2 Definition
2.3.4.1 Partial Array Self-Refresh (PASR)
If PASR (Partial Array Self-Refresh) is enabled, data located in areas of the array beyond the specified address range
shown in Figure 2.3.4 will be lost if Self-Refresh is entered. Data integrity will be maintained if tREFI conditions are met
and no Self-Refresh command is issued.
2.3.4.2 CAS Write Latency (CWL)
The CAS Write Latency is defined by MR2 (bits A3-A5), as shown in Figure 2.3.4. CAS Write Latency is the delay, in clock
cycles, between the internal Write command and the availability of the first bit of input data. DDR3 SDRAM does not
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support any half-clock latencies. The overall Write Latency (WL) is defined as Additive Latency (AL) + CAS Write Latency
(CWL); WL = AL + CWL. For more information on the supported CWL and AL settings based on the operating clock
frequency, refer to “Standard Speed Bins”.
2.3.4.3 Auto Self-Refresh (ASR) and Self-Refresh Temperature (SRT)
For more details refer to “Extended Temperature Usage”. DDR3 SDRAMs support Self-Refresh operation at all supported
temperatures. Applications requiring Self-Refresh operation in the Extended Temperature Range must use the ASR
function or program the SRT bit appropriately.
2.3.4.4 Dynamic ODT (Rtt_WR)
DDR3 SDRAM introduces a new feature “Dynamic ODT”. In certain application cases and to further enhance signal
integrity on the data bus, it is desirable that the termination strength of the DDR3 SDRAM can be changed without issuing
an MRS command. MR2 Register locations A9 and A10 configure the Dynamic ODT setings. In Write leveling mode, only
RTT_Nom is available. For details on Dynamic ODT operation, refer to “Dynamic ODT”.
2.3.5 Mode Register MR3
The Mode Register MR3 controls Multi-purpose registers. The Mode Register 3 is written by asserting low on CS#, RAS#,
CAS#, WE#, high on BA1 and BA0, and low on BA2 while controlling the states of address pins according to the below.
BA2
BA1
BA0
0
1
1
A13
A12
A11
A10
MRP Operation
A2
MPR
0
Normal operation *3
1
Dataflow from MPR
BA1 BA0
0
0
0
1
1
0
1
1
A9
A8
A7
A6
A5
A4
A3
0* 1
MPR Address
A1
A0
0
0
0
1
1
0
1
1
A2
MPR
MPR location
Predefined pattern
RFU
RFU
RFU
A1
A0
MPR Loc
Address Field
Mode Register 3
*2
MR Select
MR0
MR1
MR2
MR3
* 1 : A3 - A13 must be programmed to 0 during MRS.
* 2 : The predefined pattern will be used for read synchronization.
* 3 : When MPR control is set for normal operation (MR3 A[2] = 0) then MR3 A[1:0] will be ignored.
Figure 2.3.5 MR3 Definition
2.3.5.1 Multi-Purpose Register (MPR)
The Multi Purpose Register (MPR) function is used to Read out a predefined system timing calibration bit sequence. To
enable the MPR, a Mode Register Set (MRS) command must be issued to MR3 register with bit A2=1. Prior to issuing the
MRS command, all banks must be in the idle state (all banks precharged and tRP met). Once the MPR is enabled, any
subsequent RD or RDA commands will be redirected to the Multi Purpose Register. When the MPR is enabled, only RD
or RDA commands are allowed until a subsequent MRS command is issued with the MPR disabled (MR3 bit A2=0).
Power down mode, Self-Refresh and any other non-RD/RDA command is not allowed during MPR enable mode. The
RESET function is supported during MPR enable mode.
The Multi Purpose Register (MPR) function is used to Read out a predefined system timing calibration bit sequence. The
basic concept of the MPR is shown in Figure 2.3.5.1.
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Memory Core
(all banks
precharged)
MR3[A2]
Multipurpose
Register pre-defined
data for read
DQ, DM, DQS, DQS#
Figure 2.3.5.1 MPR Block Diagram
To enable the MPR, a MODE Register Set (MRS) command must be issued to MR3 Register with bit A2 = 1. Prior to
issuing the MRS command, all banks must be in the idle state (all banks precharged and tRP met). Once the MPR is
enabled, any subsequent RD or RDA commands will be redirected to the Multi Purpose Register.
The resulting operation, when a RD or RDA command is issued, is defined by MR3 bits A[1:0] when the MPR is enabled.
When the MPR is enabled, only RD or RDA commands are allowed until a subsequent MRS command is issued with the
MPR disabled (MR3 bit A2 = 0).
Note that in MPR mode RDA has the same functionality as a READ command which means the auto precharge part of
RDA is ignored. Power-Down mode, Self-Refresh and any other non-RD/RDA command is not allowed during MPR
enable mode. The RESET function is supported during MPR enable mode.
MPR MR3 Register Definition
MR3 A[2]
MR3 A[1:0]
MPR
MPR-Loc
0b
don’t care (0b or 1b)
1b
See MPR Definition
Table
Function
Normal operation, no MPR transaction. All subsequent Reads will come from DRAM
array. All subsequent Write will go to DRAM array.
Enable MPR mode, subsequent RD/RDA commands defined by MR3 A[1:0].
MPR Register Address Definition
The following Table provides an overview of the available data locations, how they are addressed by MR3 A[1:0] during a
MRS to MR3, and how their individual bits are mapped into the burst order bits during a Multi Purpose Register Read.
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MPR MR3 Register Definition
MR3
MR3
Function
A[2]
A[1:0]
1b
00b
Read predefined pattern
for system Calibration
1b
01b
RFU
1b
10b
RFU
1b
11b
RFU
Burst
Length
Read Address
A[2:0]
BL8
000b
BC4
000b
BC4
100b
BL8
BC4
BC4
BL8
BC4
BC4
BL8
BC4
BC4
000b
000b
100b
000b
000b
100b
000b
000b
100b
Burst Order and Data Pattern
Burst order 0,1,2,3,4,5,6,7
Pre-defined Data Pattern [0,1,0,1,0,1,0,1]
Burst order 0,1,2,3
Pre-defined Data Pattern [0,1,0,1]
Burst order 4,5,6,7
Pre-defined Data Pattern [0,1,0,1]
Burst order 0,1,2,3,4,5,6,7
Burst order 0,1,2,3
Burst order 4,5,6,7
Burst order 0,1,2,3,4,5,6,7
Burst order 0,1,2,3
Burst order 4,5,6,7
Burst order 0,1,2,3,4,5,6,7
Burst order 0,1,2,3
Burst order 4,5,6,7
NOTE: Burst order bit 0 is assigned to LSB and the burst order bit 7 is assigned to MSB of the selected MPR agent
MPR Functional Description
•
•
•
•
One bit wide logical interface via all DQ pins during READ operation.
Register Read on x16:
o DQL[0] and DQU[0] drive information from MPR.
o DQL[7:1] and DQU[7:1] either drive the same information as DQL[0], or they drive 0b.
Addressing during for Multi Purpose Register reads for all MPR agents:
o BA[2:0]: don’t care
o A[1:0]: A[1:0] must be equal to ‘00’b. Data read burst order in nibble is fixed
o A[2]: For BL=8, A[2] must be equal to 0b, burst order is fixed to [0,1,2,3,4,5,6,7], *) For Burst Chop 4
cases, the burst order is switched on nibble base A[2]=0b, Burst order: 0,1,2,3 *) A[2]=1b, Burst order:
4,5,6,7 *)
o A[9:3]: don’t care
o A10/AP: don’t care
o A12/BC: Selects burst chop mode on-the-fly, if enabled within MR0.
o A11, A13: don’t care
Regular interface functionality during register reads:
o Support two Burst Ordering which are switched with A2 and A[1:0]=00b.
o Support of read burst chop (MRS and on-the-fly via A12/BC)
o All other address bits (remaining column address bits including A10, all bank address bits) will be ignored
by the DDR3 SDRAM.
o Regular read latencies and AC timings apply.
o DLL must be locked prior to MPR Reads.
NOTE: *) Burst order bit 0 is assigned to LSB and burst order bit 7 is assigned to MSB of the selected MPR agent.
NOTE: Good reference for the example of MPR feature is the JEDEC standard No.93-3D, 4.10.4 Protocol example.
Relevant Timing Parameters
AC timing parameters are important for operating the Multi Purpose Register: tRP, tMRD, tMOD, and tMPRR. For more
details refer to “Electrical Characteristics & AC Timing”
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2.4 DDR3 SDRAM Command Description and Operation
2.4.1 Command Truth Table
[BA=Bank Address, RA=Row Address, CA=Column Address, BC#=Burst Chop, X=Don’t Care, V=Valid]
CKE
Function
Abbreviation
Mode Register Set
Refresh
Self Refresh Entry
MRS
REF
SRE
Self Refresh Exit
SRX
L
H
Single Bank Precharge
Precharge all Banks
Bank Activate
Write (Fixed BL8 or BC4)
Write (BC4, on the Fly)
Write (BL8, on the Fly)
Write with Auto Precharge (Fixed BL8 or BC4)
Write with Auto Precharge (BC4, on the Fly)
Write with Auto Precharge (BL8, on the Fly)
Read (Fixed BL8 or BC4)
Read (BC4, on the Fly)
Read (BL8, on the Fly)
Read with Auto Precharge (Fixed BL8 or BC4)
Read with Auto Precharge (BC4, on the Fly)
Read with Auto Precharge (BL8, on the Fly)
No Operation
Device Deselected
PRE
PREA
ACT
WR
WRS4
WRS8
WRA
WRAS4
WRAS8
RD
RDS4
RDS8
RDA
RDAS4
RDAS8
NOP
DES
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
Power Down Entry
PDE
H
L
Power Down Exit
PDX
L
H
ZQ Calibration Long
ZQ Calibration Short
ZQCL
ZQCS
H
H
H
H
Previous
Cycle
H
H
H
Current
Cycle
H
H
L
CS#
RAS#
CAS#
WE#
BA0BA2
A11,
A13
A12/
BC#
A10/
AP
L
L
L
H
L
L
L
L
X
H
L
L
L
X
H
L
H
H
X
H
BA
V
V
X
V
V
V
X
V
OP Code
V
V
V
V
X
X
V
V
V
V
X
V
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
H
L
H
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
X
H
X
H
X
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
H
X
H
X
H
X
H
H
L
L
H
L
L
L
L
L
L
H
H
H
H
H
H
H
X
H
X
H
X
L
L
BA
V
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
BA
V
X
V
X
V
X
X
X
V
V
V
V
L
H
V
V
V
L
H
V
L
H
V
L
H
V
L
H
V
X
V
X
V
X
X
X
L
L
L
H
H
H
L
L
L
H
H
H
V
X
V
X
V
X
H
L
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
CA
V
X
V
X
V
X
X
X
Row Address(RA)
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
RFU
V
X
V
X
V
X
X
X
A0A9
Notes
7,9,12
7,8,9,
12
10
11
6,12
6,12
Notes:
1. All DDR3 SDRAM commands are defined by states of CS#, RAS#, CAS#, WE# and CKE at the rising edge of the clock. The MSB of BA, RA and CA
are device density and configuration dependant.
2. RESET# is Low enable command which will be used only for asynchronous reset so must be maintained HIGH during any function.
3. Bank addresses (BA) determine which bank is to be operated upon. For (E)MRS BA selects an (Extended) Mode Register.
4. “V” means “H or L (but a defined logic level)” and “X” means either “defined or undefined (like floating) logic level”.
5. Burst reads or writes cannot be terminated or interrupted and Fixed/on-the-Fly BL will be defined by MRS.
6. The Power Down Mode does not perform any refresh operation.
7. The state of ODT does not affect the states described in this table. The ODT function is not available during Self Refresh.
8. Self Refresh Exit is asynchronous.
9. VREF(Both VrefDQ and VrefCA) must be maintained during Self Refresh operation. VrefDQ supply may be turned OFF and VREFDQ may take any
value between VSS and VDD during Self Refresh operation, provided that VrefDQ is valid and stable prior to CKE going back High and that first
Write operation or first Write Leveling Activity may not occur earlier than 512 nCK after exit from Self Refresh.
10. The No Operation command should be used in cases when the DDR3 SDRAM is in an idle or wait state. The purpose of the No Operation command
(NOP) is to prevent the DDR3 SDRAM from registering any unwanted commands between operations. A No Operation command will not terminate a
pervious operation that is still executing, such as a burst read or write cycle.
11. The Deselect command performs the same function as No Operation command.
12. Refer to the CKE Truth Table for more detail with CKE transition.
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2.4.1. CKE Truth Table
L
L
Command (N)3
RAS#, CAS#, WE#,
CS#
X
Maintain Power-Down
14,15
L
H
DESELECT or NOP
Power-Down Exit
11,14
L
L
X
Maintain Self-Refresh
15,16
L
H
DESELECT or NOP
Self-Refresh Exit
8,12,16
Bank(s) Active
H
L
DESELECT or NOP
Active Power-Down Entry
11,13,14
Reading
H
L
DESELECT or NOP
Power-Down Entry
11,13,14,17
Writing
H
L
DESELECT or NOP
Power-Down Entry
11,13,14,17
Precharging
H
L
DESELECT or NOP
Power-Down Entry
11,13,14,17
Refreshing
H
L
DESELECT or NOP
Precharge Power-Down Entry
11
All Bank Idle
H
L
DESELECT or NOP
Precharge Power-Down Entry
11,13,14,18
H
L
REFRESH
Self-Refresh
9.13.18
Current
State2
Power-Down
Self-Refresh
CKE
Previous Cycle1 (N-1)
Current Cycle1(N)
Action (N)3
Notes
Notes:
1. CKE (N) is the logic state of CKE at clock edge N; CKE (N-1) was the state of CKE at the previous clock edge.
2. Current state is defined as the state of the DDR3 SDRAM immediately prior to clock edge N.
3. COMMAND (N) is the command registered at clock edge N, and ACTION (N) is a result of COMMAND (N), ODT is not included here.
4. All states and sequences not shown are illegal or reserved unless explicitly described elsewhere in this document.
5. The state of ODT does not affect the states described in this table. The ODT function is not available during Self-Refresh.
6. CKE must be registered with the same value on tCKEmin consecutive positive clock edges. CKE must remain at the valid input level the entire time it
takes to achieve the tCKEmin clocks of registeration. Thus, after any CKE transition, CKE may not transition from its valid level during the time
period of tIS + tCKEmin + tIH.
7. DESELECT and NOP are defined in the Command Truth Table.
8. On Self-Refresh Exit DESELECT or NOP commands must be issued on every clock edge occurring during the tXS period. Read or ODT commands
may be issued only after tXSDLL is satisfied.
9. Self-Refresh mode can only be entered from the All Banks Idle state.
10. Must be a legal command as defined in the Command Truth Table.
11. Valid commands for Power-Down Entry and Exit are NOP and DESELECT only.
12. Valid commands for Self-Refresh Exit are NOP and DESELECT only.
13. Self-Refresh cannot be entered during Read or Write operations.
14. The Power-Down does not perform any refresh operations.
15. “X” means “don’t care“ (including floating around VREF) in Self-Refresh and Power-Down. It also applies to Address pins.
16. VREF (Both Vref_DQ and Vref_CA) must be maintained during Self-Refresh operation.VrefDQ supply may be turned OFF and VREFDQ may take
any value between VSS and VDD during Self Refresh operation, provided that VrefDQ is valid and stable prior to CKE going back High and that first
Write operation or first Write Leveling Activity may not occur earlier than 512 nCK after exit from Self Refresh.
17. If all banks are closed at the conclusion of the read, write or precharge command, then Precharge Power-Down is entered, otherwise Active PowerDown is entered.
18. ‘Idle state’ is defined as all banks are closed (tRP, tDAL, etc. satisfied), no data bursts are in progress, CKE is high, and all timings from previous
operations are satisfied (tMRD, tMOD, tRFC, tZQinit, tZQoper, tZQCS, etc.) as well as all Self-Refresh exit and Power-Down Exit parameters are
satisfied (tXS, tXP, tXPDLL, etc).
2.4.2 No Operation (NOP) Command
The No operation (NOP) command is used to instruct the selected DDR3 SDRAM to perform a NOP ( CS# low and
RAS#,CAS#,WE# high). This prevents unwanted commands from being registered during idle or wait states. Operations
already in progress are not affected.
2.4.3 Deselect(DES) Command
The Deselect function (CS# HIGH) prevents new commands from being executed by the DDR3 SDRAM. The DDR3
SDRAM is effectively deselected. Operations already in progress are not affected.
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2.4.4 DLL-off Mode
DDR3 DLL-off mode is entered by setting MR1 bit A0 to “1”; this will disable the DLL for subsequent operations until A0 bit
set back to “0”. The MR1 A0 bit for DLL control can be switched either during initialization or later. The DLL-off Mode
operations listed below are an optional feature for DDR3. The maximum clock frequency for DLL-off Mode is specified by
the parameter tCKDLL_OFF. There is no minimum frequency limit besides the need to satisfy the refresh interval, tREFI.
Due to latency counter and timing restrictions, only one value of CAS Latency (CL) in MR0 and CAS Write Latency (CWL)
in MR2 are supported. The DLL-off mode is only required to support setting of both CL=6 and CWL=6. DLL-off mode will
affect the Read data Clock to Data Strobe relationship (tDQSCK) but not the data Strobe to Data relationship (tDQSQ,
tQH). Special attention is needed to line up Read data to controller time domain.
Comparing with DLL-on mode, where tDQSCK starts from the rising clock edge (AL+CL) cycles after the Read command,
the DLL-off mode tDQSCK starts (AL+CL-1) cycles after the read command. Another difference is that tDQSCK may not
be small compared to tCK (it might even be larger than tCK) and the difference between tDQSCKmin and tDQSCKmax is
significantly larger than in DLL-on mode. The timing relations on DLL-off mode READ operation have shown at the
following Timing Diagram (CL=6, BL=8)
CK#
CK
Command
T0
T1
T2
T3
T4
T5
READ
NOP
NOP
NOP
NOP
NOP
T6
T7
T8
T9
T10
NOP
NOP
NOP
NOP
NOP
Address
DQS,DQS#(DLL_on)
RL (DLL_on) = AL+CL =6 (CL=6,AL=0)
CL=6
DQ(DLL_on)
RL (DLL_off) = AL+(CL-1) = 5
DQS,DQS#(DLL_off)
tDQSCK(DLL_off)_min
DQ(DLL_off)
tDQSCK(DLL_off)_max
DQS,DQS#(DLL_off)
DQ(DLL_off)
Don’t Care
Note: The tDQSCK is used here for DQS, DQS, and DQ to have a simplified diagram; the DLL_off shift will affect both timings in the same way and the
skew between all DQ, DQS, and DQS# signals will still be tDQSQ.
Figure 2.4.4 DLL-off mode READ Timing Operation
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2.4.5 DLL on/off switching procedure
DDR3 DLL-off mode is entered by setting MR1 bit A0 to “1”; this will disable the DLL for subsequent operation until A0 bit
set back to “0”.
2.4.5.1 DLL “on” to DLL “off” Procedure
To switch from DLL “on” to DLL “off” requires te frequency to be changed during Self-Refresh outlined in the following
procedure:
1. Starting from Idle state (all banks pre-charged, all timing fulfilled, and DRAMs On-die Termination resistors, RTT,
must be in high impedance state before MRS to MR1 to disable the DLL).
2. Set MR1 Bit A0 to “1” to disable the DLL.
3. Wait tMOD.
4. Enter Self Refresh Mode; wait until (tCKSRE) satisfied.
5. Change frequency, in guidance with “Input Clock Frequency Change” section.
6. Wait until a stable clock is available for at least (tCKSRX) at DRAM inputs.
7. Starting with the Self Refresh Exit command, CKE must continuously be registered HIGH until all tMOD timings from
any MRS command are satisfied. In addition, if any ODT features were enabled in the mode registers when Self
Refresh mode was entered, the ODT signal must continuously be registered LOW until all tMOD timings from any
MRS command are satisfied. If both ODT features were disabled in the mode registers when Self Refresh mode was
entered, ODT signal can be registered LOW or HIGH.
8. Wait tXS, and then set Mode Registers with appropriate values (especially an update of CL, CWL, and WR may be
necessary. A ZQCL command may also be issued after tXS).
9. Wait for tMOD, and then DRAM is ready for next command.
2.4.5.2 DLL “off” to DLL “on” Procedure
To switch from DLL “off” to DLL “on” (with required frequency change) during Self-Refresh:
1. Starting from Idle state (All banks pre-charged, all timings fulfilled and DRAMs On-die Termination resistors (RTT)
must be in high impedance state before Self-Refresh mode is entered.)
2. Enter Self Refresh Mode, wait until tCKSRE satisfied.
3. Change frequency, in guidance with "Input clock frequency change".
4. Wait until a stable clock is available for at least (tCKSRX) at DRAM inputs.
5. Starting with the Self Refresh Exit command, CKE must continuously be registered HIGH until tDLLK timing from
subsequent DLL Reset command is satisfied. In addition, if any ODT features were enabled in the mode registers
when Self Refresh mode was entered, the ODT signal must continuously be registered LOW until tDLLK timings from
subsequent DLL Reset command is satisfied. If both ODT features are disabled in the mode registers when Self
Refresh mode was entered, ODT signal can be registered LOW or HIGH.
6. Wait tXS, then set MR1 bit A0 to “0” to enable the DLL.
7. Wait tMRD, then set MR0 bit A8 to “1” to start DLL Reset.
8. Wait tMRD, then set Mode Registers with appropriate values (especially an update of CL, CWL and WR may be
necessary. After tMOD satisfied from any proceeding MRS command, a ZQCL command may also be issued during
or after tDLLK.)
9. Wait for tMOD, then DRAM is ready for next command (Remember to wait tDLLK after DLL Reset before applying
command requiring a locked DLL!). In addition, wait also for tZQoper in case a ZQCL command was issued.
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2.4.6. Input clock frequency change
Once the DDR3 SDRAM is initialized, the DDR3 SDRAM requires the clock to be “stable” during almost all states of
normal operation. This means that, once the clock frequency has been set and is to be in the “stable state”, the clock
period is not allowed to deviate except for what is allowed for by the clock jitter and SSC (spread spectrum clocking)
specifications.
The input clock frequency can be changed from one stable clock rate to another stable clock rate under two conditions:
(1) Self-Refresh mode and (2) Precharge Power-down mode. Outside of these two modes, it is illegal to change the clock
frequency.
For the first condition, once the DDR3 SDRAM has been successfully placed in to Self-Refresh mode and tCKSRE has
been satisfied, the state of the clock becomes a don’t care. Once a don’t care, changing the clock frequency is
permissible, provided the new clock frequency is stable prior to tCKSRX. When entering and exiting Self-Refresh mode
for the sole purpose of changing the clock frequency, the Self-Refresh entry and exit specifications must still be met.
The DDR3 SDRAM input clock frequency is allowed to change only within the minimum and maximum operating
frequency specified for the particular speed grade. Any frequency change below the minimum operating frequency would
require the use of DLL_on- mode -> DLL_off -mode transition sequence, refer to “DLL on/off switching procedure”.
The second condition is when the DDR3 SDRAM is in Precharge Power-down mode (either fast exit mode or slow exit
mode). If the RTT_NOM feature was enabled in the mode register prior to entering Precharge power down mode, the
ODT signal must continuously be registered LOW ensuring RTT is in an off state. If the RTT_NOM feature was disabled in
the mode register prior to entering Precharge power down mode, RTT will remain in the off state. The ODT signal can be
registered either LOW or HIGH in this case. A minimum of tCKSRE must occur after CKE goes LOW before the clock
frequency may change. The DDR3 SDRAM input clock frequency is allowed to change only within the minimum and
maximum operating frequency specified for the particular speed grade. During the input clock frequency change, ODT
and CKE must be held at stable LOW levels. Once the input clock frequency is changed, stable new clocks must be
provided to the DRAM tCKSRX before Precharge Power-down may be exited; after Precharge Power-down is exited and
tXP has expired, the DLL must be RESET via MRS. Depending on the new clock frequency, additional MRS commands
may need to be issued to appropriately set the WR, CL, and CWL with CKE continuously registered high. During DLL relock period, ODT must remain LOW and CKE must remain HIGH. After the DLL lock time, the DRAM is ready to operate
with new clock frequency.
2.4.7 Write leveling
For better signal integrity, the DDR3 memory module adopted fly-by topology for the commands, addresses, control
signals, and clocks. The fly-by topology has benefits from reducing number of stubs and their length, but it also causes
flight time skew between clock and strobe at every DRAM on the DIMM. This makes it difficult for the Controller to
maintain tDQSS, tDSS, and tDSH specification. Therefore, the DDR3 SDRAM supports a ‘write leveling’ feature to allow
the controller to compensate for skew.
The memory controller can use the ‘write leveling’ feature and feedback from the DDR3 SDRAM to adjust the DQS DQS# to CK - CK# relationship. The memory controller involved in the leveling must have adjustable delay setting on
DQS - DQS# to align the rising edge of DQS - DQS# with that of the clock at the DRAM pin. The DRAM asynchronously
feeds back CK - CK#, sampled with the rising edge of DQS - DQS#, through the DQ bus. The controller repeatedly delays
DQS - DQS# until a transition from 0 to 1 is detected. The DQS - DQS# delay established though this exercise would
ensure tDQSS specification.
Besides tDQSS, tDSS and tDSH specification also needs to be fulfilled. One way to achieve this is to combine the actual
tDQSS in the application with an appropriate duty cycle and jitter on the DQS - DQS# signals. Depending on the actual
tDQSS in the application, the actual values for tDQSL and tDQSH may have to be better than the absolute limits provided
in the chapter "AC Timing Parameters" in order to satisfy tDSS and tDSH specification. A conceptual timing of this
scheme is shown in Figure 2.4.7.
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T0
Source
T1
T2
T3
T4
T5
T6
T7
CK#
CK
diff_DQS
Tn
Destination
T0
T1
T2
T3
T4
T5
T6
CK#
CK
diff_DQS
DQ
0 or 1
0
0
0
Push DQS to capture
0-1 transition
diff_DQS
DQ
0 or 1
1
1
1
Figure 2.4.7 Write Leveling Concept
DQS - DQS# driven by the controller during leveling mode must be terminated by the DRAM based on ranks populated.
Similarly, the DQ bus driven by the DRAM must also be terminated at the controller.
One or more data bits carry the leveling feedback to the controller across the DRAM configurations X8 and X16. On a X16
device, both byte lanes should be leveled independently.
Therefore, a separate feedback mechanism should be available for each byte lane. The upper data bits should provide
the feedback of the upper diff_DQS(diff_UDQS) to clock relationship whereas the lower data bits would indicate the lower
diff_DQS(diff_LDQS) to clock relationship.
2.4.7.1 DRAM setting for write leveling & DRAM termination function in that mode
DRAM enters into Write leveling mode if A7 in MR1 set ’High’ and after finishing leveling, DRAM exits from write leveling
mode if A7 in MR1 set ’Low’. Note that in write leveling mode, only DQS/DQS# terminations are activated and deactivated
via ODT pin, unlike normal operation.
MR setting involved in the leveling procedure
Function
MR1
Enable
Disable
Write leveling enable
Output buffer mode (Qoff)
A7
A12
1
0
0
1
DRAM termination function in the leveling mode
ODT pin @DRAM
De-asserted
Asserted
DQS/DQS# termination
Off
On
DQs termination
Off
Off
NOTE: In Write Leveling Mode with its output buffer disabled (MR1[bit7] = 1 with MR1[bit12] = 1) all RTT_Nom settings are allowed; in Write Leveling
Mode with its output buffer enabled (MR1[bit7] = 1 with MR1[bit12] = 0) only RTT_Nom settings of RZQ/2, RZQ/4 and RZQ/6 are allowed.
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2.4.7.2 Procedure Description
The Memory controller initiates Leveling mode of all DRAMs by setting bit 7 of MR1 to 1. When entering write leveling
mode, the DQ pins are in undefined driving mode. During write leveling mode, only NOP or DESELECT commands are
allowed, as well as an MRS command to exit write leveling mode. Since the controller levels one rank at a time, the output
of other ranks must be disabled by setting MR1 bit A12 to 1.
The Controller may assert ODT after tMOD, at which time the DRAM is ready to accept the ODT signal.
The Controller may drive DQS low and DQS# high after a delay of tWLDQSEN, at which time the DRAM has applied ondie termination on these signals. After tDQSL and tWLMRD, the controller provides a single DQS, DQS# edge which is
used by the DRAM to sample CK - CK# driven from controller. tWLMRD(max) timing is controller dependent.
DRAM samples CK - CK# status with rising edge of DQS - DQS# and provides feedback on the DQ bus asynchronously
after tWLO timing. In this product, the DQ0 for x8 or DQ0 and DQ8 for x16 ("prime DQ bit(s)") provide the leveling
feedback. The DRAM's remaining DQ bits are driven Low statically after the first sampling procedure. There is a DQ
output uncertainty of tWLOE defined to allow mismatch on DQ bits. The tWLOE period is defined from the transition of the
earliest DQ bit to the corresponding transition of the latest DQ bit. There are no read strobes (DQS/DQS#) needed for
these DQs. Controller samples incoming DQ and decides to increment or decrement DQS - DQS# delay setting and
launches the next DQS/DQS# pulse after some time, which is controller dependent. Once a 0 to 1 transition is detected,
the controller locks DQS - DQS# delay setting and write leveling is achieved for the device. Figure 2.4.7.2 describes the
timing diagram and parameters for the overall Write Leveling procedure.
T1
T2
tWLH
tWLS
CK#(5)
CK
(2)
MRS
CMD
(3)
NOP
NOP
NOP
NOP
tWLH
tWLS
NOP
NOP
NOP
NOP
NOP
NOP
NOP
tMOD
ODT
tWLDQSEN
tDQSL(6)
tDQSH(6)
tDQSL(6)
tDQSH(6)
(4)
diff_DQS
tWLMRD
tWLO
tWLO
(1)
Prime DQ
tWLO
Late Remaining DQs
Early Remaining DQs
tWLO
tWLOE
Figure 2.4.7.2 Write leveling sequence [DQS - DQS# is capturing CK-CK# low at T1 and CK-CK# high at T2]
Undefined
Driving Mode
Time Break
DON’T CARE
Notes:
1. The JEDEC specification for DDR3 DRAM has the option to drive leveling feedback on a single prime DQ or all DQs. For best compatibility with
future DDR3 products, applications should use the lowest order DQ for each byte lane (DQ0 for x8, or DQ0 and DQ8 for x16).
2. MRS: Load MR1 to enter write leveling mode.
3. NOP: NOP or Deselect.
4. diff_DQS is the differential data strobe (DQS, DQS#). Timing reference points are the zero crossings. DQS is shown with solid line, DQS# is shown
with dotted line.
5. CK, CK# : CK is shown with solid dark line, where as CK# is drawn with dotted line.
6. DQS, DQS# needs to fulfill minimum pulse width requirements tDQSH(min) and tDQSL(min) as defined for regular Writes; the max pulse width is
system dependent.
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2.4.7.3 Write Leveling Mode Exit
The following sequence describes how the Write Leveling Mode should be exited:
1. After the last rising strobe edge, stop driving the strobe signals. Note: From now on, DQ pins are in undefined driving
mode, and will remain undefined, until tMOD after the respective MR command.
2. Drive ODT pin low (tIS must be satisfied) and continue registering low.
3. After the RTT is switched off, disable Write Level Mode via MRS command.
4. After tMOD is satisfied, any valid command may be registered. (MR commands may be issued after tMRD ).
2.4.8 Extended Temperature Usage
a. Auto Self-refresh supported
b. Extended Temperature Range supported
c. Double refresh required for operation in the Extended Temperature Range (applies only for devices supporting the
Extended Temperature Range)
Mode Register Description
Field
Bits
ASR
MR2 (A6)
SRT
MR2 (A7)
Description
Auto Self-Refresh (ASR)
when enabled, DDR3 SDRAM automatically provides Self-Refresh power management functions for all
supported operating temperature values. If not enabled, the SRT bit must be programmed to indicate TOPER
during subsequent Self-Refresh operation
0 = Manual SR Reference (SRT)
1 = ASR enable
Self-Refresh Temperature (SRT) Range
If ASR = 0, the SRT bit must be programmed to indicate TOPER during subsequent Self-Refresh operation
If ASR = 1, SRT bit must be set to 0b
0 = Normal operating temperature range
1 = Extended operating temperature range
2.4.8.1 Auto Self-Refresh mode - ASR Mode
DDR3 SDRAM provides an Auto Self-Refresh mode (ASR) for application ease. ASR mode is enabled by setting MR2 bit
A6 = 1b and MR2 bit A7 = 0b. The DRAM will manage Self-Refresh entry in either the Normal or Extended (optional)
Temperature Ranges. In this mode, the DRAM will also manage Self-Refresh power consumption when the DRAM
operating temperature changes, lower at low temperatures and higher at high temperatures.
If the ASR option is not supported by the DRAM, MR2 bit A6 must be set to 0b.
If the ASR mode is not enabled (MR2 bit.A6 = 0b), the SRT bit (MR2 A7) must be manually programmed with the
operating temperature range required during Self-Refresh operation.
Support of the ASR option does not automatically imply support of the Extended Temperature Range. Refer to Operating
Temperature Range for restrictions on operating conditions.
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2.4.8.2 Self-Refresh Temperature Range - SRT
SRT applies to devices supporting Extended Temperature Range only. If ASR = 0b, the Self-Refresh Temperature (SRT)
Range bit must be programmed to guarantee proper self-refresh operation. If SRT = 0b, then the DRAM will set an
appropriate refresh rate for Self-Refresh operation in the Normal Temperature Range. If SRT = 1b then the DRAM will set
an appropriate, potentially different, refresh rate to allow Self-Refresh operation in either the Normal or Extended
Temperature Ranges. The value of the SRT bit can effect self-refresh power consumption, please refer to the IDD table
for details.
For parts that do not support the Extended Temperature Range, MR2 bit A7 must be set to 0b and the DRAM should not
be operated outside the Normal Temperature Range.
Self-Refresh mode summary
MR2
A[6]
MR2
A[7]
0
0
Self-refresh rate appropriate for the Normal Temperature Range
Normal (0 to 85 C)
0
1
Self-refresh rate appropriate for either the Normal or Extended
Temperature Ranges. The DRAM must support Extended
Temperature Range. The value of the SRT bit can effect selfrefresh power consumption, please refer to the IDD table for
details.
Normal (0 to 85 C) and
o
Extended (85 to 95 C)
1
0
ASR enabled (for devices supporting ASR and Normal
Temperature Range). Self-Refresh power consumption is
temperature dependent
Normal (0 to 85 C)
1
0
ASR enabled (for devices supporting ASR and Extended
Temperature Range). Self-Refresh power consumption is
temperature dependent
Normal (0 to 85 C) and
o
Extended (85 to 95 C)
1
1
Illegal
Self-Refresh operation
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o
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3. ABSOLUTE MAXIMUM RATINGS AND AC & DC OPERATING CONDITIONS
3.1 Absolute Maximum DC Ratings.
Symbol
Parameter
Rating
Units
Note
VDD
Voltage on VDD pin relative to Vss
-0.4 V ~ 1.975 V
V
1,3
VDDQ
Voltage on VDDQ pin relative to Vss
-0.4 V ~ 1.975 V
V
1,3
VIN, VOUT
Voltage on any pin relative to Vss
-0.4 V ~ 1.975 V
V
1
TSTG
Storage Temperature
-55 to +150
°C
1,2
Notes:
1. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
2. Storage Temperature is the case surface temperature on the center/top side of the DRAM.
3. VDD and VDDQ must be within 300 mV of each other at all times; and VREF must be not greater than 0.6 x VDDQ, When VDD and VDDQ are less
than 500 mV; VREF may be equal to or less than 300 mV.
3.2 Component Operating Temperature Range
Symbol
Parameter
Rating
Tc = 0 to 85
Tc = 85 to 95
Tc = -40 to 85
Tc = 85 to 95
Tc = -40 to 85
Tc = 85 to 95
Tc = -40 to 85
Tc = 85 to 95
Tc = 95 to 105
Commercial
Industrial
TOPER
Automotive (A1)
Automotive (A2)
Units
°C
°C
°C
°C
°C
°C
°C
°C
°C
Notes
1,2
1,3
1,2
1,3
1,2
1,3
1,2
1,3
1,4
Notes:
1. Operating Temperature TOPER is the case surface temperature (Tc) on the center / top side of the DRAM.
2. This Temperature Range specifies the temperatures where all DRAM specifications will be supported. During operation, the DRAM case
temperature must be maintained in this range under all operating conditions.
3. Some applications require operation of the DRAM in the Extended Temperature Range (85°C < Tc ≤ 95°C). Full specifications are supported in this
range, but the following additional conditions apply:
a ) Refresh commands must be doubled in frequency, therefore reducing the Refresh interval tREFI to 3.9 µs.
b) If Self-Refresh operation is required for this range, it is mandatory to use either the Manual Self-Refresh mode with Extended Temperature Range
capability (MR2 A6 = 0b and MR2 A7 = 1b) or enable the Auto Self-Refresh mode (MR2 A6 = 1b and MR2 A7 = 0b).
4. No type of Self-Refresh mode is supported for this range.
3.3 Recommended DC Operating Conditions (SSTL_1.5)
Symbol
Parameter
VDD
Supply Voltage
VDDQ
Supply Voltage
for Output
DDR3
DDR3L
DDR3
DDR3L
Min
1.425
1.283
1.425
1.283
Rating
Typ
1.5
1.35
1.5
1.35
Max
1.575
1.45
1.575
1.45
Unit
Notes
V
V
V
V
1,2
3,4,5,6,7
1,2
3,4,5,6,7
Notes:
1. Under all conditions VDDQ must be less than or equal to VDD.
2. VDDQ tracks with VDD. AC parameters are measured with VDD and VDDQ tied together.
3. Maximum DC value may not be greater than 1.425V. The DC value is the linear average of VDD/VDD (t) over a long period of time.
4. If the limit is exceeded, the input levels are covered by the DDR3 specification.
5. With these supply voltages, the device operates with DDR3L specifications.
6. After initialized for DDR3 operation, the DDR3L may be used only upon reset.
7. This DDR3L product supports 1.5V (DDR3) operation, and if initialized as such, retains the original speed timings defined for DDR3L speed option.
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3.4 Thermal Resistance
Package
Substrate
Theta-ja
(Airflow = 0m/s)
Theta-ja
(Airflow = 1m/s)
Theta-ja
(Airflow = 2m/s)
Theta-jc
Units
78-ball
4-layer
41.3
25.4
23.2
3.2
C/W
96-ball
4-layer
39.7
23.7
21.6
3.6
C/W
4. AC & DC INPUT MEASUREMENT LEVELS
4.1. AC and DC Logic Input Levels for Single-Ended Signals
4.1.1 AC and DC Input Levels for Single-Ended Command and Address Signals
DDR3-800/1066/1333/1600
DDR3-1866/2133
Units
Note
Min.
Max.
Min.
Max.
V
1
DC input logic high
Vref + 0.100
VDD
Vref + 0.100
VDD
V
1
VIL.CA(DC100)
DC input logic low
VSS
Vref - 0.100
VSS
Vref - 0.100
V
1, 2, 5
VIH.CA(AC175)
AC input logic high
Vref + 0.175
Note2
--
--
V
1, 2, 5
VIL.CA(AC175)
AC input logic low
Note2
Vref - 0.175
--
--
V
1, 2, 5
VIH.CA(AC150)
AC input logic high
Vref + 0.150
Note2
--
--
V
1, 2, 5
VIL.CA(AC150)
AC input logic low
Note2
Vref - 0.150
--
--
V
1, 2, 5
VIH.CA(AC135)
AC input logic high
--
--
Vref + 0.135
Note2
V
1, 2, 5
VIL.CA(AC135)
AC input logic low
--
--
Note2
Vref - 0.135
V
1, 2, 5
VIH.CA(AC125)
AC input logic high
--
--
Vref + 0.125
Note2
V
1, 2, 5
VIL.CA(AC125)
AC input logic low
Reference Voltage for
ADD, CMD inputs
--
--
Note2
Vref - 0.125
V
1, 2, 5
0.49 * VDD
0.51* VDD
0.49 * VDD
0.51* VDD
V
3, 4
Units
Note
Symbol
Parameter
VIH.CA(DC100)
VREFCA(DC)
Symbol
Parameter
VIH.CA(DC90)
DDR3L-800/1066/1333/1600
DDR3L-1866
Min.
Max.
Min.
Max.
V
1
DC input logic high
Vref + 0.09
VDD
Vref + 0.09
VDD
V
1
VIL.CA(DC90)
DC input logic low
VSS
Vref - 0.09
VSS
Vref - 0.09
V
1, 2, 5
VIH.CA(AC160)
AC input logic high
Vref + 0.16
Note2
--
--
V
1, 2, 5
VIL.CA(AC160)
AC input logic low
Note2
Vref - 0.160
--
--
V
1, 2, 5
VIH.CA(AC135)
AC input logic high
Vref + 0.135
Note2
Vref + 0.135
Note2
V
1, 2, 5
VIL.CA(AC135)
AC input logic low
Note2
Vref - 0.135
Note2
Vref - 0.135
V
1, 2, 5
VIH.CA(AC125)
AC input logic high
--
--
Vref + 0.125
Note2
V
1, 2, 5
VIL.CA(AC125)
AC input logic low
Reference Voltage for
ADD, CMD inputs
--
--
Note2
Vref - 0.125
V
1, 2, 5
0.49 * VDD
0.51* VDD
0.49 * VDD
0.51* VDD
V
3, 4
VREFCA(DC)
Notes:
1. For input only pins except RESET.Vref=VrefCA(DC)
2. See "Overshoot and Undershoot Specifications"
3. The ac peak noise on Vref may not allow Vref to deviate from Vref(DC) by more than +/- 1.0% VDD.
4. For reference: DDR3 has approx. VDD/2 +/- 15mV, DDR3L has approx VDD/2 +/- 13.5mV.
5. To allow VREFCA margining, all DRAM Command and Address Input Buffers MUST use external VREF (provided by system) as the input for their
VREFCA pins. All VIH/L input level MUST be compared with the external VREF level at the 1st stage of the Command and Address input buffer
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4.1.2 AC and DC Logic Input Levels for Single-Ended Signals & DQ and DM
Symbol
Parameter
DDR3-800/1066
DDR3-1333/1600
DDR3-1866/2133
Min.
Max.
Min.
Max.
Min.
Units
Note
Max.
V
1
VIH.DQ(DC100)
DC input logic high
Vref +
0.100
VDD
Vref +
0.100
VDD
Vref +
0.100
VDD
V
1
VIL.DQ(DC100)
DC input logic low
VSS
Vref 0.100
VSS
Vref 0.100
VSS
Vref 0.100
V
1, 2, 5
VIH.DQ(AC175)
AC input logic high
Vref +
0.175
Note2
--
--
--
--
V
1, 2, 5
VIL.DQ(AC175)
AC input logic low
Note2
Vref 0.175
--
--
--
--
V
1, 2, 5
VIH.DQ(AC150)
AC input logic high
Vref +
0.150
Note2
Vref +
0.150
Note2
--
--
V
1, 2, 5
VIL.DQ(AC150)
AC input logic low
Note2
Vref 0.150
Note2
Vref 0.150
--
--
V
1, 2, 5
VIH.DQ(AC135)
AC input logic high
Vref +
0.135
Note2
Vref +
0.135
Note2
Vref +
0.135
Note2
V
1, 2, 5
VIL.DQ(AC135)
AC input logic low
Note2
Vref 0.135
Note2
Vref 0.135
Note2
Vref 0.135
V
1, 2, 5
VREFDQ(DC)
Reference Voltage
for DQ, DM inputs
0.49 *
VDD
0.51*
VDD
0.49 *
VDD
0.51*
VDD
0.49 *
VDD
0.51*
VDD
V
3, 4
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Symbol
Parameter
DDR3L-800/1066
DDR3L-1333/1600
DDR3L-1866
Units
Note
Min.
Max.
Min.
Max.
Min.
Max.
V
1
VIH.DQ(DC90)
DC input logic high
Vref +
0.09
VDD
Vref +
0.09
VDD
Vref +
0.09
VDD
V
1
VIL.DQ(DC90)
DC input logic low
VSS
Vref 0.09
VSS
Vref 0.09
VSS
Vref 0.09
V
1, 2, 5
VIH.DQ(AC160)
AC input logic high
Vref +
0.16
Note2
Vref +
0.16
Note2
--
--
V
1, 2, 5
VIL.DQ(AC160)
AC input logic low
Note2
Vref 0.16
Note2
Vref 0.16
--
--
V
1, 2, 5
VIH.DQ(AC135)
AC input logic high
Vref +
0.135
Note2
Vref +
0.135
Note2
Vref +
0.135
Note2
V
1, 2, 5
VIL.DQ(AC135)
AC input logic low
Note2
Vref 0.135
Note2
Vref 0.135
Note2
Vref 0.135
V
1, 2, 5
VIH.DQ(AC130)
AC input logic high
--
--
--
--
Vref +
0.13
Note2
V
1, 2, 5
VIL.DQ(AC130)
AC input logic low
--
--
--
--
Note2
Vref 0.13
V
1, 2, 5
VREFDQ(DC)
Reference Voltage
for DQ, DM inputs
0.49 *
VDD
0.51*
VDD
0.49 *
VDD
0.51*
VDD
0.49 *
VDD
0.51*
VDD
V
3, 4
Notes:
1. For input only pins except RESET#. Vref = VrefDQ(DC)
2. See "Overshoot and Undershoot Specifications"
3. The ac peak noise on Vref may not allow Vref to deviate from Vref(DC) by more than ± 1.0% VDD.
4. For reference: DDR3 has approx. VDD/2 ±15mV, and DDR3L has approx. VDD/2 ± 13.5mV.
5. Single-ended swing requirement for DQS-DQS#, is 350mV (peak to peak). Differential swing requirement for DQS-DQS#, is 700mV (peak to peak)
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4.2 Vref Tolerances
The dc-tolerance limits and ac-moist limits for the reference voltages VrefCA and VrefDQ are illustrated in the following
figure. It shows a valid reference voltage Vref(t) as a function of time. (Vref stands for VrefCA and VrefDQ likewise).
Vref(DC) is the linear average of Vref(t) over a very long period of time (e.g.,1 sec). This average has to meet the min/max
requirement in previous page. Furthermore Vref(t) may temporarily deviate from Vref(DC) by no more than ±1% VDD.
The voltage levels for setup and hold time measurements VIH(AC), VIH(DC), VIL(AC), and VIL(DC) are dependent on
Vref. “Vref” shall be understood as Vref(DC). The clarifies that dc-variations of Vref affect the absolute voltage a signal
has to reach to achieve a valid high or low level and therefore the time to which setup and hold is measured. System
timing and voltage budgets need to account for Vref(DC) deviations from the optimum position within the data-eye of the
input signals.
This also clarifies that the DRAM setup/hold specification and de-rating values need to include time and voltage
associated with Vref ac-noise. Timing and voltage effects due to ac-noise on Vref up to the specified limit (±1% of VDD)
are included in DRAM timing and their associated de-ratings.
Figure 4.2 Illustration of Vref(DC) tolerance and Vrefac-noise limits
Voltage
VDD
Vref ac-noise
Vref(D
Vref(t)
Vref(DC)
Vref(DC)
VSS
time
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4.3. AC and DC Logic Input Levels for Differential Signals
4.3.1 Differential signal definition
Differential Input Voltage (i.e. DQS–DQS#, CK–CK#)
Figure 4.3.1 Definition of differential ac-swing and “time above ac-level”
tDVAC
VIH.DIFF.AC.MIN
VIH.DIFF.MIN
Half cycle
VIH.DIFF.MAX
VIH.DIFF.AC.MAX
tDVAC
time
4.3.2 Differential swing requirements for clock (CK - CK#) and strobe (DQS - DQS#)
1.
Differential AC and DC Input Levels
Symbol
Parameter
VIHdiff
Differential input logic high
VILdiff
VIHdiff(ac)
VILdiff(ac)
Differential input logic low
Differential input high ac
Differential input low ac
Symbol
Parameter
VIHdiff
Differential input logic high
VILdiff
VIHdiff(ac)
VILdiff(ac)
Differential input logic low
Differential input high ac
Differential input low ac
DDR3-800, 1066, 1333, & 1600
Min
Max
+0.200
Note3
Note3
2 x ( VIH(ac) – Vref )
Note3
-0.200
Note3
2 x ( Vref - VIL(ac) )
DDR3L-800, 1066, 1333, & 1600
Min
Max
+0.180
Note3
Note3
2 x ( VIH(ac) – Vref )
Note3
-0.180
Note3
2 x ( Vref - VIL(ac) )
unit
Notes
V
1
V
V
V
1
2
2
unit
Notes
V
1
V
V
V
1
2
2
Notes:
1. Used to define a differential signal slew-rate.
2. For CK - CK# use VIH/VIL(ac) of ADD/CMD and VREFCA; for DQS - DQS#, DQSL, DQSL#, DQSU, DQSU# use VIH/VIL(ac) of DQs and VREFDQ; if
a reduced ac-high or ac-low level is used for a signal group, then the reduced level applies also here.
3. These values are not defined; however, the single-ended signals CK, CK#, DQS, DQS#, DQSL, DQSL#, DQSU, DQSU# need to be within the
respective limits (VIH(dc) max, VIL(dc)min) for single-ended signals as well as the limitations for overshoot and undershoot.
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4.3.2.2 Allowed time before ringback (tDVAC) for CK - CK# and DQS - DQS#
DDR3-800/1066/1333/1600
Slew
Rate
[V/ns]
DDR3-1866/2133
tDVAC [ps] @
|VIH/Ldiff(AC)| =
350mV
tDVAC [ps] @
|VIH/Ldiff(AC)| =
300mV
tDVAC [ps] @
|VIH/Ldiff(AC)| =
(DQS - DQS#) only
tDVAC [ps] @
|VIH/Ldiff(AC)| =
300mV
tDVAC [ps] @
|VIH/Ldiff(AC)| =
(CK - CK#) only
> 4.0
75
175
214
134
139
4
57
170
214
134
139
3
50
167
191
112
118
2
38
119
146
67
77
1.8
34
102
131
52
63
1.6
29
81
113
33
45
1.4
22
54
88
9
23
1.2
Note
19
56
Note
Note
1
Note
Note
11
Note
Note
<1
Note
Note
Note
Note
Note
DDR3L-800/1066/1333/1600
Slew
Rate
[V/ns]
DDR3L-1866
tDVAC [ps] @
|VIH/Ldiff(AC)| =
320mV
tDVAC [ps] @
|VIH/Ldiff(AC)| =
270mV
tDVAC [ps] @
|VIH/Ldiff(AC)| =
270mV
tDVAC [ps] @
|VIH/Ldiff(AC)| =
250mV
tDVAC [ps] @
|VIH/Ldiff(AC)| =
260mV
> 4.0
189
201
163
168
176
4
189
201
163
168
176
3
162
179
140
147
154
2
109
134
95
105
111
1.8
91
119
80
91
97
1.6
69
100
62
74
78
1.4
40
76
37
52
56
1.2
Note
44
5
22
24
1
Note
Note
Note
Note
Note
<1
Note
Note
Note
Note
Note
Note: The rising input differential signal shall become equal to or greater than VIHdiff(ac) level; and the falling input differential signal shall become
equal to or less than VILdiff(ac) level
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4.3.3. Single-ended requirements for differential signals
Each individual component of a differential signal (CK, DQS, DQSL, DQSU, CK#, DQS#, DQSL#, or DQSU#) has also to
comply with certain requirements for single-ended signals.
CK and CK# have to approximately reach VSEHmin / VSELmax (approximately equal to the ac-levels (VIH(ac) / VIL(ac) )
for ADD/CMD signals) in every half-cycle. DQS, DQSL, DQSU, DQS#, DQSL# have to reach VSEHmin / VSELmax
(approximately the ac-levels (VIH(ac) / VIL(ac) ) for DQ signals) in every half-cycle preceding and following a valid
transition.
4.3.3.1. Single-ended levels for CK, DQS, DQSL, DQSU, CK#, DQS#, DQSL# or DQSU#
Symbol
VSEH
VSEL
Parameter
Single-ended high-level for strobes
Single-ended high-level for CK, CK
Single-ended low-level for strobes
Single-ended Low-level for CK, CK
DDR3/DDR3L-800, 1066, 1333, & 1600
Min
Max
(VDDQ/2) + 0.175
note3
(VDDQ/2) + 0.175
note3
note3
(VDDQ/2) - 0.175
note3
(VDDQ/2) - 0.175
Unit
Notes
V
V
V
V
1, 2
1, 2
1, 2
1, 2
Notes:
1. For CK, CK# use VIH/VIL(ac) of ADD/CMD; for strobes (DQS, DQS#, DQSL, DQSL#, DQSU, DQSU#) use VIH/VIL(ac) of DQs.
2. VIH(ac)/VIL(ac) for DQs is based on VREFDQ; VIH(ac)/VIL(ac) for ADD/CMD is based on VREFCA; if a reduced ac-high or ac-low level is used for a
signal group, then the reduced level applies also here
3. These values are not defined, however the single-ended signals CK, CK#, DQS, DQS#, DQSL, DQSL#, DQSU, DQSU# need to be within the
respective limits (VIH(dc) max, VIL(dc)min) for single-ended signals as well as the limitations for overshoot and undershoot.
VDD or VDDQ
VSEHmin
VSEH
VDD/2 or VDDQ/2
CK or DQS
VSELmax
VSS or VSSQ
VSEL
time
Figure 4.3.3 Single-ended requirement for differential signals.
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4.4 Differential Input Cross Point Voltage
To guarantee tight setup and hold times as well as output skew parameters with respect to clock and strobe, each cross
point voltage of differential input signals (CK, CK and DQS, DQS) must meet the requirements in the following table. The
differential input cross point voltage Vix is measured from the actual cross point of true and completement signal to the
midlevel between of VDD and VSS.
VDD
CK#,DQS#
VIX
VDD/2
VIX
VIX
CK,DQS
VSS
Figure 4.4. Vix Definition
4.4.1 Cross point voltage for differential input signals (CK, DQS)
Symbol
Parameter
DDR3-800, 1066, 1333, 1600, & 1866
Min.
Max.
Unit
Differential Input Cross Point Voltage relative to VDD/2 for
CK, CK
-150
150
mV
-175
175
mV
Differential Input Cross Point Voltage relative to VDD/2 for
DQS, DQS
-150
150
mV
Vix
Note
1
Note:
1. Extended range for Vix is only allowed for clock and if single-ended clock input signals CK and CK# are monotonic with a single-ended swing VSEL /
VSEH of at least VDD/2 +/-250 mV, and when the differential slew rate of CK - CK# is larger than 3 V/ns.
4.5 Slew Rate Definitions for Single-Ended Input Signals
See “Address / Command Setup, Hold and Derating” for single-ended slew rate definitions for address and command
signals.
See “Data Setup, Hold and Slew Rate Derating” for single-ended slew rate definitions for data signals.
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4.6. Slew Rate Definition for Differential Input Signals
4.6.1 Differential Input Slew Rate Definition
Description
Differential input slew rate for rising edge (CK-CK# & DQSDQS#)
Differential input slew rate for falling edge (CK-CK# & DQSDQS#)
Measured
From
To
Defined by
VILdiffmax
VIHdiffmin
[VIHdiffmin-VILdiffmax] / DeltaTRdiff
VIHdiffmin
VILdiffmax
[VIHdiffmin-VILdiffmax] / DeltaTFdiff
Differential Input Voltage(i.e.
DQS-DQS#, CK-CK#)
Note : The differential signal (i.e., CK-CK# & DQS-DQS#) must be linear between these thresholds.
Figure 4.6.1 Input Nominal Slew Rate Definition for DQS, DQS# and CK, CK#
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5. AC AND DC OUTPUT MEASUREMENT LEVELS
5.1 Single Ended AC and DC Output Levels
Symbol
VOH(DC)
VOM(DC)
VOL(DC)
VOH(AC)
VOL(AC)
Parameter
DC output high measurement level (for IV curve linearity)
DC output mid measurement level (for IV curve linearity)
DC output low measurement level (fro IV curve linearity)
AC output high measurement level (for output SR)
AC output low measurement level (for output SR)
Value
0.8xVDDQ
0.5xVDDQ
0.2xVDDQ
VTT+0.1xVDDQ
VTT-0.1xVDDQ
Unit
V
V
V
V
V
Notes
1
1
NOTE 1. The swing of ± 0.1 × VDDQ is based on approximately 50% of the static single-ended output high or low swing with a driver impedance of 40Ω
and an effective test load of 25Ω to VTT = VDDQ/2.
5.2 Differential AC and DC Output Levels
Symbol
VOHdiff(AC)
VOLdiff(AC)
Parameter
AC differential output high measurement level (for output SR)
AC differential output low measurement level (for output SR)
Value
+0.2 x VDDQ
-0.2 x VDDQ
Unit
V
V
Notes
1
1
NOTE 1. The swing of ± 0.2 × VDDQ is based on approximately 50% of the static single-ended output high or low swing with a driver impedance of 40Ω
and an effective test load of 25Ω to VTT = VDDQ/2 at each of the differential outputs.
5.3 Single Ended Output Slew Rate
5.3.1 Single Ended Output Slew Rate Definition
Measured
From
To
VOL(AC)
VOH(AC)
VOH(AC)
VOL(AC)
Description
[VOH(AC)-VOL(AC)] / DeltaTRse
[VOH(AC)-VOL(AC)] / DeltaTFse
Single Ended Output Voltage(i.e. DQ)
Single ended output slew rate for rising edge
Single ended output slew rate for falling edge
Defined by
Figure 5.3.1 Single Ended Output Slew Rate Definition
5.3.2 Output Slew Rate (single-ended)
Parameter
Single-ended Output
Slew Rate
Symbol
DDR3
DDR3L
SRQse
DDR3-800
Min. Max.
2.5
5
1.75
5
DDR3-1066
Min. Max.
2.5
5
1.75
5
DDR3-1333
Min.
Max.
2.5
5
1.75
5
DDR3-1600
Min.
Max.
2.5
5
1.75
5
DDR3-1866
Min. Max.
2.5
5
1.75
5
Note: SR: Slew Rate. Q: Query Output (like in DQ, which stands for Data-in, Query -Output). se: Single-ended signals. For Ron = RZQ/7 setting.
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Unit
V/ns
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
5.4 Differential Output Slew Rate
5.4.1 Differential Output Slew Rate Definition
Measured
Description
From
VOLdiff(AC)
VOHdiff(AC)
Differential output slew rate for rising
Differential output slew rate for falling
Defined by
To
VOHdiff(AC)
VOLdiff(AC)
[VOHdiff(AC)-VOLdiff(AC)]/DeltaTRdiff
[VOHdiff(AC)-VOLdiff(AC)]/DeltaTFdiff
Note: Output slew rate is verified by design and characterization, and not 100% tested in production.
Figure 5.4.1 Differential Output Slew Rate Definition
5.4.2 Differential Output Slew Rate
Parameter
Symbol
Differential Output Slew
DDR3
Rate
DDR3L
SRQdiff
DDR3-800
Min.
Max.
DDR3-1066
Min. Max.
DDR3-1333
Min. Max.
DDR3-1600
Min.
Max.
DDR3-1866
Min. Max.
5
10
5
10
5
10
5
10
5
10
3.5
12
3.5
12
3.5
12
3.5
12
3.5
12
Unit
V/ns
Description: SR: Slew Rate, Q: Query Output (like in DQ, which stands for Data-in, Query-Output), diff: Differential Signals, For Ron = RZQ/7 setting
5.5 Reference Load for AC Timing and Output Slew Rate
The following figure represents the effective reference load of 25 ohms used in defining the relevant AC timing parameters
of the device as well as output slew rate measurements. It is not intended as a precise representation of any particular
system environment or a depiction of the actual load presented by a production tester. System designers should use IBIS
or other simulation tools to correlate the timing reference load to a system environment. Manufacturers correlate to their
production test conditions, generally one or more coaxial transmission lines terminated at the tester electronics.
VDDQ
DUT
25ohm
DQ,
DQS,
DQS#
CK,CK#
VTT=VDDQ/2
Timing Reference Point
Figure 5.5 Reference Load for AC Timing and Output Slew Rate
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5.6 Overshoot and Undershoot Specifications
5.6.1 AC Overshoot/Undershoot Specification for Address and Control Pins
Item
DDR3-800
DDR3-1066
DDR3-1333
DDR3-1600
DDR3-1866
Units
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above VDD
undershoot area below VSS
0.4
0.4
0.67
0.67
0.4
0.4
0.5
0.5
0.4
0.4
0.4
0.4
0.4
0.4
0.33
0.33
0.4
0.4
0.28
0.28
V
V
V-ns
V-ns
DDR3-1600
0.4
0.4
0.13
0.13
DDR3-1866
0.4
0.4
0.11
0.11
Units
V
V
V-ns
V-ns
Note : A0-A13, BA0-BA2, CS#, RAS#, CAS#, WE#, CKE, ODT
Maximum Amplitude
Volts(V)
Overshoot Area
VDD
VSS
Undershoot Area
Maximum Amplitude
Time(ns)
5.6.2 AC Overshoot/Undershoot Specification for Clock, Data, Strobe, and Mask
Item
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above VDD
undershoot area below VSS
DDR3-800
0.4
0.4
0.25
0.25
DDR3-1066
0.4
0.4
0.19
0.19
DDR3-1333
0.4
0.4
0.15
0.15
Note : CK, CK#, DQ, DQS, DQS#, DM
Maximum Amplitude
Volts(V)
Overshoot Area
VDDQ
VSSQ
Maximum Amplitude
Time(ns)
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5.7 34Ohm Output Driver DC Electrical Characteristics
A Functional representation of the output buffer is shown as below. Output driver impedance RON is defined by the value
ofthe external reference resistor RZQ as follows:
RON34 = RZQ / 7 (nominal 34.4ohms +/-10% with nominal RZQ=240ohms)
The individual pull-up and pull-down resistors (RONPu and RONPd) are defined as follows:
RONPu = [VDDQ-Vout] / | Iout | ------------------- under the condition that RONPd is turned off (1)
RONPd = Vout / | Iout | -------------------------------under the condition that RONPu is turned off (2)
Chip in Drive Mode
Output
Driver
VDDQ
To other circuitry
IPu
RONPu
DQ
Iout
RONPd
Vout
IPd
VSSQ
Figure 5.7 Output Driver : Definition of Voltages and Currents
5.7.1 Output Driver DC Electrical Characteristics
DDR3 (assuming 1.5V, RZQ = 240ohms; entire operating temperature range; after proper ZQ calibration)
RONNom
Resistor
RON34Pd
34 ohms
RON34Pu
RON40Pd
40 ohms
RON40Pu
Mismatch between pull-up and pull-down, MMPuPd
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Vout
VOLdc=0.2xVDDQ
VOMdc=0.5xVDDQ
Min
0.6
0.9
Nom
1
1
Max
1.1
1.1
Unit
RZQ/7
RZQ/7
Notes
1,2,3
1,2,3
VOHdc =0.8xVDDQ
VOLdc=0.2xVDDQ
0.9
0.9
1
1
1.4
1.4
RZQ/7
RZQ/7
1,2,3
1,2,3
VOMdc=0.5xVDDQ
VOHdc=0.8xVDDQ
0.9
0.6
1
1
1.1
1.1
RZQ/7
RZQ/7
1,2,3
1,2,3
VOLdc=0.2xVDDQ
0.6
1
1.1
RZQ/6
1,2,3
VOMdc=0.5xVDDQ
0.9
1
1.1
RZQ/6
1,2,3
VOHdc =0.8xVDDQ
0.9
1
1.4
RZQ/6
1,2,3
VOLdc=0.2xVDDQ
0.9
1
1.4
RZQ/6
1,2,3
VOMdc=0.5xVDDQ
0.9
1
1.1
RZQ/6
1,2,3
VOHdc=0.8xVDDQ
0.6
1
1.1
RZQ/6
1,2,3
VOMdc= 0.5xVDDQ
-10
+10
%
1,2,4
40
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
DDR3L (assuming 1.35V, RZQ = 240ohms; entire operating temperature range; after proper ZQ calibration)
RONNom
Resistor
RON34Pd
34 ohms
RON34Pu
40 ohms
40 ohms
RON40Pd
RON40Pu
Mismatch between pull-up and pull-down, MMPuPd
Vout
VOLdc=0.2xVDDQ
VOMdc=0.5xVDDQ
Min
0.6
0.9
Nom
1
1
Max
1.15
1.15
Unit
RZQ/7
RZQ/7
Notes
1,2,3
1,2,3
VOHdc =0.8xVDDQ
VOLdc=0.2xVDDQ
0.9
0.9
1
1
1.45
1.45
RZQ/7
RZQ/7
1,2,3
1,2,3
VOMdc=0.5xVDDQ
VOHdc=0.8xVDDQ
0.9
0.6
1
1
1.15
1.15
RZQ/7
RZQ/7
1,2,3
1,2,3
VOLdc=0.2xVDDQ
0.6
1
1.15
RZQ/6
1,2,3
VOMdc=0.5xVDDQ
0.9
1
1.15
RZQ/6
1,2,3
VOHdc =0.8xVDDQ
0.9
1
1.45
RZQ/6
1,2,3
VOLdc=0.2xVDDQ
0.9
1
1.45
RZQ/6
1,2,3
VOMdc=0.5xVDDQ
0.9
1
1.15
RZQ/6
1,2,3
VOHdc=0.8xVDDQ
0.6
1
1.15
RZQ/6
1,2,3
VOMdc= 0.5xVDDQ
-10
+10
%
1,2,4
Notes:
1. The tolerance limits are specified after calibration with stable voltage and temperature. For the behavior of the tolerance limits if temperature or
voltage changes after calibration, see following section on voltage and temperature sensitivity.
2. The tolerance limits are specified under the condition that VDDQ=VDD and that VSSQ=VSS.
3. Pull-down and pull-up output driver impedances are recommended to be calibrated at 0.5xVDDQ. Other calibration schemes may be used to
achieve the linearity spec shown above, e.g. calibration at 0.2 * VDDQ and 0.8 x VDDQ.
4. Measurement definition for mismatch between pull-up and pull-down, MMPuPd:
Measure RONPu and RONPd, both at 0.5 x VDDQ:
MMPuPd = [RONPu - RONPd] / RONNom x 100
5.7.2 Output Driver Temperature and Voltage sensitivity
If temperature and/or voltage after calibration, the tolerance limits widen according to the following table below.
Delta T = T - T(@calibration); Delta V = VDDQ - VDDQ(@calibration); VDD = VDDQ
5.7.2.1 Output Driver Sensitivity Definition
Items
Min.
Max.
Unit
RONPU@VOHdc
0.6 - dRONdTH*lDelta Tl - dRONdVH*lDelta Vl
1.1 + dRONdTH*lDelta Tl - dRONdVH*lDelta Vl
RZQ/7
RON@VOMdc
0.9 - dRONdTM*lDelta Tl - dRONdVM*lDelta Vl
1.1 + dRONdTM*lDelta Tl - dRONdVM*lDelta Vl
RZQ/7
RONPD@VOLdc
0.6 - dRONdTL*lDelta Tl - dRONdVL*lDelta Vl
1.1 + dRONdTL*lDelta Tl - dRONdVL*lDelta Vl
RZQ/7
Note: dRONdT and dRONdV are not subject to production test but are verified by design and characterization.
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5.7.2.2 Output Driver Voltage and Temperature Sensitivity
Speed Bin
Items
dRONdTM
dRONdVM
dRONdTL
dRONdVL
dRONdTH
dRONdVH
DDR3-800/1066/1333
Min.
Max
0
1.5
0
0.15
0
1.5
0
0.15
0
1.5
0
0.15
DDR3-1600/1866
Min.
0
0
0
0
0
0
Max
1.5
0.13
1.5
0.13
1.5
0.13
Unit
%/°C
%/mV
%/°C
%/mV
%/°C
%/mV
Note: dRONdT and dRONdV are not subject to production test but are verified by design and characterization.
5.8 On-Die Termination (ODT) Levels and I-V Characteristics
5.8.1 On-Die Termination (ODT) Levels and I-V Characteristics
On-Die Termination effective resistance RTT is defined by bits A9, A6, and A2 of the MR1 Register.
ODT is applied to the DQ, DM, DQS/DQS, and TDQS/TDQS (x8 devices only) pins.
A functional representation of the on-die termination is shown in the following figure. The individual pull-up and pull-down
resistors (RTTPu and RTTPd) are defined as follows:
RTTPu = [VDDQ - Vout] / | Iout | ------------------ under the condition that RTTPd is turned off (3)
RTTPd = Vout / | Iout | ------------------------------ under the condition that RTTPu is turned off (4)
Chip in Termination Mode
ODT
VDDQ
To other circuitry
IPu
Iout = Ipd -Ipu
RTTPu
DQ
Iout
RTTPd
Vout
IPd
VSSQ
Figure 5.8.1 On-Die Termination : Definition of Voltages and Currents
5.8.2 ODT DC Electrical Characteristics
The following table provides an overview of the ODT DC electrical characteristics. The values for RTT60Pd120,
RTT60Pu120, RTT120Pd240, RTT120Pu240, RTT40Pd80, RTT40Pu80, RTT30Pd60, RTT30Pu60, RTT20Pd40,
RTT20Pu40 are not specification requirements, but can be used as design guide lines:
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ODT DC Electrical Characteristics
(assuming RZQ = 240ohms +/- 1% entire operating temperature range; after proper ZQ calibration)
MR1 A9,
A6, A2
RTT
Resistor
Vout
Min
Nom
VOLdc = 0.2 x VDDQ
0.6
1
RZQ
1,2,3,4
RZQ
1,2,3,4
0.5 x VDDQ
0.9
1
1.1
0.9
1
1.4
1.45
0.9
1
1.4
RZQ
1,2,3,4
0.9
1
1.1
1.15
RZQ
1,2,3,4
VOHdc = 0.8 x VDDQ
VIL(ac) to VIH(ac)
VOLdc = 0.2 x VDDQ
0.5 x VDDQ
VOHdc = 0.8 x VDDQ
0.6
0.9
0.6
0.9
0.9
1
1
1
1
1
1.1
1.6
1.1
1.1
1.4
1.15
RZQ
RZQ/2
RZQ/2
RZQ/2
RZQ/2
1,2,3,4
1,2,5
1,2,3,4
1,2,3,4
1,2,3,4
VOLdc = 0.2 x VDDQ
0.5 x VDDQ
VOHdc = 0.8 x VDDQ
VIL(ac) to VIH(ac)
VOLdc = 0.2 x VDDQ
0.5 x VDDQ
VOHdc = 0.8 x VDDQ
0.9
0.9
0.6
0.9
0.6
0.9
0.9
1
1
1
1
1
1
1
1.4
1.1
1.1
1.6
1.1
1.1
1.4
1.45
RZQ/2
RZQ/2
RZQ/2
RZQ/4
RZQ/3
RZQ/3
RZQ/3
1,2,3,4
1,2,3,4
1,2,3,4
1,2,5
1,2,3,4
1,2,3,4
1,2,3,4
VOLdc = 0.2 x VDDQ
0.5 x VDDQ
VOHdc = 0.8 x VDDQ
VIL(ac) to VIH(ac)
VOLdc = 0.2 x VDDQ
0.5 x VDDQ
VOHdc = 0.8 x VDDQ
0.9
0.9
0.6
0.9
0.6
0.9
0.9
1
1
1
1
1
1
1
1.4
1.1
1.1
1.6
1.1
1.1
1.4
1.45
RZQ/3
RZQ/3
RZQ/3
RZQ/6
RZQ/4
RZQ/4
RZQ/4
1,2,3,4
1,2,3,4
1,2,3,4
1,2,5
1,2,3,4
1,2,3,4
1,2,3,4
VOLdc = 0.2 x VDDQ
0.5 x VDDQ
VOHdc = 0.8 x VDDQ
VIL(ac) to VIH(ac)
VOLdc = 0.2 x VDDQ
0.5 x VDDQ
VOHdc = 0.8 x VDDQ
0.9
0.9
0.6
0.9
0.6
0.9
0.9
1
1
1
1
1
1
1
1.4
1.1
1.1
1.6
1.1
1.1
1.4
1.45
RZQ/4
RZQ/4
RZQ/4
RZQ/8
RZQ/6
RZQ/6
RZQ/6
1,2,3,4
1,2,3,4
1,2,3,4
1,2,5
1,2,3,4
1,2,3,4
1,2,3,4
VOLdc = 0.2 x VDDQ
RTT20Pu40
0.5 x VDDQ
VOHdc = 0.8 x VDDQ
RTT20
VIL(ac) to VIH(ac)
Deviation of VM w.r.t VDDQ/2, DVM
0.9
0.9
0.6
0.9
-5
1
1
1
1
-
1.4
1.1
1.1
1.6
+5
1.45
RZQ/6
RZQ/6
RZQ/6
RZQ/12
%
1,2,3,4
1,2,3,4
1,2,3,4
1,2,5
1,2,5,6
60Ω
RTT60
RTT40Pd80
40Ω
RTT40Pu80
RTT40
RTT30Pd60
30Ω
RTT30Pu60
RTT30
RTT20Pd40
20Ω
1,2,3,4
0.5 x VDDQ
RTT60Pu120
1,0,0
RZQ
VOLdc = 0.2 x VDDQ
RTT60Pd120
1,0,1
Notes
1.45
120Ω
RTT120
0,1,1
Unit
VOHdc = 0.8 x VDDQ
RTT120Pu240
0,0,1
Max
(DDR3L)
1.15
1.15
RTT120Pd240
0,1,0
Max
(DDR3)
1.1
1.65
1.15
1.15
1.45
1.15
1.15
1.65
1.15
1.15
1.45
1.15
1.15
1.65
1.15
1.15
1.45
1.15
1.15
1.65
1.15
1.15
1.45
1.15
1.15
1.65
+5
Notes:
1. The tolerance limits are specified after calibration with stable voltage and temperature. For the behavior of the tolerance limits if temperature or
voltage changes after calibration, see following section on voltage and temperature sensitivity.
2. The tolerance limits are specified under the condition that VDDQ = VDD and that VSSQ = VSS.
3. Pull-down and pull-up ODT resistors are recommended to be calibrated at 0.5 x VDDQ. Other calibration schemes may be used to achieve the
linearity spec shown above.
4. Not a specification requirement, but a design guide line.
5. Measurement definition for RTT:
Apply VIH(ac) to pin under test and measure current I(VIH(ac)), then apply VIL(ac) to pin under test and measure current I(VIL(ac)) respectively.
RTT = [VIH(ac) - VIL(ac)] / [I(VIH(ac)) - I(VIL(ac))]
6. Measurement definition for VM and DVM:
Measure voltage (VM) at test pin (midpoint) with no load: Delta VM = [2VM / VDDQ -1] x 100
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5.8.3 ODT Temperature and Voltage sensitivity
If temperature and/or voltage after calibration, the tolerance limits widen according to the following table.
Delta T = T - T(@calibration); Delta V = VDDQ - VDDQ(@calibration); VDD = VDDQ
5.8.3.1 ODT Sensitivity Definition
min
0.9 - dRTTdT*lDelta Tl - dRTTdV*lDelta Vl
RTT
max
1.6 + dRTTdT*lDelta Tl + dRTTdV*lDelta Vl
Unit
RZQ/2,4,6,8,12
5.8.3.2 ODT Voltage and Temperature Sensitivity
Min
0
0
dRTTdT
dRTTdV
Max
1.5
0.15
Unit
%/°C
%/mV
Note: These parameters may not be subject to production test. They are verified by design and characterization
5.9 ODT Timing Definitions
5.9.1 Test Load for ODT Timings
Different than for timing measurements, the reference load for ODT timings is defined in the following figure.
VDDQ
DUT
CK,CK#
DQ,DM
DQS,
DQS#,
TDQS,
TDQS#
25ohm
VTT=VSSQ
VSSQ
Timing Reference Point
Figure 5.9.1 ODT Timing Reference Load
5.9.2 ODT Timing Definitions
Definitions for tAON, tAONPD, tAOF, tAOFPD, and tADC are provided in the following table and subsequent figures.
Symbol
tAON
tAONPD
tAOF
tAOFPD
tADC
Begin Point Definition
Rising edge of CK - CK defined by the end point of ODTLon
Rising edge of CK - CK with ODT being first registered high
Rising edge of CK - CK defined by the end point of ODTLoff
Rising edge of CK - CK with ODT being first registered low
Rising edge of CK - CK defined by the end point of ODTLcnw,
ODTLcwn4, or ODTLcwn8
End Point Definition
Extrapolated point at VSSQ
Extrapolated point at VSSQ
End point: Extrapolated point at VRTT_Nom
End point: Extrapolated point at VRTT_Nom
End point: Extrapolated point at VRTT_Wr and
VRTT_Nom respectively
Reference Settings for ODT Timing Measurements
Measured Parameter
tAON
tAONPD
tAOFPD
tADC
DDR3
DDR3L
RTT_Nom Setting
RZQ/4
RZQ/12
RZQ/4
RZQ/12
RZQ/4
RZQ/12
RZQ/12
RZQ/12
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RTT_Wr Setting
NA
NA
NA
NA
NA
NA
RZQ/2
RZQ/2
VSW1[V]
0.05
0.10
0.05
0.10
0.05
0.10
0.20
0.20
VSW2[V]
0.10
0.20
0.10
0.20
0.10
0.20
0.30
0.25
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Figure 5.9.2.1 Definition of tAON
Begin Point : Rising edge of CK-CK#
defined by the end of ODTLon
CK
VTT
CK#
tAON
Tsw2
Tsw1
DQ,DM,DQS,
DQS#,TDQS,
TDQS#
Vsw2
Vsw1
VSSQ
End Point : Extrapolated point at VSSQ
Figure 5.9.2.2 Definition of tAONPD
Begin Point : Rising edge of CK-CK# with
ODT being first register high
CK
VTT
CK#
tAONPD
Tsw2
Tsw1
DQ,DM,DQS,
DQS#,TDQS,
TDQS#
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Vsw1
VSSQ
End Point : Extrapolated point at VSSQ
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Figure 5.9.2.3 Definition of tAOF
Begin Point : Rising edge of CK-CK# with
defined by the end point of ODTLoff
CK
VTT
CK#
tAOF
VRTT
NOM
End Point : Extrapolated point at VRTT_NOM
Tsw2
DQ,DM,DQS,
DQS#,TDQS,
TDQS#
Tsw1
Vsw2
Vsw1
VSSQ
Figure 5.9.2.4 Definition of tAOFPD
Begin Point : Rising edge of CK-CK# with
ODT being first registered low
CK
VTT
CK#
tAOFPD
VRTT_NOM
End Point : Extrapolated point at VRTT_NOM
Tsw2
DQ,DM,DQS,
DQS#,TDQS,
TDQS#
Tsw1
Vsw2
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VSSQ
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Figure 5.9.2.5 Definition of tADC
Begin Point : Rising edge of CK-CK#
defined by the end point of ODTLcnw
Begin Point : Rising edge of CK-CK# defined by
the end point of ODTLcwn4 or ODTLcwn8
CK
VTT
CK#
tADC
tADC
VRTT_NOM
Tsw21
DQ,DM,DQS,
DQS#,TDQS,
TDQS#
End Point : Extrapolated
point at VRTT_NOM
Tsw11
Tsw22
Vsw2
Tsw12
VRTT_Wr
Vsw1
End Point : Extrapolated point at VRTT_Wr
VSSQ
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6. INPUT / OUTPUT CAPACITANCE
Symbol
Parameter
DDR3/
DDR3L-800
DDR3/
DDR3L -1066
DDR3/
DDR3L -1333
DDR3/
DDR3L -1600
DDR3/
DDR3L -1866
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
1.5
3
1.5
3
1.5
2.5
1.5
1.5
1.4
2.2
1.5
2.5
1.5
2.5
1.5
2.3
1.5
1.5
1.4
2.2
0.8
1.6
0.8
1.6
0.8
1.4
0.8
1.4
0.8
Units
Notes
pF
1,2,3
1.3
pF
2,3
CCK
Input/output capacitance
DDR3
(DQ, DM,
DQS,DQS#,TDQS,
DDR3L
TDQS#)
Input capacitance, CK and CK#
CDCK
Input capacitance delta, CK and CK#
0
0.15
0
0.15
0
0.15
0
0.15
0
0.15
pF
2,3,4
CDDQS
Input/output capacitance delta, DQS
and DQS#
0
0.2
0
0.2
0
0.15
0
0.15
0
0.15
pF
2,3,5
DDR3
0.75
1.35
0.75
1.35
0.75
1.3
0.75
0.75
0.75
1.2
pF
2,3,7,8
DDR3L
0.75
1.3
0.75
1.3
0.75
1.3
0.75
0.75
0.75
1.2
-0.5
0.3
-0.5
0.3
-0.4
0.2
-0.4
0.2
-0.4
0.2
pF
2,3,7,8
-0.5
0.5
-0.5
0.5
-0.4
0.4
-0.4
0.4
-0.4
0.4
pF
2,3,9,10
CIO
CI
CDI_CTRL
CDI_ADD_
CMD
Input capacitance, CTRL,
ADD, command inputonly pins
Input capacitance delta, all CTRL
input-only pins
Input capacitance delta, all
ADD/CMD input-only pins
CDIO
Input/output capacitance delta, DQ,
DM, DQS, DQS# TDQS,TDQS#
-0.5
0.3
-0.5
0.3
-0.5
0.3
-0.5
0.3
-0.5
0.3
pF
2,3,11
CZQ
Input/output capacitance of ZQ pin
-
3
-
3
-
3
-
3
-
3
pF
2,3,12
Notes:
1. Although the DM, TDQS and TDQS# pins have different functions, the loading matches DQ and DQS
2. This parameter is not subject to production test. It is verified by design and characterization. VDD=VDDQ=1.5V, VBIAS=VDD/2 and on-die
termination off.
3. This parameter applies to monolithic devices only; stacked/dual-die devices are not covered here
4. Absolute value of CCK-CCK#
5. Absolute value of CIO(DQS)-CIO(DQS#)
6. CI applies to ODT, CS#, CKE, A0-A13, BA0-BA2, RAS#,CAS#,WE#.
7. CDI_CTRL applies to ODT, CS# and CKE
8. CDI_CTRL=CI(CTRL)-0.5*(CI(CK)+CI(CK#))
9. CDI_ADD_CMD applies to A0-A13, BA0-BA2, RAS#, CAS# and WE#
10. CDI_ADD_CMD=CI(ADD_CMD) - 0.5*(CI(CK)+CI(CK#))
11. CDIO=CIO(DQ,DM) - 0.5*(CIO(DQS)+CIO(DQS#))
12. Maximum external load capacitance on ZQ pin: 5 pF.
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7. IDD SPECIFICATIONS AND MEASUREMENT CONDITIONS
IDD Specifications (x8), 1.5 Operation Voltage
Symbol
DDR3-1333
DDR3-1600
Unit
Max.
85
Max.
90
mA
Parameter/Condition
IDD0
Operating Current 0
-> One Bank Activate-> Precharge
IDD1
Operating Current 1
-> One Bank Activate-> Read->
Precharge
110
115
mA
IDD2P0
Precharge Power-Down Current
Slow Exit - MR0 bit A12 = 0
14
14
mA
IDD2P1
Precharge Power-Down Current
Fast Exit - MR0 bit A12 = 1
39
42
mA
IDD2PQ
Precharge Quiet Standby Current
50
55
mA
IDD2N
IDD3P
Precharge Standby Current
Active Power-Down Current
Always Fast Exit
Active Standby Current
Operating Current Burst Read
Operating Current Burst Write
Burst Refresh Current
Self-Refresh Current Normal
Temperature Range (0-85°C)
Self-Refresh Current: extended
temperature range
50
39
55
43
mA
mA
55
162
180
130
12
60
190
205
136
12
mA
mA
mA
mA
mA
14
14
mA
All Bank Interleave Read Current
275
300
mA
IDD3N
IDD4R
IDD4W
IDD5B
IDD6
IDD6ET
IDD7
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IDD Specifications (x16), 1.5 Operation Voltage
DDR3-1066
Symbol
DDR3-1333
DDR3-1600
DDR3-1866
Parameter/Condition
Unit
Max.
Max.
Max.
Max.
IDD0
Operating Current 0
-> One Bank Activate-> Precharge
85
95
100
105
mA
IDD1
Operating Current 1
-> One Bank Activate-> Read->
Precharge
110
115
120
130
mA
IDD2P0
Precharge Power-Down Current
Slow Exit - MR0 bit A12 = 0
15
15
15
17
mA
IDD2P1
Precharge Power-Down Current
Fast Exit - MR0 bit A12 = 1
35
40
45
50
mA
IDD2PQ
Precharge Quiet Standby Current
45
50
55
60
mA
IDD2N
Precharge Standby Current
45
50
55
60
mA
IDD3P
Active Power-Down Current
Always Fast Exit
35
40
45
50
mA
IDD3N
Active Standby Current
50
55
60
65
mA
IDD4R
Operating Current Burst Read
150
175
195
200
mA
IDD4W
Operating Current Burst Write
165
190
210
225
mA
IDD5B
Burst Refresh Current
105
110
120
130
mA
IDD6
Self-Refresh Current Normal
Temperature Range (0-85°C)
15
15
15
17
mA
IDD6ET
Self-Refresh Current: extended
temperature range
18
18
18
20
mA
IDD7
All Bank Interleave Read Current
270
290
320
340
mA
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IDD Specifications (x8), 1.35 Operation Voltage
DDR3L-1333
DDR3L-1600
Max.
Max.
80
85
mA
Operating Current 1
-> One Bank Activate-> Read->
Precharge
110
115
mA
IDD2P0
Precharge Power-Down Current
Slow Exit - MR0 bit A12 = 0
14
14
mA
IDD2P1
Precharge Power-Down Current
Fast Exit - MR0 bit A12 = 1
35
39
mA
47
50
mA
50
55
mA
35
40
mA
50
158
176
129
50
178
198
132
mA
mA
mA
mA
12
12
mA
Symbol
Parameter/Condition
IDD0
Operating Current 0
-> One Bank Activate->
Precharge
IDD1
IDD2PQ
IDD2N
IDD3P
IDD3N
IDD4R
IDD4W
IDD5B
IDD6
Precharge Quiet Standby
Current
Precharge Standby Current
Active Power-Down Current
Always Fast Exit
Active Standby Current
Operating Current Burst Read
Operating Current Burst Write
Burst Refresh Current
Self-Refresh Current Normal
Temperature Range (0-85°C)
Unit
IDD6ET
Self-Refresh Current: extended
temperature range
14
14
mA
IDD7
All Bank Interleave Read Current
265
285
mA
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IDD Specifications (x16), 1.35 Operation Voltage
DDR3L-1333
DDR3L-1600
Max.
Max.
90
95
mA
Operating Current 1
-> One Bank Activate-> Read->
Precharge
110
115
mA
IDD2P0
Precharge Power-Down Current
Slow Exit - MR0 bit A12 = 0
15
15
mA
IDD2P1
Precharge Power-Down Current
Fast Exit - MR0 bit A12 = 1
40
45
mA
IDD2PQ
Precharge Quiet Standby Current
50
55
mA
IDD2N
Precharge Standby Current
Active Power-Down Current
Always Fast Exit
Active Standby Current
Operating Current Burst Read
Operating Current Burst Write
Burst Refresh Current
Self-Refresh Current Normal
Temperature Range (0-85°C)
50
55
mA
35
40
mA
50
165
180
105
55
190
205
110
mA
mA
mA
mA
15
15
mA
Symbol
Parameter/Condition
IDD0
Operating Current 0
-> One Bank Activate-> Precharge
IDD1
IDD3P
IDD3N
IDD4R
IDD4W
IDD5B
IDD6
Unit
IDD6ET
Self-Refresh Current: extended
temperature range
18
18
mA
IDD7
All Bank Interleave Read Current
280
310
mA
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8. ELECTRICAL CHARACTERISTICS AND AC TIMING FOR DDR3-800 TO DDR3-1600
8.1 Clock Specification
The jitter specified is a random jitter meeting a Gaussian distribution. Input clocks violating the min/max values may result
in malfunction of the DDR3 SDRAM device.
8.1.1 Definition for tCK(avg)
tCK(avg) is calculated as the average clock period across any consecutive 200 cycle window, where each clock period is
calculated from rising edge to rising edge.
tCK(avg) = (
tCKj ) / N
Where N=200
8.1.2 Definition for tCK(abs)
tCK(abs) is defind as the absolute clock period, as measured from one rising edge to the next consecutive rising edge.
tCK(abs) is not subject to production test.
8.1.3 Definition for tCH(avg) and tCL(avg)
tCH(avg) is defined as the average high pulse width, as calculated across any consecutive 200 high pulses:
tCH(avg) = (
tCHj ) / (N x tCK(avg)
Where N=200
tCL(avg) is defined as the average low pulse width, as calculated across any consecutive 200 low pulses:
tCL(avg) = (
tCLj ) / (N x tCK(avg)
Where N=200
8.1.4 Definition for note for tJIT(per), tJIT(per, Ick)
tJIT(per) is defined as the largest deviation of any single tCK from tCK(avg).
tJIT(per) = min/max of {tCKi-tCK(avg) where i=1 to 200}
tJIT(per) defines the single period jitter when the DLL is already locked.
tJIT(per,lck) uses the same definition for single period jitter, during the DLL locking period only.
tJIT(per) and tJIT(per,lck) are not subject to production test.
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8.1.5 Definition for tJIT(cc), tJIT(cc, Ick)
tJIT(cc) is defined as the absolute difference in clock period between two consecutive clock cycles: tJIT(cc) = Max of
{tCKi+1-tCKi}
tJIT(cc) defines the cycle to cycle jitter when the DLL is already locked.
tJIT(cc,lck) uses the same definition for cycle to cycle jitter, during the DLL locking period only.
tJIT(cc) and tJIT(cc,lck) are not subject to production test.
8.1.6 Definition for tERR(nper)
tERR is defined as the cumulative error across n multiple consecutive cycles from tCK(avg). tERR is not subject to
production test.
8.2 Refresh Parameters
Refresh parameters
(1)
Parameter
Symbol
All Bank Refresh to active/refresh cmd time
tRFC
Average periodic refresh interval
Notes:
1.
tREFI
-40°C < TCASE < 85°C
85°C < TCASE < 105°C
Units
110
ns
7.8
3.9
μs
μs
The permissible Tcase operating temperature is specified by temperature grade. The maximum Tcase is 95 C unless A2 grade, for which the
maximum is 105˚C. Refer to 3.2 Component Operating Temperature Range.
8.3 Speed Bins and CL, tRCD, tRP, tRC and tRAS for corresponding Bin
DDR3-1066MT/s
Speed Bin
CL-nRCD-nRP
Parameter
Internal read command to first data
ACT to internal read or write delay time
PRE command period
ACT to ACT or REF command period
ACT to PRE command period
CWL =5
CL=5
CWL=6
CWL =5
CL=6
CWL=6
CWL =5
CL=7
CWL=6
CWL =5
CL=8
CWL=6
Supported CL Settings
Supported CWL Settings
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
Symbol
tAA
tRCD
tRP
tRC
tRAS
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
DDR3/DDR3L-1066
7-7-7 (-187F)
Min
Max
13.125
20.000
13.125
13.125
50.625
37.500
9*tREFI
3.000
3.300
Reserved
2.500
3.300
Reserved
Reserved
1.875
<2.5
Reserved
1.875
<2.5
5,6,7,8
5,6
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
nCK
nCK
54
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
DDR3-1333MT/s
Speed Bin
CL-nRCD-nRP
Parameter
Internal read command to first data
ACT to internal read or write delay
PRE command period
ACT to ACT or REF period
ACT to PRE command period
CWL =5
CL=5
CWL=6
CWL=7
CWL =5
CL=6
CWL=6
CWL=7
CWL =5
CL=7
CWL=6
CWL=7
CWL =5
CL=8
CWL=6
CWL=7
CWL=5
CL=9
CWL=6
CWL=7
CWL =5
CL=10
CWL=6
CWL=7
Supported CL Settings
Supported CWL Settings
Symbol
tAA
tRCD
tRP
tRC
tRAS
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
DDR3/DDR3L-1333
9-9-9 (-15H)
Min
Max
13.125
20
13.125
13.125
49.125
36.0
9*tREFI
3.0
3.3
Reserved
Reserved
2.5
3.3
Reserved
Reserved
Reserved
1.875
<2.5
Reserved
Reserved
1.875
<2.5
Reserved
Reserved
Reserved
1.5
<1.875
Reserved
Reserved
1.5
<1.875
5,6,7,8,9,10
5,6,7
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
nCK
nCK
Note : -15H is backward compatible with slower speed options.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
55
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
DDR3-1333MT/s
Speed Bin
CL-nRCD-nRP
Parameter
Internal read command to first data
ACT to internal read or write delay
PRE command period
ACT to ACT or REF period
ACT to PRE command period
CWL =5
CL=5
CWL=6
CWL=7
CWL =5
CL=6
CWL=6
CWL=7
CWL =5
CL=7
CWL=6
CWL=7
CWL =5
CL=8
CWL=6
CWL=7
CWL=5
CL=9
CWL=6
CWL=7
CWL =5
CL=10
CWL=6
CWL=7
Supported CL Settings
Supported CWL Settings
Symbol
tAA
tRCD
tRP
tRC
tRAS
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
DDR3/DDR3L-1333
8-8-8 (-15G)
Min
Max
12.0
20
12.0
12.0
48.0
36.0
9*tREFI
2.5
3.3
Reserved
Reserved
2.5
3.3
Reserved
Reserved
Reserved
1.875
<2.5
Reserved
Reserved
1.875
<2.5
1.5
1.875
Reserved
Reserved
1.5
<1.875
Reserved
Reserved
1.5
<1.875
5,6,7,8,9,10
5,6,7
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
nCK
nCK
Note : -15G is backward compatible with slower speed options.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
56
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
DDR3-1600MT/s
Speed Bin
CL-nRCD-nRP
Parameter
Internal read command to first data
ACT to internal read or write delay
PRE command period
ACT to ACT or REF period
ACT to PRE command period
CWL =5
CWL=6
CL=5
CWL=7
CWL=8
CWL =5
CWL=6
CL=6
CWL=7
CWL=8
CWL =5
CWL=6
CL=7
CWL=7
CWL=8
CWL =5
CWL=6
CL=8
CWL=7
CWL=8
CWL =5
CWL=6
CL=9
CWL=7
CWL=8
CWL =5
CWL=6
CL=10
CWL=7
CWL =8
CWL =5
CWL= 6
CL=11
CWL= 7
CWL =8
Supported CL Settings
Supported CWL Settings
Symbol
tAA
tRCD
tRP
tRC
tRAS
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
DDR3/DDR3L-1600
10-10-10 (-125J)
Min
Max
12.5
20
12.5
12.5
47.5
35
9*tREFI
2.5
3.3
Reserved
Reserved
Reserved
2.5
3.3
Reserved
Reserved
Reserved
Reserved
1.875
<2.5
Reserved
Reserved
Reserved
1.875
<2.5
Reserved
Reserved
Reserved
Reserved
1.5
<1.875
Reserved
Reserved
Reserved
1.5
<1.875
1.25
<1.5
Reserved
Reserved
Reserved
1.25
<1.5
5,6,7,8,9,10,11
5,6,7,8
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
nCK
nCK
Note : -125J is backward compatible with slower speed options, except -15G when VDD/VDDQ = 1.35V.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
57
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
DDR3-1866MT/s
Speed Bin
CL-nRCD-nRP
Parameter
Internal read command to first data
ACT to internal read or write delay
PRE command period
ACT to ACT or REF period
ACT to PRE command period
CWL =5
CWL=6
CL=5
CWL=7
CWL=8,9
CWL =5
CWL=6
CL=6
CWL=7
CWL=8,9
CWL =5
CWL=6
CL=7
CWL=7
CWL=8,9
CWL =5
CWL=6
CL=8
CWL=7
CWL=8,9
CWL =5
CWL=6
CL=9
CWL=7
CWL=8,9
CWL =5
CWL=6
CL=10
CWL=7
CWL =8,9
CWL =5,6
CWL=7
CL=11
CWL=8
CWL =9
CWL=5,6,
CL=12
7,8,9
CWL=5,6,
7,8
CL=13
CWL =9
Supported CL Settings
Supported CWL Settings
Symbol
tAA
tRCD
tRP
tRC
tRAS
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
tCK(AVG)
DDR3/DDR3L-1866
13-13-13 (-107M)
Min
Max
13.91
20
13.91
13.91
47.91
34
9*tREFI
Reserved
Reserved
Reserved
Reserved
2.5
3.3
Reserved
Reserved
Reserved
Reserved
1.875
<2.5
Reserved
Reserved
Reserved
1.875
<2.5
Reserved
Reserved
Reserved
Reserved
1.5
<1.875
Reserved
Reserved
Reserved
1.5
<1.875
Reserved
Reserved
Reserved
1.25
<1.5
Reserved
tCK(AVG)
Reserved
ns
tCK(AVG)
Reserved
ns
tCK(AVG)
1.07
<1.25
5,6,7,8,9,10,11,12,13
5,6,7,8,9
ns
nCK
nCK
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Note : -107M is backward compatible with slower speed options, except -15G when VDD, VDDQ = 1.35V
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
58
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9. ELECTRICAL CHARACTERISTICS & AC TIMING
9.1 Timing Parameter by Speed Bin (DDR3-800, DDR3-1066)
DDR3/DDR3L-800
Min.
Max.
DDR3/DDR3L-1066
Min.
Max.
Parameter
Symbol
Clock Timing
Minimum Clock Cycle Time (DLL off mode)
Average Clock Period
Average high pulse width
Average low pulse width
tCK(DLL_OFF)
tCK(avg)
tCH(avg)
tCL(avg)
Absolute Clock Period
tCK(abs)
Absolute clock HIGH pulse width
Absolute clock LOW pulse width
Clock Period Jitter
Clock Period Jitter during DLL locking period
Cycle to Cycle Period Jitter
Cycle to Cycle Period Jitter during DLL locking
period
Duty Cycle Jitter
Cumulative error across 2 cycles
Cumulative error across 3 cycles
Cumulative error across 4 cycles
Cumulative error across 5 cycles
Cumulative error across 6 cycles
Cumulative error across 7 cycles
Cumulative error across 8 cycles
Cumulative error across 9 cycles
Cumulative error across 10 cycles
Cumulative error across 11 cycles
Cumulative error across 12 cycles
tCH(abs)
tCL(abs)
JIT(per)
JIT(per, lck)
tJIT(cc)
8
Refer to Standard Speed Bins
0.47
0.53
0.47
0.53
0.47
0.53
0.47
0.53
Min.: tCK(avg)min + tJIT(per)min
Max.: tCK(avg)max + tJIT(per)max
0.43
0.43
0.43
0.43
-100
100
-90
90
-90
90
-80
80
200
200
180
180
JIT(cc, lck)
180
Cumulative error across n = 13, 14 . . . 49, 50
cycles
Data Timing
DQS, DQS# to DQ skew, per group, per
access
DQ output hold time from DQS, DQS#
DQ low-impedance time from CK, CK#
DQ high impedance time from CK, CK#
Data setup time to DQS, DQS# referenced to
Vih(ac) / Vil(ac) levels
Data setup time to DQS, DQS# referenced to
Vih(ac) / Vil(ac) levels
Data hold time from DQS, DQS# referenced
to Vih(dc) / Vil(dc) levels
DQ and DM Input pulse width for each input
Data Strobe Timing
DQS,DQS# differential READ Preamble
DQS, DQS# differential READ Postamble
DQS, DQS# differential output high time
DQS, DQS# differential output low time
DQS, DQS# differential WRITE Preamble
tJIT(duty)
tERR(2per)
tERR(3per)
tERR(4per)
tERR(5per)
tERR(6per)
tERR(7per)
tERR(8per)
tERR(9per)
tERR(10per)
tERR(11per)
tERR(12per)
tERR(nper)
8
180
160
160
-147
147
-132
132
-175
175
-157
157
-194
194
-175
175
-209
209
-188
188
-222
222
-200
200
-232
232
-209
209
-241
241
-217
217
-249
249
-224
224
-257
257
-231
231
-263
263
-237
237
-269
269
-242
242
tERR(nper)min = (1 + 0.68ln(n)) * tJIT(per)min
tERR(nper)max = (1 + 0.68ln(n)) *
tJIT(per)max
Units
Notes
ns
ps
tCK(avg)
tCK(avg)
6
ps
tCK(avg)
tCK(avg)
ps
ps
ps
25
26
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
24
tDQSQ
-
200
-
150
ps
13
tQH
tLZ(DQ)
tHZ(DQ)
0.38
-800
-
400
400
0.38
-600
-
300
300
tCK(avg)
ps
ps
13,g
13,14,f
13,14,f
ps
d,17
ps
d,17
ps
d,17
tDS(base)
AC175 or AC160
tDS(base)
AC150 or AC135
tDH(base)
DC100 or DC90
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
See table for Data Setup and Hold
tDIPW
600
-
490
-
ps
28
tRPRE
tRPST
tQSH
tQSL
tWPRE
0.9
0.3
0.38
0.38
0.9
Note 19
Note 11
-
0.9
0.3
0.38
0.38
0.9
Note 19
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
13,19,g
11,13,g
13,g
13,g
Note 11
-
59
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Parameter
Symbol
DQS, DQS# differential WRITE Postamble
DQS, DQS# rising edge output access time
from rising CK, CK#
DQS and DQS# low-impedance time
(Referenced from RL - 1)
DQS and DQS# high-impedance time
(Referenced from RL + BL/2)
DQS, DQS# differential input low pulse width
DQS, DQS# differential input high pulse width
DQS, DQS# rising edge to CK, CK# rising
edge
DQS, DQS# falling edge setup time to CK,
CK# rising edge
DQS, DQS# falling edge hold time from CK,
CK# rising edge
Command and Address Timing
DLL locking time
Internal READ Command to PRECHARGE
Command delay
tWPST
Units
Notes
tCK(avg)
-400
400
-300
300
ps
13,f
tLZ(DQS)
-800
400
-600
300
ps
13,14,f
tHZ(DQS)
-
400
-
300
ps
13,14,f
tDQSL
tDQSH
0.45
0.45
0.55
0.55
0.45
0.45
0.55
0.55
tCK(avg)
tCK(avg)
29,31
30,31
tDQSS
-0.25
0.25
-0.25
0.25
tCK(avg)
c
tDSS
0.2
-
0.2
-
tCK(avg)
c,32
tDSH
0.2
-
0.2
-
tCK(avg)
c,32
tDLLK
512
-
nCK
tRTP
tWTR
tWR
tMRD
Mode Register Set command update delay
tMOD
ACT to internal read or write delay time
PRE command period
ACT to ACT or REF command period
CAS# to CAS# command delay
tRCD
tRP
tRC
tCCD
tDAL(min)
tMPRR
tRAS
Multi-Purpose Register Recovery Time
ACTIVE to PRECHARGE command period
ACTIVE to ACTIVE command period for 1KB
page size
ACTIVE to ACTIVE command period for 2KB
page size
Four activate window for 1KB page size
Four activate window for 2KB page size
Command and Address setup time to CK,
CK# referenced to Vih(ac) / Vil(ac) levels
Command and Address setup time to CK,
CK# referenced to Vih(ac) / Vil(ac) levels
Command and Address hold time from CK,
CK# referenced to Vih(dc) / Vil(dc) levels
Control and Address Input pulse width for
each input
Calibration Timing
DDR3/DDR3L-1066
Min.
Max.
0.3
-
tDQSCK
Delay from start of internal write transaction to
internal read command
WRITE recovery time
Mode Register Set command cycle time
Auto precharge write recovery + precharge time
DDR3/DDR3L-800
Min.
Max.
0.3
-
tRRD
tRRD
tFAW
tFAW
tIS(base)
AC175 or AC160
tIS(base)
AC150 or AC135
tIH(base)
DC100 or DC90
tIPW
Power-up and RESET calibration time
tZQinit
Normal operation Full calibration time
tZQoper
Normal operation Short calibration time
tZQCS
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
512
tRTPmin.: max(4nCK, 7.5ns)
tRTPmax.: tWTRmin.: max(4nCK, 7.5ns)
tWTRmax.:
15
15
4
4
tMODmin.: max(12nCK, 15ns)
tMODmax.:
Standard Speed Bins
Standard Speed Bins
Standard Speed Bins
4
4
WR + roundup(tRP / tCK(avg))
1
1
Standard Speed Bins
max(4nCK,
max(4nCK,
10ns)
7.5ns)
tRRDmin.: max(4nCK, 10ns)
tRRDmax.:
40
37.5
50
50
e
e,18
-
max (512
nCK, 640ns)
max (256
nCK, 320ns)
max (64
nCK, 80ns)
-
-
780
max (512
nCK, 640ns)
max (256
nCK, 320ns)
max (64
nCK, 80ns)
e,18
e
e
e
-
nCK
nCK
nCK
22
e
-
e
e
-
See table for ADD/CMD setup and hold
900
ns
nCK
-
ns
ns
e
e
ps
b,16
ps
b,16,27
ps
b,16
ps
28
-
23
60
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Parameter
Symbol
Reset Timing
Exit Reset from CKE HIGH to a valid
command
Self Refresh Timings
Exit Self Refresh to commands not requiring a
locked DLL
tXPR
tXS
Exit Self Refresh to commands requiring a
locked DLL
tXSDLL
Minimum CKE low width for Self Refresh entry
to exit timing
tCKESR
Valid Clock Requirement after Self Refresh
Entry (SRE) or Power-Down Entry (PDE)
Valid Clock Requirement before Self Refresh
Exit (SRX) or Power-Down Exit (PDX) or
Reset Exit
Power Down Timings
Exit Power Down with DLL on to any valid
command; Exit Precharge Power Down with
DLL frozen to commands not requiring a
locked DLL
Exit Precharge Power Down with DLL frozen
to commands requiring a locked DLL
tCKSRE
tCKSRX
DDR3-1066
Min.
Max.
Units
Notes
nCK
2
tXPRmin.: max(5nCK, tRFC(min) + 10ns)
tXPRmax.: tXSmin.: max(5nCK, tRFC(min) + 10ns)
tXSmax.: tXSDLLmin.: tDLLK(min)
tXSDLLmax.: tCKESRmin.: tCKE(min) + 1 nCK
tCKESRmax.: tCKSREmin.: max(5 nCK, 10 ns)
tCKSREmax.: tCKSRXmin.: max(5 nCK, 10 ns)
tCKSRXmax.: tXPmin.: max(3nCK, 7.5ns)
tXP
tXPDLL
CKE minimum pulse width
tCKE
Command pass disable delay
tCPDED
Power Down Entry to Exit Timing
tPD
Timing of ACT command to Power Down
entry
tACTPDEN
Timing of PRE or PREA command to Power
Down entry
tPRPDEN
Parameter
Symbol
Timing of RD/RDA command to Power Down
entry
tRDPDEN
Timing of WR command to Power Down entry
(BL8OTF, BL8MRS, BC4OTF)
tWRPDEN
Timing of WRA command to Power Down
entry (BL8OTF, BL8MRS, BC4OTF)
Timing of WR command to Power Down entry
(BC4MRS)
Timing of WRA command to Power Down
entry (BC4MRS)
DDR3-800
Min.
Max.
tWRAPDEN
tWRPDEN
tWRAPDEN
Timing of REF command to Power Down
entry
tREFPDEN
Timing of MRS command to Power Down
entry
tMRSPDEN
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
tXPmax.: tXPDLLmin.: max(10nCK, 24ns)
tXPDLLmax.: tCKEmin.: max(3nCK
tCKEmin.: max(3nCK
7.5ns)
5.625ns)
tCKEmax.: tCKEmax.: tCPDEDmin.: 1
tCPDEDmax.: -
nCK
tPDmin.: tCKE(min)
tPDmax.: 9*tREFI
tACTPDENmin.: 1
tACTPDENmax.: tPRPDENmin.: 1
tPRPDENmax.: DDR3-800
DDR3-1066
Min.
Max.
Min.
Max.
tRDPDENmin.: RL+4+1
tRDPDENmax.: tWRPDENmin.: WL + 4 + (tWR / tCK(avg))
tWRPDENmax.: tWRAPDENmin.: WL+4+WR+1
tWRAPDENmax.: tWRPDENmin.: WL + 2 + (tWR / tCK(avg))
tWRPDENmax.: tWRAPDENmin.: WL + 2 +WR + 1
tWRAPDENmax.: tREFPDENmin.: 1
tREFPDENmax.: tMRSPDENmin.: tMOD(min)
tMRSPDENmax.: -
15
nCK
20
nCK
20
Units
Notes
nCK
nCK
9
nCK
10
nCK
9
nCK
10
nCK
20,21
61
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Parameter
Symbol
ODT Timings
ODT high time without write command or with
write command and BC4
DDR3-1066
Min.
Max.
ODTH4min.: 4
ODTH4max.: ODTH8min.: 6
ODTH8max.: -
ODTH4
ODT high time with Write command and BL8
Asynchronous RTT turn-on delay (PowerDown with DLL frozen)
Asynchronous RTT turn-off delay (PowerDown with DLL frozen)
RTT turn-on
RTT_Nom and RTT_WR turn-off time from
ODTLoff reference
RTT dynamic change skew
Write Leveling Timings
First DQS/DQS# rising edge after write
leveling mode is programmed
DQS/DQS# delay after write leveling mode is
programmed
Write leveling setup time from rising CK, CK#
crossing to rising DQS, DQS# crossing
Write leveling hold time from rising DQS,
DQS# crossing to rising CK, CK# crossing
Write leveling output delay
Write leveling output error
DDR3-800
Min.
Max.
ODTH8
Units
Notes
nCK
nCK
tAONPD
2
8.5
2
8.5
ns
tAOFPD
2
8.5
2
8.5
ns
tAON
-400
400
-300
300
ps
7,f
tAOF
0.3
0.7
0.3
0.7
tCK(avg)
8,f
tADC
0.3
0.7
0.3
0.7
tCK(avg)
f
tWLMRD
40
-
40
-
nCK
3
tWLDQSEN
25
-
25
-
nCK
3
tWLS
325
-
245
-
ps
tWLH
325
-
245
-
ps
tWLO
tWLOE
0
0
9
2
0
0
9
2
ns
ns
9.2 Timing Parameter by Speed Bin (DDR3-1333, DDR3-1600)
DDR3/DDR3L-1333
Min.
Max.
DDR3/DDR3L-1600
Min.
Max.
Units
Notes
ns
ps
tCK(avg)
tCK(avg)
6
Parameter
Symbol
Clock Timing
Minimum Clock Cycle Time (DLL off mode)
Average Clock Period
Average high pulse width
Average low pulse width
tCK(DLL_OFF)
tCK(avg)
tCH(avg)
tCL(avg)
Absolute Clock Period
tCK(abs)
Absolute clock HIGH pulse width
Absolute clock LOW pulse width
Clock Period Jitter
Clock Period Jitter during DLL locking period
Cycle to Cycle Period Jitter
Cycle to Cycle Period Jitter during DLL
locking period
Duty Cycle Jitter
Cumulative error across 2 cycles
Cumulative error across 3 cycles
Cumulative error across 4 cycles
Cumulative error across 5 cycles
Cumulative error across 6 cycles
Cumulative error across 7 cycles
Cumulative error across 8 cycles
Cumulative error across 9 cycles
Cumulative error across 10 cycles
tCH(abs)
tCL(abs)
JIT(per)
JIT(per, lck)
tJIT(cc)
8
8
Refer to Standard Speed Bins
0.47
0.53
0.47
0.53
0.47
0.53
0.47
0.53
Min.: tCK(avg)min + tJIT(per)min
Max.: tCK(avg)max + tJIT(per)max
0.43
0.43
0.43
0.43
-80
80
-70
70
-70
70
-60
60
160
160
140
140
JIT(cc, lck)
140
140
120
120
ps
tJIT(duty)
tERR(2per)
tERR(3per)
tERR(4per)
tERR(5per)
tERR(6per)
tERR(7per)
tERR(8per)
tERR(9per)
tERR(10per)
-118
-140
-155
-168
-177
-186
-193
-200
-205
118
140
155
168
177
186
193
200
205
-103
-122
-136
-147
-155
-163
-169
-175
-180
103
122
136
147
155
163
169
175
180
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
ps
tCK(avg)
tCK(avg)
ps
ps
ps
62
25
26
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Parameter
Symbol
Cumulative error across 11 cycles
Cumulative error across 12 cycles
tERR(11per)
tERR(12per)
Cumulative error across n = 13, 14 . . . 49, 50
cycles
tERR(nper)
Data Timing
DQS, DQS# to DQ skew, per group, per
access
DQ output hold time from DQS, DQS#
DQ low-impedance time from CK, CK#
DQ high impedance time from CK, CK#
Data setup time to DQS, DQS# referenced to
Vih(ac) / Vil(ac) levels
Data setup time to DQS, DQS# referenced to
Vih(ac) / Vil(ac) levels
DDR3/DDR3L-1333
DDR3/DDR3L-1600
Min.
Max.
Min.
Max.
-210
210
-184
184
-215
215
-188
188
tERR(nper)min = (1 + 0.68ln(n)) * tJIT(per)min
tERR(nper)max = (1 + 0.68ln(n)) *
tJIT(per)max
Units
Notes
ps
ps
ps
24
tDQSQ
-
125
-
100
ps
13
tQH
tLZ(DQ)
tHZ(DQ)
tDS(base)
AC150
tDS(base)
AC135
tDH(base)
DC100 or
DC90
tDIPW
0.38
-500
-
250
250
0.38
-450
-
225
225
tCK(avg)
ps
ps
13,g
13,14,f
13,14,f
ps
d,17
ps
d,17
ps
d,17
400
-
360
ps
28
DQS,DQS# differential READ Preamble
tRPRE
0.9
Note 19
0.9
tCK(avg)
13,19,g
DQS, DQS# differential READ Postamble
tRPST
0.3
Note 11
0.3
tCK(avg)
11,13,g
DQS, DQS# differential output high time
DQS, DQS# differential output low time
DQS, DQS# differential WRITE Preamble
DQS, DQS# differential WRITE Postamble
DQS, DQS# rising edge output access time
from rising CK, CK#
DQS and DQS# low-impedance time
(Referenced from RL - 1)
DQS and DQS# high-impedance time
(Referenced from RL + BL/2)
DQS, DQS# differential input low pulse width
DQS, DQS# differential input high pulse width
tQSH
tQSL
tWPRE
tWPST
0.4
0.4
0.9
0.3
-
0.4
0.4
0.9
0.3
Note
19
Note
11
-
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
13,g
13,g
tDQSCK
-255
255
-225
225
ps
13,f
tLZ(DQS)
-500
250
-450
225
ps
13,14,f
tHZ(DQS)
-
250
-
225
ps
13,14,f
tDQSL
tDQSH
tDQSS
0.45
0.45
-0.25
0.55
0.55
0.25
0.45
0.45
-0.27
0.55
0.55
0.27
tCK(avg)
tCK(avg)
tCK(avg)
29,31
30,31
c
tDSS
0.2
-
0.18
-
tCK(avg)
c,32
tDSH
0.2
-
0.18
-
tCK(avg)
c,32
tDLLK
512
-
nCK
-
ns
nCK
-
nCK
Data hold time from DQS, DQS# referenced
to Vih(dc) / Vil(dc) levels
DQ and DM Input pulse width for each input
Data Strobe Timing
DQS, DQS# rising edge to CK, CK# rising edge
DQS, DQS# falling edge setup time to CK,
CK# rising edge
DQS, DQS# falling edge hold time from CK,
CK# rising edge
Command and Address Timing
DLL locking time
Internal READ Command to PRECHARGE
Command delay
Delay from start of internal write transaction to
internal read command
WRITE recovery time
Mode Register Set command cycle time
tRTP
tWTR
tWR
tMRD
Mode Register Set command update delay
tMOD
ACT to internal read or write delay time
PRE command period
ACT to ACT or REF command period
CAS# to CAS# command delay
tRCD
tRP
tRC
tCCD
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
See table for Data Setup and Hold
512
tRTPmin.: max(4nCK, 7.5ns)
tRTPmax.: tWTRmin.: max(4nCK, 7.5ns)
tWTRmax.:
15
15
4
4
tMODmin.: max(12nCK, 15ns)
tMODmax.:
Standard Speed Bins
Standard Speed Bins
Standard Speed Bins
4
4
-
e,18
63
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Parameter
Symbol
Auto precharge write recovery + precharge time
tDAL(min)
tMPRR
tRAS
Multi-Purpose Register Recovery Time
ACTIVE to PRECHARGE command period
ACTIVE to ACTIVE command period for 1KB
page size
ACTIVE to ACTIVE command period for 2KB
page size
Four activate window for 1KB page size
Four activate window for 2KB page size
Command and Address setup time to CK,
CK# referenced to Vih(ac) / Vil(ac) levels
Command and Address setup time to CK,
CK# referenced to Vih(ac) / Vil(ac) levels
Command and Address hold time from CK,
CK# referenced to Vih(dc) / Vil(dc) levels
Control and Address Input pulse width for
each input
Calibration Timing
tRRD
tRRD
tFAW
tFAW
tIS(base)
AC175 or AC160
tIS(base)
AC150 or AC135
tIH(base)
DC100 or DC90
tIPW
Power-up and RESET calibration time
tZQinit
Normal operation Full calibration time
tZQoper
Normal operation Short calibration time
tZQCS
Reset Timing
Exit Reset from CKE HIGH to a valid
command
Self Refresh Timings
tXPR
Exit Self Refresh to commands not requiring a
locked DLL
tXS
Parameter
Symbol
Exit Self Refresh to commands requiring a
locked DLL
Minimum CKE low width for Self Refresh entry
to exit timing
Valid Clock Requirement after Self Refresh
Entry (SRE) or Power-Down Entry (PDE)
Valid Clock Requirement before Self Refresh
Exit (SRX) or Power-Down Exit (PDX) or
Reset Exit
Power Down Timings
Exit Power Down with DLL on to any valid
command; Exit Precharge Power Down with
DLL frozen to commands not requiring a
locked DLL
Exit Precharge Power Down with DLL frozen
to commands requiring a locked DLL
tXSDLL
tCKESR
tCKSRE
tCKSRX
DDR3/DDR3L-1333
DDR3/DDR3L-1600
Min.
Max.
Min.
Max.
WR + roundup(tRP / tCK(avg))
1
1
Standard Speed Bins
max(4nCK,
max(4nCK,
6ns)
6ns)
tRRDmin.: max(4nCK, 7.5ns)
tRRDmax.:
30
30
45
40
-
See table for ADD/CMD Setup and Hold
620
-
max (512
nCK, 640ns)
max (256
nCK, 320ns)
max (64
nCK, 80ns)
-
560
max (512
nCK, 640ns)
max (256
nCK, 320ns)
max (64
nCK, 80ns)
-
Units
Notes
nCK
nCK
22
e
ns
ns
e
e
ps
b,16
ps
b,16,27
ps
b,16
ps
28
-
23
tXPRmin.: max(5nCK, tRFC(min) + 10ns)
tXPRmax.: tXSmin.: max(5nCK, tRFC(min) + 10ns)
tXSmax.: DDR3/DDR3L-1333
DDR3/DDR3L-1600
Min.
Max.
Min.
Max.
tXSDLLmin.: tDLLK(min)
tXSDLLmax.: tCKESRmin.: tCKE(min) + 1 nCK
tCKESRmax.: tCKSREmin.: max(5 nCK, 10 ns)
tCKSREmax.: tCKSRXmin.: max(5 nCK, 10 ns)
Units
Notes
nCK
2
tCKSRXmax.: tXPmin.: max(3nCK, 6ns)
tXP
tXPDLL
CKE minimum pulse width
tCKE
Command pass disable delay
tCPDED
Power Down Entry to Exit Timing
tPD
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
tXPmax.: tXPDLLmin.: max(10nCK, 24ns)
tXPDLLmax.: tCKEmin.: max(3nCK
tCKEmin.: max(3nCK
5.625ns)
5ns)
tCKEmax.: tCKEmax.: tCPDEDmin.: 1
tCPDEDmax.: tPDmin.: tCKE(min)
tPDmax.: 9*tREFI
nCK
15
64
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Parameter
Timing of ACT command to Power Down
entry
Timing of PRE or PREA command to Power
Down entry
Timing of RD/RDA command to Power Down
entry
Timing of WR command to Power Down entry
(BL8OTF, BL8MRS, BC4OTF)
Timing of WRA command to Power Down
entry (BL8OTF, BL8MRS, BC4OTF)
Timing of WR command to Power Down entry
(BC4MRS)
Timing of WRA command to Power Down
entry (BC4MRS)
Timing of REF command to Power Down
entry
Timing of MRS command to Power Down
entry
ODT Timings
ODT high time without write command or with
write command and BC4
Symbol
tACTPDEN
tPRPDEN
tRDPDEN
tWRPDEN
tWRAPDEN
tWRPDEN
tWRAPDEN
tREFPDEN
tMRSPDEN
ODTH8
Units
Notes
nCK
20
nCK
20
nCK
nCK
9
nCK
10
nCK
9
nCK
10
nCK
20,21
nCK
nCK
tAONPD
2
8.5
2
8.5
ns
tAOFPD
2
8.5
2
8.5
ns
tAON
-250
250
-225
225
ps
7,f
tAOF
0.3
0.7
0.3
0.7
tCK(avg)
8,f
tADC
0.3
0.7
0.3
0.7
tCK(avg)
f
tWLMRD
40
-
40
-
nCK
3
tWLDQSEN
25
-
25
-
nCK
3
tWLS
195
-
165
-
ps
tWLH
195
-
165
-
ps
tWLO
tWLOE
0
0
9
2
0
0
7.5
2
ns
ns
RTT dynamic change skew
Write Leveling Timings
First DQS/DQS# rising edge after write
leveling mode is programmed
DQS/DQS# delay after write leveling mode is
programmed
Write leveling setup time from rising CK, CK#
crossing to rising DQS, DQS# crossing
Write leveling hold time from rising DQS,
DQS# crossing to rising CK, CK# crossing
Write leveling output delay
Write leveling output error
ODTH4min.: 4
ODTH4max.: ODTH8min.: 6
ODTH8max.: -
ODTH4
ODT high time with Write command and BL8
Asynchronous RTT turn-on delay (PowerDown with DLL frozen)
Asynchronous RTT turn-off delay (PowerDown with DLL frozen)
RTT turn-on
RTT_Nom and RTT_WR turn-off time from
ODTLoff reference
DDR3/DDR3L-1333
DDR3/DDR3L-1600
Min.
Max.
Min.
Max.
tACTPDENmin.: 1
tACTPDENmax.: tPRPDENmin.: 1
tPRPDENmax.: tRDPDENmin.: RL+4+1
tRDPDENmax.: tWRPDENmin.: WL + 4 + (tWR / tCK(avg))
tWRPDENmax.: tWRAPDENmin.: WL+4+WR+1
tWRAPDENmax.: tWRPDENmin.: WL + 2 + (tWR / tCK(avg))
tWRPDENmax.: tWRAPDENmin.: WL + 2 +WR + 1
tWRAPDENmax.: tREFPDENmin.: 1
tREFPDENmax.: tMRSPDENmin.: tMOD(min)
tMRSPDENmax.: -
9.3 Timing Parameter by Speed Bin (DDR3-1866, DDR3-2133)
Parameter
Symbol
Clock Timing
Minimum Clock Cycle Time (DLL off mode)
Average Clock Period
Average high pulse width
Average low pulse width
tCK(DLL_OFF)
tCK(avg)
tCH(avg)
tCL(avg)
Absolute Clock Period
tCK(abs)
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
DDR3/DDR3L-1866
Min.
Max.
DDR3-2133
Min.
Max.
8
8
Refer to Standard Speed Bins
0.47
0.53
0.47
0.53
0.47
0.53
0.47
0.53
Min.: tCK(avg)min + tJIT(per)min
Max.: tCK(avg)max + tJIT(per)max
Units
Notes
ns
ps
tCK(avg)
tCK(avg)
6
ps
65
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Parameter
Symbol
Absolute clock HIGH pulse width
Absolute clock LOW pulse width
Clock Period Jitter
Clock Period Jitter during DLL locking period
Cycle to Cycle Period Jitter
Cycle to Cycle Period Jitter during DLL
locking period
Duty Cycle Jitter
Cumulative error across 2 cycles
Cumulative error across 3 cycles
Cumulative error across 4 cycles
Cumulative error across 5 cycles
Cumulative error across 6 cycles
Cumulative error across 7 cycles
Cumulative error across 8 cycles
Cumulative error across 9 cycles
Cumulative error across 10 cycles
Cumulative error across 11 cycles
Cumulative error across 12 cycles
tCH(abs)
tCL(abs)
JIT(per)
JIT(per, lck)
tJIT(cc)
Cumulative error across n = 13, 14 . . . 49, 50
cycles
Data Timing
DQS, DQS# to DQ skew, per group, per
access
DQ output hold time from DQS, DQS#
DQ low-impedance time from CK, CK#
DQ high impedance time from CK, CK#
Data setup time to DQS, DQS# referenced to
Vih(ac) / Vil(ac) levels
JIT(cc, lck)
tJIT(duty)
tERR(2per)
tERR(3per)
tERR(4per)
tERR(5per)
tERR(6per)
tERR(7per)
tERR(8per)
tERR(9per)
tERR(10per)
tERR(11per)
tERR(12per)
tERR(nper)
DDR3/DDR3L-1866
Min.
Max.
0.43
0.43
-60
60
-50
50
120
120
100
100
DDR3/DDR3L-2133
Min.
Max.
0.43
0.43
-50
50
-40
40
100
100
80
80
-88
88
-74
74
-105
105
-87
87
-117
117
-97
97
-126
126
-105
105
-133
133
-111
111
-139
139
-116
116
-145
145
-121
121
-150
150
-125
125
-154
154
-128
128
-158
158
-132
132
-161
161
-134
134
tERR(nper)min = (1 + 0.68ln(n)) * tJIT(per)min
tERR(nper)max = (1 + 0.68ln(n)) *
tJIT(per)max
Units
Notes
tCK(avg)
tCK(avg)
ps
ps
ps
25
26
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
ps
tDQSQ
-
85
-
75
ps
13
tQH
tLZ(DQ)
tHZ(DQ)
tDS(base)
AC135
0.38
-390
-
195
195
0.38
-360
-
180
180
tCK(avg)
ps
ps
13,g
13,14,f
13,14,f
ps
d,17
ps
d,17
ps
d,17
Data setup time to DQS, DQS# referenced to
Vih(ac) / Vil(ac) levels
tDS(base)
AC130
Data hold time from DQS, DQS# referenced
to Vih(dc) / Vil(dc) levels
DQ and DM Input pulse width for each input
Data Strobe Timing
DQS,DQS# differential READ Preamble
DQS, DQS# differential READ Postamble
DQS, DQS# differential output high time
DQS, DQS# differential output low time
DQS, DQS# differential WRITE Preamble
DQS, DQS# differential WRITE Postamble
DQS, DQS# rising edge output access time
from rising CK, CK#
DQS and DQS# low-impedance time
(Referenced from RL - 1)
DQS and DQS# high-impedance time
(Referenced from RL + BL/2)
DQS, DQS# differential input low pulse width
DQS, DQS# differential input high pulse width
DQS, DQS# rising edge to CK, CK# rising
edge
DQS, DQS# falling edge setup time to CK,
CK# rising edge
tDH(base)
DC100 or DC90
See table for Data Setup and Hold
See table for Data Setup and Hold
tDIPW
320
-
280
-
ps
28
tRPRE
tRPST
tQSH
tQSL
tWPRE
tWPST
0.9
0.3
0.4
0.4
0.9
0.3
Note 19
Note 11
-
0.9
0.3
0.4
0.4
0.9
0.3
Note 19
Note 11
-
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
tCK(avg)
13,19,g
11,13,g
13,g
13,g
1
1
tDQSCK
-195
195
-180
180
ps
13,f
tLZ(DQS)
-390
195
-360
180
ps
13,14,f
tHZ(DQS)
-
195
-
180
ps
13,14,f
tDQSL
tDQSH
0.45
0.45
0.55
0.55
0.45
0.45
0.55
0.55
tCK(avg)
tCK(avg)
29,31
30,31
tDQSS
-0.27
0.27
-0.27
0.27
tCK(avg)
c
tDSS
0.18
-
0.18
-
tCK(avg)
c,32
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
66
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
DDR3/DDR3L-1866
Min.
Max.
Parameter
Symbol
DQS, DQS# falling edge hold time from CK,
CK# rising edge
tDSH
0.18
tDLLK
512
Command and Address Timing
DLL locking time
Internal READ Command to PRECHARGE
Command delay
Delay from start of internal write transaction to
internal read command
WRITE recovery time
Mode Register Set command cycle time
tRTP
tWTR
tWR
tMRD
Mode Register Set command update delay
tMOD
ACT to internal read or write delay time
PRE command period
ACT to ACT or REF command period
CAS# to CAS# command delay
Auto precharge write recovery + precharge
time
Multi-Purpose Register Recovery Time
ACTIVE to PRECHARGE command period
ACTIVE to ACTIVE command period for 1KB
page size
ACTIVE to ACTIVE command period for 2KB
page size
Four activate window for 1KB page size
Four activate window for 2KB page size
Command and Address setup time to CK,
CK# referenced to Vih(ac) / Vil(ac) levels
Command and Address setup time to CK,
CK# referenced to Vih(ac) / Vil(ac) levels
Command and Address hold time from CK,
CK# referenced to Vih(dc) / Vil(dc) levels
tRCD
tRP
tRC
tCCD
tRRD
tRRD
tFAW
tFAW
tIS(base)
AC135
tIS(base)
AC125
0.18
512
tRTPmin.: max(4nCK, 7.5ns)
tRTPmax.: tWTRmin.: max(4nCK, 7.5ns)
tWTRmax.:
15
15
4
4
tMODmin.: max(12nCK, 15ns)
tMODmax.:
Standard Speed Bins
Standard Speed Bins
Standard Speed Bins
4
4
tDAL(min)
tMPRR
tRAS
-
DDR3/DDR3L-2133
Min.
Max.
Units
Notes
-
tCK(avg)
c,32
-
nCK
-
ns
nCK
-
nCK
WR + roundup(tRP / tCK(avg))
1
1
Standard Speed Bins
max(4nCK,
max(4nCK,
6ns)
6ns)
tRRDmin.: max(4nCK, 7.5ns)
tRRDmax.:
27
25
35
35
nCK
-
tIPW
-
See table for ADD/CMD setup and hold
Power-up and RESET calibration time
tZQinit
Normal operation Full calibration time
tZQoper
Normal operation Short calibration time
tZQCS
535
max (512
nCK, 640ns)
max (256
nCK, 320ns)
max (64
nCK, 80ns)
-
-
470
max (512
nCK, 640ns)
max (256
nCK, 320ns)
max (64
nCK, 80ns)
nCK
22
-
tIH(base)
DC100 or DC90
Control and Address Input pulse width for each
input
Calibration Timing
e,18
-
e
ns
ns
e
e
ps
b,16
ps
b,16
ps
b,16
ps
28
-
23
Reset Timing
Exit Reset from CKE HIGH to a valid command
Self Refresh Timings
Exit Self Refresh to commands not requiring a
locked DLL
Exit Self Refresh to commands requiring a
locked DLL
Minimum CKE low width for Self Refresh entry to
exit timing
Valid Clock Requirement after Self Refresh Entry
(SRE) or Power-Down Entry (PDE)
tXPR
tXS
tXSDLL
tCKESR
tCKSRE
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tXPRmin.: max(5nCK, tRFC(min) + 10ns)
tXPRmax.: tXSmin.: max(5nCK, tRFC(min) + 10ns)
tXSmax.: tXSDLLmin.: tDLLK(min)
tXSDLLmax.: tCKESRmin.: tCKE(min) + 1 nCK
tCKESRmax.: tCKSREmin.: max(5 nCK, 10 ns)
tCKSREmax.: -
nCK
67
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Parameter
Symbol
Valid Clock Requirement before Self Refresh Exit
(SRX) or Power-Down Exit (PDX) or Reset Exit
tCKSRX
Power Down Timings
Exit Power Down with DLL on to any valid
command; Exit Precharge Power Down with DLL
frozen to commands not requiring a locked DLL
Exit Precharge Power Down with DLL frozen to
commands requiring a locked DLL
DDR3/DDR3L-1866
Min.
Max.
Units
Notes
tCKSRXmin.: max(5 nCK, 10 ns)
tCKSRXmax.: tXPmin.: max(3nCK, 6ns)
tXP
tXPmax.: -
tXPDLL
CKE minimum pulse width
tCKE
Command pass disable delay
tCPDED
Power Down Entry to Exit Timing
tPD
Timing of ACT command to Power Down entry
tACTPDEN
1
tPRPDEN
1
Timing of PRE or PREA command to Power
Down entry
Timing of RD/RDA command to Power Down
entry
Timing of WR command to Power Down entry
(BL8OTF, BL8MRS, BC4OTF)
Timing of WRA command to Power Down entry
(BL8OTF, BL8MRS, BC4OTF)
Timing of WR command to Power Down entry
(BC4MRS)
Timing of WRA command to Power Down entry
(BC4MRS)
DDR3/DDR3L-2133
Min.
Max.
tRDPDEN
tWRPDEN
tWRAPDEN
tWRPDEN
tWRAPDEN
Timing of REF command to Power Down entry
tREFPDEN
Timing of MRS command to Power Down entry
tMRSPDEN
tXPDLLmin.: max(10nCK, 24ns)
tXPDLLmax.: tCKEmin.: max(3nCK 5 ns)
tCKEmax.: tCPDEDmin.: 1
tCPDEDmax.: tPDmin.: tCKE(min)
tPDmax.: 9*tREFI
2
-
2
2
nCK
15
-
nCK
20
-
nCK
20
tRDPDENmin.: RL+4+1
tRDPDENmax.: tWRPDENmin.: WL + 4 + (tWR / tCK(avg))
tWRPDENmax.: tWRAPDENmin.: WL+4+WR+1
tWRAPDENmax.: tWRPDENmin.: WL + 2 + (tWR / tCK(avg))
tWRPDENmax.: tWRAPDENmin.: WL + 2 +WR + 1
tWRAPDENmax.: 1
-
2
-
nCK
nCK
9
nCK
10
nCK
9
nCK
10
nCK
20,21
tMRSPDENmin.: tMOD(min)
tMRSPDENmax.: -
ODT Timings
ODTH4min.: 4
ODT high time without write command or with
write command and BC4
ODTH4
ODT high time with Write command and BL8
ODTH8
Asynchronous RTT turn-on delay (PowerDown with DLL frozen)
Asynchronous RTT turn-off delay (PowerDown with DLL frozen)
RTT turn-on
RTT_Nom and RTT_WR turn-off time from
ODTLoff reference
RTT dynamic change skew
Write Leveling Timings
First DQS/DQS# rising edge after write
leveling mode is programmed
DQS/DQS# delay after write leveling mode is
programmed
Write leveling setup time from rising CK, CK#
crossing to rising DQS, DQS# crossing
Write leveling hold time from rising DQS,
DQS# crossing to rising CK, CK# crossing
Write leveling output delay
Write leveling output error
nCK
ODTH4max.: -
ODTH8min.: 6
ODTH8max.: -
nCK
tAONPD
2
8.5
2
8.5
ns
tAOFPD
2
8.5
2
8.5
ns
tAON
-195
195
-180
180
ps
7,f
tAOF
0.3
0.7
0.3
0.7
tCK(avg)
8,f
tADC
0.3
0.7
0.3
0.7
tCK(avg)
f
tWLMRD
40
-
40
-
nCK
3
tWLDQSEN
25
-
25
-
nCK
3
tWLS
140
-
125
-
ps
tWLH
140
-
125
-
ps
tWLO
tWLOE
0
0
7.5
2
0
0
7.5
2
ns
ns
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IS43/46TR81280A, IS43/46TR81280AL
9.4 Timing Notes
9.4.1 Jitter
Specific Note a
Unit “tCK(avg)” represents the actual tCK(avg) of the input clock under operation. Unit “nCK” represents one clock cycle of
the input clock, counting the actual clock edges. ex) tMRD=4 [nCK] means; if one Mode Register Set command is
registered at Tm, another Mode Register Set command may be registered at Tm+4, even if (Tm+4-Tm) is 4 x tCK(avg) +
tERR(4per), min.
Specific Note b
These parameters are measured from a command/address signal (CKE, CS, RAS, CAS, WE, ODT, BA0, A0, A1, etc)
transition edge to its respective clock signal (CK/CK) crossing. The spec values are not affected by the amount of clock
jitter applied (i.e. tJIT(per), tJIT(cc), etc.), as the setup and hold are relative to the clock signal crossing that latches the
command/address. That is, these parameters should be met whether clock jitter is present or not.
Specific Note c
These parameters are measured from a data strobe signal (DQS(L/U), DQS(L/U)) crossing to its respective clock signal
(CK, CK) crossing. The spec values are not affected by the amount of clock jitter applied (i.e. tJIT(per), tJIT(cc), etc), as
these are relative to the clock signal crossing. That is, these parameters should be met whether clock jitter is present or
not.
Specific Note d
These parameters are measured from a data signal (DM(L/U), DQ(L/U)0, DQ(L/U)1, etc.) transition edge to its respective
data strobe signal (DQS(L/U), DQS(L/U)) crossing.
Specific Note e
For these parameters, the DDR3 SDRAM device supports tnPARAM [nCK] = RU{tPARAM[ns] / tCK(avg)[ns]}, which is in
clock cycles, assuming all input clock jitter specifications are satisfied. For example, the device will support tnRP
=RU{tRP/tCK(avg)}, which is in clock cycles, if all input clock jitter specifications are met. This means: For DDR3-800 6-66, of which tRP = 15ns, the device will support tnRP = RU{tRP/tCK(avg)} = 6, as long as the input clock jitter specifications
are met, i.e. Precharge command at Tm and Active command at Tm+6 is valid even if (Tm+6-Tm) is less than 15ns due to
input clock jitter.
Specific Note f
When the device is operated with input clock jitter, this parameter needs to be derated by the actual tERR(mper), act of
the input clock, where 2 <= m <=12. (output derating are relative to the SDRAM input clock.)
For example, if the measured jitter into a DDR3-800 SDRAM has tERR(mper),act,min = -172ps and tERR(mper),act,max
= 193ps, then tDQSCK,min(derated) = tDQSCK,min - tERR(mper),act,max = -400ps - 193ps = -593ps and
tDQSCK,max(derated) = tDQSCK,max - ERR(mper),act,min = 400ps + 172ps = 572ps. Similarly, tLZ(DQ) for DDR3-800
derates to tLZ(DQ),min(derated) = -800ps - 193ps = -993ps and tLZ(DQ),max(derated) = 400ps + 172ps = 572ps.
(Caution on the min/max usage!)
Note that tERR(mper),act,min is the minimum measured value of tERR(nper) where 2 <= n <= 12, and
tERR(mper),act,max is the maximum measured value of tERR(nper) where 2 <= n <= 12.
Specific Note g
When the device is operated with input clock jitter, this parameter needs to be derated by the actual tJIT(per),act of the
input clock. (output deratings are relative to the SDRAM input clock.) For example, if the measured jitter into a DDR3-800
SDRAM has tCK(avg),act=2500ps, tJIT(per),act,min = -72ps and tJIT(per),act,max = 93ps, then tRPRE,min(derated) =
tRPRE,min + tJIT(per),act,min = 0.9 x tCK(avg),act + tJIT(per),act,min = 0.9 x 2500ps - 72ps = 2178ps. Similarly,
tQH,min(derated) = tQH,min + tJIT(per),act,min = 0.38 x tCK(avg),act + tJIT(per),act,min = 0.38 x 2500ps - 72ps = 878ps.
(Caution on the min/max usage!)
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IS43/46TR81280A, IS43/46TR81280AL
9.4.2 Timing Parameters
1. Actual value dependent upon measurement level definitions.
2. Commands requiring a locked DLL are: READ ( and RAP) are synchronous ODT commands.
3. The max values are system dependent.
4. WR as programmed in mode register.
5. Value must be rouned-up to next higher integer value.
6. There is no maximum cycle time limit besides the need to satisfy the refresh interval, tREFI.
7. For definition of RTT-on time tAON See “Timing Parameters”.
8. For definition of RTT-off time tAOF See “Timing Parameters”.
9. tWR is defined in ns, for calculation of tWRPDEN it is necessary to round up tWR / tCK to the next integer.
10. WR in clock cycles are programmed in MR0.
11. The maximum read postamble is bonded by tDQSCK(min) plus tQSH(min) on the left side and tHZ(DQS)max on the
right side.
12. Output timing deratings are relative to the SDRAM input clock. When the device is operated with input clock jitter, this
parameter needs to be derated by TBD.
13. Value is only valid for RON34.
14. Single ended signal parameter.
15. tREFI depends on TOPER.
16. tIS(base) and tIH(base) values are for 1V/ns CMD/ADD single-ended slew rate and 2V/ns CK, CK differential slew
rate. Note for DQ and DM signals, VREF(DC)=VRefDQ(DC). For input only pins except RESET,
VRef(DC)=VRefCA(DC).
17. tDS(base) and tDH(base) values are for 1V/ns DQ single-ended slew rate and 2V/ns DQS, DQS differential slew rate.
18. Note for DQ and DM signals, VREF(DC)=VRefDQ(DC). For input only pins except RESET, VRef(DC)=VRefCA(DC).
19. Start of internal write transaction is defined as follows:
20. For BL8 (fixed by MRS and on-the-fly): Rising clock edge 4 clock cycles after WL.
21. For BC4 (on-the-fly): Rising clock edge 4 clock cycles after WL.
22. For BC4 (fixed by MRS): Rising clock edge 2 clock cycles after WL.
19. The maximum preamble is bound by tLZ(DQS)max on the left side and tDQSCK(max) on the right side.
20. CKE is allowed to be registered low while operations such as row activation, precharge, autoprecharge or refresh are
in progress, but power-down IDD spec will not be applied until finishing those operations.
21. Although CKE is allowed to be registered LOW after a REFRESH command once tREFPDEN(min) is satisfied, there
are cases where additional time such as tXPDLL(min) is also required.
22. Defined between end of MPR read burst and MRS which reloads MPR or disables MPR function.
23. One ZQCS command can effectively correct a minimum of 0.5% (ZQCorrection) of RON and RTT impedance error
within 64 nCK for all speed bins assuming the maximum sensitivities specified in the “Output Driver Voltage and
Temperature Sensitivity” and “ODT Voltage and Temperature Sensitivity” tables. The appropriate interval between
ZQCS commands can be determined from these tables and other application-specific parameters.
23. One method for calculating the interval between ZQCS commands, given the temperature (Tdriftrate) and voltage
(Vdriftrate) drift rates that the SDRAM is subject to in the application, is illustrated. the interval could be defined by the
following formula:
ZQCorrection / [(TSens x Tdriftrate) + (VSens x Vdriftrate)]
, where TSens = max(dRTTdT, dRONdTM) and VSens = max(dRTTdV, dRONdVM) define the SDRAM temperature and
voltage sensitivities.
For example, if TSens = 1.5%/C, VSens = 0.15%/mV, Tdriftrate = 1 C/sec and Vdriftrate = 15mV/sec, then the interval
between ZQCS commands is calculated as
0.5 / [(1.5x1)+(0.15x15)] = 0.133 ≈ 128ms
24. n = from 13 cycles to 50 cycles. This row defines 38 parameters.
25. tCH(abs) is the absolute instantaneous clock high pulse width, as measured from one rising edge to the following
falling edge.
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26. tCL(abs) is the absolute instantaneous clock low pulse width, as measured from one falling edge to the following
rising edge.
27. The tIS(base) AC150 specifications are adjusted from the tIS(base) specification by adding an additional 100ps of
derating to accommodate for the lower altemate threshold of 150mV and another 25ps to account for the earlier
reference point [(175mV - 150mV) / 1V/ns].
28. Pulse width of a input signal is defined as the width between the first crossing of Vref(dc) and the consecutive
crossing of Vref(dc).
29. tDQSL describes the instantaneous differential input low pulse width on DQS - DQS#, as measured from one falling
edge to the next consecutive rising edge.
30. tDQSH describes the instantaneous differential input high pulse width on DQS - DQS#, as measured from one rising
edge to the next consecutive falling edge.
31. tDQSH,act + tDQSL,act = 1 tCK,act ; with tXYZ,act being the actual measured value of the respective timing
parameter in the application.
32. tDSH,act + tDSS,act = 1 tCK,act ; with tXYZ,act being the actual measured value of the respective timing parameter
in the application.
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IS43/46TR81280A, IS43/46TR81280AL
9.5 Address / Command Setup, Hold and Derating
For all input signals the total tIS (setup time) and tIH (hold time) required is calculated by adding the datasheet tIS(base)
and tIH(base) value to the ∆tIS and ∆tIH derating value, respectively. Example: tIS (total setup time) = tIS(base) + ∆tIS
Setup (tIS) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of VREF(dc) and the
first crossing of VIH(ac)min. Setup (tIS) nominal slew rate for a falling signal is defined as the slew rate between the last
crossing of VREF(dc) and the first crossing of Vil(ac)max. If the actual signal is always earlier than the nominal slew rate
line between shaded ‘VREF(dc) to ac region’, use nominal slew rate for derating value . If the actual signal is later than
the nominal slew rate line anywhere between shaded ‘VREF(dc) to ac region’, the slew rate of a tangent line to the actual
signal from the ac level to VREF (dc) level is used for derating value.
Hold (tIH) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of Vil(dc)max and the
first crossing of VREF(dc). Hold (tIH) nominal slew rate for a falling signal is defined as the slew rate between the last
crossing of Vih(dc)min and the first crossing of VREF(dc). If the actual signal is always later than the nominal slew rate
line between shaded ‘dc to VREF(dc) region’, use nominal slew rate for derating value. If the actual signal is earlier than
the nominal slew rate line anywhere between shaded ‘dc to VREF(dc) region’, the slew rate of a tangent line to the actual
signal from the dc level to VREF (dc) level is used for derating value.
For a valid transition the input signal has to remain above/below VIH/IL(ac) for some time tVAC. Although for slow slew
rates the total setup time might be negative (i.e. a valid input signal will not have reached VIH/IL(ac) at the time of the
rising clock transition, a valid input signal is still required to complete the transition and reach VIH/IL(ac). For slew rates in
between the values listed in the tables, the derating values may obtained by linear interpolation.
These values are typically not subject to production test. They are verified by design and characterization.
9.5.1 ADD/CMD Setup and Hold Base-Values for 1V/ns
DDR3/
DDR3L
DDR3
DDR3L
Symbol
Reference
DDR3800
DDR31066
DDR31333
DDR31600
DDR31866
DDR32133
Units
tIS(base) AC175
VIH/L(ac)
200
125
65
45
-
-
ps
tIS(base) AC150
VIH/L(ac)
350
275
190
170
-
-
ps
tIS(base) AC135
VIH/L(ac)
-
-
-
-
65
60
ps
tIS(base) AC125
VIH/L(ac)
-
-
-
-
150
135
ps
tIH(base) DC100
VIH/L(dc)
275
200
140
120
100
95
ps
tIS(base) AC160
VIH/L(ac)
215
140
80
60
-
-
ps
tIS(base) AC135
VIH/L(ac)
365
290
205
185
65
-
ps
tIS(base) AC125
VIH/L(ac)
-
-
-
-
150
-
ps
tIH(base) DC90
VIH/L(dc)
285
210
150
130
110
-
ps
Note:
(AC/DC referenced for 1V/ns Address/Command slew rate and 2 V/ns differential CK-CK# slew rate)
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9.5.2 Derating values [ps] for DDR3L-800/1066/1333/1600 tIS/tIH - AC/DC based AC160 Threshold
AC160 Threshold -> VIH(ac) = VREF(dc) + 160mV, VIL(ac) = VREF(dc) - 160mV
CK, CK# Differential Slew Rate
DDR3L
CMD/ADD
Slew Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
” tIS
96
” tIH
61
1.4V/ns
” tIS
104
” tIH
69
1.2V/ns
” tIS
112
” tIH
79
1.0V/ns
2
” tIS
80
” tIH
45
” tIS
80
” tIH
45
” tIS
80
” tIH
45
” tIS
88
” tIH
53
” tIS
120
” tIH
95
1.5
53
30
53
30
53
30
61
38
69
46
77
54
85
64
93
80
1
0
0
0
0
0
0
8
8
16
16
24
24
32
34
40
50
0.9
0.8
-1
-3
-3
-8
-1
-3
-3
-8
-1
-3
-3
-8
7
5
5
1
15
13
13
9
23
21
21
17
31
29
31
27
39
37
47
43
0.7
-5
-13
-5
-13
-5
-13
3
-5
11
3
19
11
27
21
35
37
0.6
-8
-20
-8
-20
-8
-20
0
-12
8
-4
16
4
24
14
32
30
0.5
-20
-30
-20
-30
-20
-30
-12
-22
-4
-14
4
-6
12
4
20
20
0.4
-40
-45
-40
-45
-40
-45
-32
-37
-24
-29
-16
-21
-8
-11
0
5
9.5.3 Derating values [ps] for DDR3L-800/1066/1333/1600 tIS/tIH - AC/DC based AC135 Threshold
AC135 Threshold -> VIH(ac) = VREF(dc) + 135mV, VIL(ac) = VREF(dc) - 135mV
CK, CK# Differential Slew Rate
DDR3L
CMD/ADD
Slew Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
” tIS
84
” tIH
61
1.4V/ns
” tIS
92
” tIH
69
1.2V/ns
” tIS
100
” tIH
79
1.0V/ns
2
” tIS
68
” tIH
45
” tIS
68
” tIH
45
” tIS
68
” tIH
45
” tIS
76
” tIH
53
” tIS
108
” tIH
95
1.5
45
30
45
30
45
30
53
38
61
46
69
54
77
64
85
80
1
0
0
0
0
0
0
8
8
16
16
24
24
32
34
40
50
0.9
2
-3
2
-3
2
-3
10
5
18
13
26
21
34
31
42
47
0.8
3
-8
3
-8
3
-8
11
1
19
9
27
17
35
27
43
43
0.7
6
-13
6
-13
6
-13
14
-5
22
3
30
11
38
21
46
37
0.6
9
-20
9
-20
9
-20
17
-12
25
-4
33
4
41
14
49
30
0.5
5
-30
5
-30
5
-30
13
-22
21
-14
29
-6
37
4
45
20
0.4
-3
-45
-3
-45
-3
-45
6
-37
14
-29
22
-21
30
-11
38
5
9.5.4 Derating values [ps] for DDR3L-1866 tIS/tIH - AC/DC based AC125 Threshold
AC125 Threshold -> VIH(ac) = VREF(dc) + 125mV, VIL(ac) = VREF(dc) - 125mV
CK, CK# Differential Slew Rate
DDR3L
CMD/ADD
Slew Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
” tIH
61
” tIS
87
” tIH
69
1.2V/ns
” tIS
95
” tIH
79
1.0V/ns
2
” tIS
63
” tIH
45
” tIS
63
” tIH
45
” tIS
63
” tIH
45
” tIS
71
” tIH
53
1.5
42
30
42
30
42
30
50
38
58
46
66
54
74
64
82
80
1
0
0
0
0
0
0
8
8
16
16
24
24
32
34
40
50
0.9
3
-3
3
-3
3
-3
11
5
19
13
27
21
35
31
43
47
0.8
6
-8
6
-8
6
-8
14
1
22
9
30
17
38
27
46
43
0.7
10
-13
10
-13
10
-13
18
-5
26
3
34
11
42
21
50
37
0.6
16
-20
16
-20
16
-20
24
-12
32
-4
40
4
48
14
56
30
0.5
15
-30
15
-30
15
-30
23
-22
31
-14
39
-6
47
4
55
20
0.4
13
-45
13
-45
13
-45
21
-37
29
-29
37
-21
45
-11
53
5
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
” tIS
79
1.4V/ns
” tIS
103
” tIH
95
73
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9.5.5 Derating values [ps] for DDR3-800/1066/1333/1600 tIS/tIH - AC/DC based AC175 Threshold
AC175 Threshold -> VIH(ac) = VREF(dc) + 175mV, VIL(ac) = VREF(dc) - 175mV
CK, CK# Differential Slew Rate
DDR3
CMD/ADD
Slew Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
” tIS
104
” tIH
66
1.4V/ns
” tIS
112
” tIH
74
1.2V/ns
” tIS
120
” tIH
84
1.0V/ns
2
” tIS
88
” tIH
50
” tIS
88
” tIH
50
” tIS
88
” tIH
50
” tIS
96
” tIH
58
” tIS
128
” tIH
100
1.5
59
34
59
34
59
34
67
42
75
50
83
58
91
68
99
84
1
0
0
0
0
0
0
8
8
16
16
24
24
32
34
40
50
0.9
-2
-4
-2
-4
-2
-4
6
4
14
12
22
20
30
30
38
46
0.8
-6
-10
-6
-10
-6
-10
2
-2
10
6
18
14
26
24
34
40
0.7
-11
-16
-11
-16
-11
-16
-3
-8
5
0
13
8
21
18
29
34
0.6
-17
-26
-17
-26
-17
-26
-9
-18
-1
-10
7
-2
15
8
23
24
0.5
-35
-40
-35
-40
-35
-40
-27
-32
-19
-24
-11
-16
-2
-6
5
10
0.4
-62
-60
-62
-60
-62
-60
-54
-52
-46
-44
-38
-36
-30
-26
-22
-10
9.5.6 Derating values [ps] for DDR3-800/1066/1333/1600 tIS/tIH - AC/DC based AC150 Threshold
AC150 Threshold -> VIH(ac) = VREF(dc) + 150mV, VIL(ac) = VREF(dc) - 150mV
CK, CK# Differential Slew Rate
DDR3
CMD/ADD
Slew Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
1.4V/ns
1.2V/ns
1.0V/ns
2
” tIS
75
” tIH
50
” tIS
75
” tIH
50
” tIS
75
” tIH
50
” tIS
83
” tIH
58
” tIS
91
” tIH
66
” tIS
99
” tIH
74
” tIS
107
” tIH
84
” tIS
115
” tIH
100
1.5
50
34
50
34
50
34
58
42
66
50
74
58
82
68
90
84
1
0
0
0
0
0
0
8
8
16
16
24
24
32
34
40
50
0.9
0
-4
0
-4
0
-4
8
4
16
12
24
20
32
30
40
46
0.8
0
-10
0
-10
0
-10
8
-2
16
6
24
14
32
24
40
40
0.7
0
-16
0
-16
0
-16
8
-8
16
0
24
8
32
18
40
34
0.6
-1
-26
-1
-26
-1
-26
7
-18
15
-10
23
-2
31
8
39
24
0.5
-10
-40
-10
-40
-10
-40
-2
-32
6
-24
14
-16
22
-6
30
10
0.4
-25
-60
-25
-60
-25
-60
-17
-52
-9
-44
-1
-36
7
-26
15
-10
9.5.7 Derating values [ps] for DDR3-1866/2133 tIS/tIH - AC/DC based AC135 Threshold
AC135 Threshold -> VIH(ac) = VREF(dc) + 135mV, VIL(ac) = VREF(dc) - 135mV
CK, CK# Differential Slew Rate
DDR3
CMD/ADD
Slew Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
” tIH
66
” tIS
92
” tIH
74
1.2V/ns
” tIS
100
” tIH
84
1.0V/ns
2
” tIS
68
” tIH
50
” tIS
68
” tIH
50
” tIS
68
” tIH
50
” tIS
76
” tIH
58
1.5
45
34
45
34
45
34
53
42
61
50
69
58
77
68
85
84
1
0
0
0
0
0
0
8
8
16
16
24
24
32
34
40
50
0.9
2
-4
2
-4
2
-4
10
4
18
12
26
20
34
30
42
46
0.8
3
-10
3
-10
3
-10
11
-2
19
6
27
14
35
24
43
40
0.7
6
-16
6
-16
6
-16
14
-8
22
0
30
8
38
18
46
34
0.6
9
-26
9
-26
9
-26
17
-18
25
-10
33
-2
41
8
49
24
0.5
5
-40
5
-40
5
-40
13
-32
21
-24
29
-16
37
-6
45
10
0.4
-3
-60
-3
-60
-3
-60
6
-52
14
-44
22
-36
30
-26
38
-10
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
” tIS
84
1.4V/ns
” tIS
108
” tIH
100
74
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9.5.8 Derating values [ps] for DDR3-1866/2133 tIS/tIH - AC/DC based AC125 Threshold
AC125 Threshold -> VIH(ac) = VREF(dc) + 125mV, VIL(ac) = VREF(dc) - 125mV
CK, CK# Differential Slew Rate
DDR3
CMD/ADD
Slew Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
” tIS
79
1.4V/ns
” tIH
66
” tIS
87
1.2V/ns
” tIH
74
” tIS
95
” tIH
84
1.0V/ns
2
” tIS
63
” tIH
50
” tIS
63
” tIH
50
” tIS
63
” tIH
50
” tIS
71
” tIH
58
” tIS
103
” tIH
100
1.5
42
34
42
34
42
34
50
42
58
50
66
58
74
68
82
84
1
0
0
0
0
0
0
8
8
16
16
24
24
32
34
40
50
0.9
4
-4
4
-4
4
-4
12
4
20
12
28
20
36
30
44
46
0.8
6
-10
6
-10
6
-10
14
-2
22
6
30
14
38
24
46
40
0.7
11
-16
11
-16
11
-16
19
-8
27
0
35
8
43
18
51
34
0.6
16
-26
16
-26
16
-26
24
-18
32
-10
40
-2
48
8
56
24
0.5
15
-40
15
-40
15
-40
23
-32
31
-24
39
-16
47
-6
55
10
0.4
13
-60
13
-60
13
-60
21
-52
29
-44
37
-36
45
-26
53
-10
9.5.9 Required minimum time tVAC above VIH(ac) {below VIL(ac)} for valid ADD/CMD transition
Slew
Rate
[V/ns]
> 2.0
DDR3
800/1066/1333/1600
175mV
150mV
[ps]
[ps]
75
175
DDR3L
1866/2133
135mV
125mV
[ps]
[ps]
168
173
800/1066/1333/1600
160mV
135mV
[ps]
[ps]
200
213
1866
135mV
[ps]
200
125mV
[ps]
205
205
2
57
170
168
173
200
213
200
1.5
50
167
145
152
173
190
178
184
1
38
130
100
110
120
145
133
143
0.9
34
113
85
96
102
130
118
129
0.8
29
93
66
79
80
111
99
111
89
0.7
22
66
42
56
51
87
75
0.6
Note
30
10
27
13
55
43
59
0.5
Note
Note
Note
Note
Note
10
Note
18
< 0.5
Note
Note
Note
Note
Note
10
Note
18
Note:
The rising input signal shall become equal to or greater than VIH(ac) level; and the falling input signal shall become equal to or less than VIL(ac) level.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
75
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9.5.10 Address / Command Setup, Hold and Derating
9.5.10.1 Nominal slew rate and tVAC for setup time tIS(left) and hold time t IH(right) – ADD/CMD with respect to clock
CK#
CK
CK#
CK
tIS
tIH
tIS
tIH
tIS
VDDQ
Setup slew Rate @ Rising
signal
=
[VIH(ac)min-VREF(dc)]
VIL(dc)MAX
VIL(ac)MAX
VSS
∆TF
VIH(dc)MIN
Nominal
slew rate
/ ΔTR
VREF(dc)
Nominal
slew rate
Hold slew Rate @
Falling signal
=
[VIH(dc)min-VREF(dc)]
/ ΔTF
VIL(dc)MAX
VIL(ac)MAX
/ ΔTR
tVAC
Hold slew Rate @
Rising signal
=
[VREF(dc)-VIL(dc)max]
VREF to DC
region
Nominal
slew rate
Nominal
slew rate
VREF(dc)
tIH
VIH(ac)MIN
Setup slew Rate @
Falling signal
=
[VREF(dc)-VIL(ac)max]
/ ΔTF
VREF to AC region
VIH(dc)MIN
tIS
VDDQ
tVAC
VIH(ac)MIN
tIH
tVAC
VSS
∆TR
∆TF
∆TR
9.5.10.2 Tangent line for setup time tIS(left) and hold time tIH(right) - ADD/CMD with respect to clock
CK#
CK#
CK
tIS
tIS
tIH
tIS
Nominal tVAC
slew rate
VDDQ
VIH(ac)MIN
Setup slew Rate @
Falling signal
= tangent line
[VREF(dc)-VIL(ac)max]
VREF(dc)
tangent
line
tangent
line
Setup slew Rate @
Rising signal
= tangent line
[VIH(ac)min-VREF(dc)]
VIL(dc)MAX
/ ΔTR
VIL(ac)MAX
Nominal
slew rate
VIH(dc)MIN
∆TR
tIH
VREF(dc)
Nominal
slew rate
/ ΔTR
tangent
line
tangent
line
Nominal
slew rate
Hold slew Rate @
Falling signal
= tangent line
[VIH(dc)min-VREF(dc)]
VIL(dc)MAX
tVAC
tIS
Hold slew Rate @
Rising signal
= tangent line
[VREF(dc)-VIL(dc)max]
VIH(ac)MIN
VREF to DC region
/ ΔTF
tIH
VDDQ
VREF to AC region
VIH(dc)MIN
VSS
CK
tIH
VIL(ac)MAX
/ ΔTF
∆TF
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
VSS
∆TR
∆TF
76
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9.6 Data Setup, Hold and Slew Rate Derating
For all input signals the total tDS (setup time) and tDH (hold time) required is calculated by adding the data sheet
tDS(base) and tDH(base) value (see corresponding tables) to the ∆tDS and ∆tDH (see corresponding tables) derating
value respectively. Example: tDS (total setup time) = tDS(base) + ∆tDS.
Setup (tDS) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of VREF(dc) and the
first crossing of V IH(ac) min. Setup (tDS) nominal slew rate for a falling signal is defined as the slew rate between the last
crossing of VREF(dc) and the first crossing of VIL(ac) max. If the actual signal is always earlier than the nominal slew rate
line between shaded ‘VREF(dc) to ac region’, use nominal slew rate for derating value. If the actual signal is later than the
nominal slew rate line anywhere between shaded ‘VREF(dc) to ac region’, the slew rate of a tangent line to the actual
signal from the ac level to VREF(dc) level is used for derating value.
Hold (tDH) nominal slew rate for a rising signal is defined as the slew rate between the last crossing of VIL(dc) max and
the first crossing of VREF(dc) . Hold (tDH) nominal slew rate for a falling signal is defined as the slew rate between the
last crossing of VIH(dc) min and the first crossing of VREF(dc). If the actual signal is always later than the nominal slew
rate line between shaded ‘dc level to VREF(dc) region’, use nominal slew rate for derating value. If the actual signal is
earlier than the nominal slew rate line anywhere between shaded ‘dc to V REF(dc) region’, the slew rate of a tangent line
to the actual signal from the dc level to VREF(dc) level is used for derating value.
For a valid transition the input signal has to remain above/below VIH/IL(ac) for some time tVAC.
Although for slow slew rates the total setup time might be negative (i.e. a valid input signal will not have reached VIH/IL(ac)
at the time of the rising clock transition) a valid input signal is still required to complete the transition and reach VIH/IL(ac) .
For slew rates in between the values listed in the tables, the derating values may obtained by linear interpolation.
These values are typically not subject to production test. They are verified by design and characterization.
9.6.1 Data Setup and Hold Base-Values
Symbol
tDS(base) AC175
tDS(base) AC150
tDS(base) AC135
DDR3
tDS(base) AC135
tDH(base) DC100
tDH(base) DC100
tDS(base) AC160
tDS(base) AC135
DDR3L
tDS(base) AC130
tDH(base) DC90
tDH(base) DC90
Reference
DDR3-800
DDR3-1066
DDR3-1333
DDR3-1600
DDR3-1866
DDR3-2133
Units
75
25
-
-
-
-
ps
125
75
30
10
-
-
ps
165
115
60
40
-
-
ps
-
-
-
-
68
53
ps
150
100
65
45
-
-
ps
-
-
-
-
70
55
ps
90
40
-
-
-
-
ps
140
90
45
25
-
-
ps
-
-
-
-
70
-
ps
160
110
75
55
-
-
ps
-
-
-
-
75
-
ps
VIH/L(ac),
SR= 1V/ns
VIH/L(ac),
SR= 1V/ns
VIH/L(ac),
SR= 1V/ns
VIH/L(ac),
SR= 2V/ns
VIH/L(dc),
SR= 1V/ns
VIH/L(dc),
SR= 2V/ns
VIH/L(ac),
SR= 1V/ns
VIH/L(ac),
SR= 1V/ns
VIH/L(ac),
SR= 2V/ns
VIH/L(dc),
SR= 1V/ns
VIH/L(dc),
SR= 2V/ns
NOTE: (Note: AC/DC referenced for 2V/ns DQ-slew rate and 4V/ns DQS slew rate, or 1V/ns DQ-slew rate and 2V/ns DQS slew rate, as shown.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
77
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9.6.2 Derating values [ps] for DDR3L-800/1066 tDS/tDH - AC/DC based AC160
AC160 Threshold -> VIH(ac) = VREF(dc) + 160mV, VIL(ac) = VREF(dc) - 160mV
DQS, DQS# Differential Slew Rate
DDR3L
DQ Slew
Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
1.4V/ns
1.2V/ns
1.0V/ns
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
2
80
45
80
45
80
45
-
-
-
-
-
-
-
-
-
-
1.5
53
30
53
30
53
30
61
38
-
-
-
-
-
-
-
-
1
0
0
0
0
0
0
8
8
16
16
-
-
-
-
-
-
0.9
-
-
-1
-3
-1
-3
7
5
15
13
23
21
-
-
-
-
0.8
-
-
-
-
-3
-8
5
1
13
9
21
17
29
27
-
-
0.7
-
-
-
-
-
-
3
-5
11
3
19
11
27
21
35
37
0.6
-
-
-
-
-
-
-
-
8
-4
16
4
24
14
32
30
0.5
-
-
-
-
-
-
-
-
-
-
4
-6
12
4
20
20
0.4
-
-
-
-
-
-
-
-
-
-
-
-
-8
-11
0
5
9.6.3 Derating values [ps] for DDR3L-800/1066/1333/1600 tDS/tDH - AC/DC based AC135 Threshold
AC135 Threshold -> VIH(ac) = VREF(dc) + 135mV, VIL(ac) = VREF(dc) - 135mV
DQS, DQS# Differential Slew Rate
DDR3L
DQ Slew
Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
1.4V/ns
1.2V/ns
1.0V/ns
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
2
68
45
68
45
68
45
-
-
-
-
-
-
-
-
-
-
1.5
45
30
45
30
45
30
53
38
-
-
-
-
-
-
-
-
1
0
0
0
0
0
0
8
8
16
16
-
-
-
-
-
-
0.9
-
-
2
-3
2
-3
10
5
18
13
26
21
-
-
-
-
0.8
-
-
-
-
3
-8
11
1
19
9
27
17
35
27
-
-
0.7
-
-
-
-
-
-
14
-5
22
3
30
11
38
21
46
37
0.6
-
-
-
-
-
-
-
-
25
-4
33
4
41
14
49
30
0.5
-
-
-
-
-
-
-
-
-
-
29
-6
37
4
45
20
0.4
-
-
-
-
-
-
-
-
-
-
-
-
30
-11
38
5
9.6.4 Derating values [ps] for DDR3L-1866 tDS/tDH - AC/DC based AC130 Threshold
AC130 Threshold -> VIH(ac) = VREF(dc) + 130mV, VIL(ac) = VREF(dc) - 130mV
DQS, DQS# Differential Slew Rate
DDR3L
4
3.5
3
2.5
2
8.0V/ns
7.0V/ns
6.0V/ns
5.0V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
1.4V/ns
1.2V/ns
ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH
33
23
33
23
33
23
28
19
28
19
28
19
28
19
-
1.0V/ns
ΔtDS
-
ΔtDH
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
22
15
22
15
22
15
22
15
-
-
13
-
9
-
13
0
9
0
13
0
9
0
13
0
9
0
13
0
9
0
0
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-22
-15
-22
-15
-22
-15
-22
-15
-14
-7
-
-
-
-
-
-
-
-
22
-
15
-
-
DQ 1.5
Slew
1
Rate
V/ns 0.9
-
-
-
-
-
-
-
-
-65
-45
-65
-45
-65
-45
-57
-37
-49
-29
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-62
-48
-62
-48
-54
-40
-46
-32
-38
-24
-
-
-
-
0.8
-
-
-
-
-
-
-
-
-
-
-
-
-61
-53
-53
-45
-45
-37
-37
-29
-29
-19
-
-
0.7
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-49
-50
-41
-42
-33
-34
-25
-24
-17
-8
0.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-37
-49
-29
-41
-21
-31
-13
-15
0.5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-31
-51
-23
-41
-15
-25
0.4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-28
-56
-20
-40
Integrated Silicon Solution, Inc. – www.issi.com –
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5/7/2015
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IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9.6.5 Derating values [ps] for DDR3-800/1066 tDS/tDH - AC/DC based AC175 Threshold
AC175 Threshold -> VIH(ac) = VREF(dc) + 175mV, VIL(ac) = VREF(dc) - 175mV
DQS, DQS# Differential Slew Rate
DDR3
DQ Slew
Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
1.4V/ns
1.2V/ns
1.0V/ns
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
2
88
50
88
50
88
50
-
-
-
-
-
-
-
-
-
-
1.5
59
34
59
34
59
34
67
42
-
-
-
-
-
-
-
-
1
0
0
0
0
0
0
8
8
16
16
-
-
-
-
-
-
0.9
-
-
-2
-4
-2
-4
6
4
14
12
22
20
-
-
-
-
0.8
-
-
-
-
-6
-10
2
-2
10
6
18
14
26
24
-
-
0.7
-
-
-
-
-
-
-3
-8
5
0
13
8
21
18
29
34
0.6
-
-
-
-
-
-
-
-
-1
-10
7
-2
15
8
23
24
0.5
-
-
-
-
-
-
-
-
-
-
-11
-16
-2
-6
5
10
0.4
-
-
-
-
-
-
-
-
-
-
-
-
-30
-26
-22
-10
9.6.6 Derating values [ps] for DDR3-800/1066/1333/1600 tDS/tDH - AC/DC based AC150 Threshold
AC150 Threshold -> VIH(ac) = VREF(dc) + 150mV, VIL(ac) = VREF(dc) - 150mV
DQS, DQS# Differential Slew Rate
DDR3
DQ Slew
Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
1.4V/ns
1.2V/ns
1.0V/ns
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
2
75
50
75
50
75
50
-
-
-
-
-
-
-
-
-
-
1.5
50
34
50
34
50
34
58
42
-
-
-
-
-
-
-
-
1
0
0
0
0
0
0
8
8
16
16
-
-
-
-
-
-
0.9
-
-
0
-4
0
-4
8
4
16
12
24
20
-
-
-
-
0.8
-
-
-
-
0
-10
8
-2
16
6
24
14
32
24
-
-
0.7
-
-
-
-
-
-
8
-8
16
0
24
8
32
18
40
34
0.6
-
-
-
-
-
-
-
-
15
-10
23
-2
31
8
39
24
0.5
-
-
-
-
-
-
-
-
-
-
14
-16
22
-6
30
10
0.4
-
-
-
-
-
-
-
-
-
-
-
-
7
-26
15
-10
9.6.7 Derating values [ps] for DDR3-1866/2133 tDS/tDH - AC/DC based AC135 Threshold
AC135 Threshold -> VIH(ac) = VREF(dc) + 135mV, VIL(ac) = VREF(dc) - 135mV
DC100 Threshold -> VIH(dc) = VREF(dc) + 100mV, VIL(dc) = VREF(dc) - 100mV
DQS, DQS# Differential Slew Rate
DDR3
8.0V/ns
4
3.5
6.0V/ns
5.0V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
1.4V/ns
1.2V/ns
1.0V/ns
29
21
29
21
29
21
29
21
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
23
17
23
17
23
17
23
17
-
14
-
10
-
14
0
10
0
14
0
10
0
14
0
10
0
14
0
10
0
-
-
-
-
-
-
-
-
-
-
-
-
-
0
0
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-23
-17
-23
-17
-23
-17
-23
-17
-15
-9
-
-
-
-
-
-
-
-
1
-
-
-
-
-
-
-
-
-68
-50
-68
-50
-68
-50
-60
-42
-52
-34
-
-
-
-
-
-
0.9
-
-
-
-
-
-
-
-
-
-
-66
-54
-66
-54
-58
-46
-50
-38
-42
-30
-
-
-
-
0.8
-
-
-
-
-
-
-
-
-
-
-
-
-64
-60
-56
-52
-48
-44
-40
-36
-32
-26
-
-
0.7
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-53
-59
-45
-51
-37
-43
-29
-33
-21
-17
0.6
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-43
-61
-35
-53
-27
-43
-19
-27
0.5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-39
-66
-31
-56
-23
-40
0.4
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-36
-76
-30
-60
3
23
-
17
-
-
1.5
2.5
2
DQ
Slew
Rate
V/ns
7.0V/ns
ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH ΔtDS ΔtDH
34
25
34
25
34
25
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
79
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9.6.8 Derating values [ps] for DDR3-800/1066/1333/1600 tDS/tDH - AC/DC based AC135 Threshold
AC135 Threshold -> VIH(ac) = VREF(dc) + 135mV, VIL(ac) = VREF(dc) - 135mV
DC100 Threshold -> VIH(dc) = VREF(dc) + 100mV, VIL(dc) = VREF(dc) - 100mV
DQS, DQS# Differential Slew Rate
DDR3
DQ Slew
Rate
V/ns
4.0V/ns
3.0V/ns
2.0V/ns
1.8V/ns
1.6V/ns
1.4V/ns
1.2V/ns
1.0V/ns
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
” tDS
” tDH
2
68
50
68
50
68
50
-
-
-
-
-
-
-
-
-
-
1.5
45
34
45
34
45
34
53
42
-
-
-
-
-
-
-
-
1
0
0
0
0
0
0
8
8
16
16
-
-
-
-
-
-
0.9
-
-
2
-4
2
-4
10
4
18
12
26
20
-
-
-
-
0.8
-
-
-
-
3
-10
11
-2
19
6
27
14
35
24
-
-
0.7
-
-
-
-
-
-
14
-8
22
0
30
8
38
18
46
34
0.6
-
-
-
-
-
-
-
-
25
-10
33
-2
41
8
49
24
0.5
-
-
-
-
-
-
-
-
-
-
29
-16
37
-6
45
10
0.4
-
-
-
-
-
-
-
-
-
-
-
-
30
-26
38
-10
9.6.9 Required minimum time tVAC [ps] above VIH(ac) {below VIL(ac)} for valid DQ transition
Slew
Rate
[V/ns]
DDR3
800/1066
800/1066/1333/1600
AC175
AC150
DDR3L
800/1066/1333/1600
1866
2133
AC135
800/1066
800/1066/1333/1600
1866
AC160
AC135
AC130
> 2.0
75
105
113
93
73
165
113
95
2
57
105
113
93
73
165
113
95
1.5
50
80
90
70
50
138
90
73
30
1
38
30
45
25
5
85
45
0.9
34
13
30
Note
Note
67
30
16
0.8
29
Note
11
Note
Note
45
11
Note
0.7
Note
Note
Note
-
-
16
Note
-
0.6
Note
Note
Note
-
-
Note
Note
-
0.5
Note
Note
Note
-
2
Note
Note
-
< 0.5
Note
Note
Note
Note
Note
Note:
The rising input signal shall become equal to or greater than VIH(ac) level; and the falling input signal shall become equal to or less than VIL(ac) level
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
80
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
9.6.10 Data Setup, Hold and Slew Rate Derating
9.6.10.1 Nominal slew rate and tVAC for setup time tDS(left) and hold time t DH(right)
DQS
- DQ with respect to strobe
DQS
VDDQ
tDS
tDH
tDS
VDDQ
tDH
tDS
tDH
tDS
tDH
tVAC
VIH(ac)MIN
Nominal
slew rate
Nominal
slew rate
Setup slew Rate @ Rising
signal
=
[VIH(ac)min-VREF(dc)]
VIL(dc)MAX
VIL(ac)MAX
/ ΔTR
VIH(dc)MIN
/ ΔTR
Nominal
slew rate
Nominal
slew rate
VREF(dc)
Hold slew Rate @
Falling signal
=
[VIH(dc)min-VREF(dc)]
VIL(dc)MAX
VIL(ac)MAX
VREF to DC region
/ ΔTF
VREF(dc)
Hold slew Rate @
Rising signal
=
[VREF(dc)-VIL(dc)max]
VIH(ac)MIN
VREF to AC region
VIH(dc)MIN
Setup slew Rate @
Falling signal
=
[VREF(dc)-VIL(ac)max]
/ ΔTF
tVAC
tVAC
VSS
∆TF
∆TF
∆TR
VSS
∆TR
9.6.10.2 Tangent line for setup time tDS(left) and hold time tDH(right) - DQ with respect to strobe
DQS#
DQS#
DQS
DQS
tDS
VDDQ
tDS
tDH
Nominal
slew rate
tDH
tDS
VDDQ
tDH
tDH
tVAC
VIH(ac)MIN
Nominal
slew rate
VIH(ac)MIN
tangent
line
/ ΔTF
VREF(dc)
tangent
line
VIL(dc)MAX
Setup slew Rate @
Rising signal
= tangent line
[VIH(ac)min-VREF(dc)]
/ ΔTR
VIL(ac)MAX
Nominal
slew rate
VSS
tVAC
∆TR
VIH(dc)MIN
VREF(dc)
VREF to DC region
Setup slew Rate @
Falling signal
= tangent line
[VREF(dc)-VIL(ac)max]
VREF to AC region
VIH(dc)MIN
tDS
Hold slew Rate @
Rising signal
= tangent line
[VREF(dc)-VIL(dc)max]
/ ΔTR
tangent
line
VIL(dc)MAX
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
Nominal
slew rate
Hold slew Rate @
Falling signal
= tangent line
[VIH(dc)min-VREF(dc)]
VIL(ac)MAX
/ ΔTF
VSS
∆TF
tangent
line
∆TR
∆TF
81
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
ORDERING INFORMATION, 64MX16, 1.5V (DDR3)
64Mx16 - Commercial Range: (0°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1333MT/s
8-8-8
IS43TR16640A -15GBL
96-ball FBGA, Lead-free
1600MT/s
1866MT/s
10-10-10
13-13-13
IS43TR16640A -125JBL
IS43TR16640A-107MBL
96-ball FBGA, Lead-free
96-ball FBGA, Lead-free
64Mx16 - Industrial Range: (–40°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1333MT/s
1600MT/s
8-8-8
10-10-10
IS43TR16640A -15GBLI
IS43TR16640A -125JBLI
96-ball FBGA, Lead-free
96-ball FBGA, Lead-free
1866MT/s
13-13-13
IS43TR16640A-107MBLI
96-ball FBGA, Lead-free
64Mx16 – Automotive, A1 Range: (–40°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1066MT/s
1333MT/s
7-7-7
8-8-8
IS46TR16640A -187FBLA1
IS46TR16640A -15GBLA1
96-ball FBGA, Lead-free
96-ball FBGA, Lead-free
1333MT/s
1600MT/s
9-9-9
10-10-10
IS46TR16640A -15HBLA1
IS46TR16640A -125JBLA1
96-ball FBGA, Lead-free
96-ball FBGA, Lead-free
64Mx16 – Automotive, A2 Range: (–40°C ≤ TC ≤ 105°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1066MT/s
1333MT/s
7-7-7
8-8-8
IS46TR16640A -187FBLA2
IS46TR16640A -15GBLA2
96-ball FBGA, Lead-free
96-ball FBGA, Lead-free
1333MT/s
1600MT/s
9-9-9
10-10-10
IS46TR16640A -15HBLA2
IS46TR16640A -125JBLA2
96-ball FBGA, Lead-free
96-ball FBGA, Lead-free
Note: Contact ISSI for availability of options.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
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IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
ORDERING INFORMATION, 128MX8, 1.5V (DDR3)
128Mx8 - Commercial Range: (0°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1333MT/s
8-8-8
IS43TR81280A -15GBL
78-ball FBGA,Lead-free
1600MT/s
10-10-10
IS43TR81280A -125JBL
78-ball FBGA,Lead-free
128Mx8 - Industrial Range: (–40°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1333MT/s
8-8-8
IS43TR81280A -15GBLI
78-ball FBGA,Lead-free
1600MT/s
10-10-10
IS43TR81280A -125JBLI
78-ball FBGA,Lead-free
128Mx8 – Automotive, A1 Range: (–40°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1333MT/s
8-8-8
IS46TR81280A -15GBLA1
78-ball FBGA,Lead-free
1600MT/s
10-10-10
IS46TR81280A -125JBLA1
78-ball FBGA,Lead-free
128Mx8 – Automotive, A2 Range: (–40°C ≤ TC ≤ 105°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1333MT/s
8-8-8
IS46TR81280A -15GBLA2
78-ball FBGA,Lead-free
Note: Contact ISSI for availability of options.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
83
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
ORDERING INFORMATION, 64MX16, 1.35V (DDR3L)
64Mx16 - Commercial Range: (0°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1600MT/s
10-10-10
IS43TR16640AL -125JBL
96-ball FBGA,Lead-free
64Mx16 - Industrial Range: (–40°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1600MT/s
10-10-10
IS43TR16640AL -125JBLI
96-ball FBGA,Lead-free
64Mx16 – Automotive, A1 Range: (–40°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1600MT/s
10-10-10
IS46TR16640AL -125JBLA1
96-ball FBGA,Lead-free
64Mx16 – Automotive, A2 Range: (–40°C ≤ TC ≤ 105°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1600MT/s
10-10-10
IS46TR16640AL -125JBLA2
96-ball FBGA,Lead-free
Note: Contact ISSI for availability of options.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
84
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
ORDERING INFORMATION, 128MX8, 1.35V (DDR3L)
128Mx8 - Commercial Range: (0°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1600MT/s
10-10-10
IS43TR81280AL -125JBL
78-ball FBGA,Lead-free
128Mx8 - Industrial Range: (–40°C ≤ TC ≤ 95°C)
Data Rate
CL-tRCD-tRP
Order Part No.
Package
1600MT/s
10-10-10
IS43TR81280AL -125JBLI
78-ball FBGA,Lead-free
Note: Contact ISSI for availability of options.
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
85
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
86
IS43/46TR16640A, IS43/46TR16640AL
IS43/46TR81280A, IS43/46TR81280AL
Integrated Silicon Solution, Inc. – www.issi.com –
Rev. H
5/7/2015
87