IDT IDT74SSTUAE32866ABFG 25-bit configurable registered buffer for ddr2 Datasheet

DATASHEET
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
Description
outputs will remain low, thus ensuring no glitches on the
output.
This 25-bit 1:1 or 14-bit 1:2 configurable registered buffer is
designed for 1.425V to 1.575V VDD operation.
The device monitors both DCS and CSR inputs and will
gate the Qn outputs from changing states when both DCS
and CSR inputs are high. If either DCS and CSR input is
low, the Qn outputs will function normally. The RESET input
has priority over the DCS and CSR control and will force the
outputs low. If the DCS-control functionality is not desired,
then the CSR input can be hardwired to ground, in which
case, the setup-time requirement for DCS would be the
same as for the other D data inputs. Package options
include 96-ball LFBGA (MO-205CC).
The control inputs are LVCMOS. All outputs are 1.5-V
CMOS drivers that have been optimized to drive the DDR-II
DIMM load. IDT74SSTUAE32866A operates from a
differential clock (CLK and CLK). Data are registered at the
crossing of CLK going high, and CLK going low.
The C0 input controls the pinout configuration of the 1:2
pinout from A configuration (when low) to B configuration
(when high). The C1 input controls the pinout configuration
from 25-bit 1:1 (when low) to 14-bit 1:2 (when high).
Features
A - Pair Configuration (C01 = 0, C11 = 1 and C02 = 0,
C12 = 1)
• Supports 1.5V VDD operation for DDR2 DIMMs
• 25-bit 1:1 or 14-bit 1:2 registered buffer with parity check
Parity that arrives one cycle after the data input to which it
applies is checked on the PAR_IN of the first register. The
second register produces to PPO and QERR signals. The
QERR of the first register is left floating. The valid error
information is latched on the QERR output of the second
register. If an error occurs QERR is latched low for two
cycles or until RESET is low.
•
•
•
functionality
Supports LVCMOS switching levels on C0, C1, and
RESET inputs
Low voltage operation: VDD = 1.425V to 1.575V
Available in 96-ball LFBGA package
B - Single Configuration (C0 = 0, C1 = 0)
The device supports low-power standby operation. When
the RESET input (RESET) is low, the differential input
receivers are disabled, and undriven (floating) data, clock
and reference voltage (VREF) inputs are allowed. In
addition, when RESET is low all registers are reset, and all
outputs are forced low. The LVCMOS RESET and Cn inputs
must always be held at a valid logic high or low level. To
ensure defined outputs from the register before a stable
clock has been supplied, RESET must be held in the low
state during power up.
Applications
• DDR2 Memory Modules running at 1.5V VDD
• Provides complete DDR DIMM solution with
•
ICS98UAE877A
Ideal for DDR2 667
In the DDR-II RDIMM application, RESET is specified to be
completely asynchronous with respect to CLK and CLK.
Therefore, no timing relationship can be guaranteed
between the two. When entering reset, the register will be
cleared and the outputs will be driven low quickly, relative to
the time to disable the differential input receivers. However,
when coming out of reset, the register will become active
quickly, relative to the time to enable the differential input
receivers. As long as the data inputs are low, and the clock
is stable during the time from the low-to-high transition of
RESET until the input receivers are fully enabled, the
design of the IDT74SSTUAE32866A must ensure that the
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
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Functional Block Diagram for 1:1 Mode (Positive Logic)
RESET
CLK
CLK
VREF
DCKE
D
C1
QCKEA
C1
QOTDA
C1
QCSA
R
DODT
D
R
DCS
1D
R
CSR
D1
O
1
Q1A
1D
C1
R
Q1B
(1)
TO 21 OTHER CHANNELS
NOTE:
1. Disabled in 1:1 configuration.
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Functional Block Diagram for 1:2 Mode (Positive Logic)
RESET
CLK
CLK
VREF
DCKE
QCKEA
1D
C1
R
DODT
QCKEB
(1)
QODTA
1D
C1
R
DCS
QODTB
(1)
QCSA
1D
C1
R
QCSB
(1)
CSR
D1
0
1
1D
Q1A
C1
R
Q1B
(1)
TO 10 OTHER CHANNELS (D2-D6, D8-D10, D12-D13)
NOTE:
1. Disabled in 1:1 configuration.
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Pin Configurations
14 BIT 1:2 REGISTERS
1
2
3
4
A
DCKE
PPO
VREF
VDD
B
D2
NC
GND
GND
5
6
1
2
3
4
5
6
VREF
VDD
Q1A
Q1B
GND
GND
Q2A
Q2B
A
D1
PPO
Q2A
Q2B
B
D2
NC
Q3A
Q3B
C
D3
NC
VDD
VDD
Q3A
Q3B
D
D4
QERR
GND
GND
Q4A
Q4B
Q5B
E
D5
NC
VDD
VDD
Q5A
Q5B
Q6B
F
D6
NC
GND
GND
Q6A
Q6B
VDD
VDD
QCKEA QCKEB
C
D3
NC
VDD
VDD
D
DODT
QERR
GND
GND
E
D5
NC
VDD
VDD
Q5A
F
D6
NC
GND
GND
Q6A
QODTA QODTB
G PAR_IN RESET
VDD
VDD
C1
C0
C1
C0
H
CLK
DCS
GND
GND
QCSA
QCSB
H
CLK
DCS
GND
GND
QCSA
QCSB
J
CLK
CSR
VDD
VDD
ZOH
ZOL
J
CLK
CSR
VDD
VDD
ZOH
ZOL
GND
Q8A
Q8B
K
D8
NC
GND
GND
Q8A
Q8B
VDD
Q9A
Q9B
L
D9
NC
VDD
VDD
Q9A
Q9B
D10
NC
GND
GND
Q10A
Q10B
G PAR_IN RESET
K
D8
NC
GND
L
D9
NC
VDD
M
D10
NC
GND
GND
Q10A
Q10B
M
N
D11
NC
VDD
VDD
Q11A
Q11B
N
DODT
NC
VDD
VDD
D12
NC
GND
GND
P
D12
NC
GND
GND
Q12A
Q12B
P
R
D13
NC
VDD
VDD
Q13A
Q13B
R
D13
NC
VDD
VDD
Q14B
T
DCKE
NC
VREF
VDD
T
D14
NC
VREF
VDD
Q14A
QODTA QODTB
Q12A
Q12B
Q13A
Q13B
QCKEA QCKEB
REGISTER B (C0 = 1, C1 = 1)
REGISTER A (C0 = 0, C1 = 1)
25 BIT 1:1 REGISTER
2
3
4
5
6
A
DCKE
1
PPO
VREF
VDD
QCKE
NC
B
D2
D15
GND
GND
Q2
Q15
C
D3
D16
VDD
VDD
Q3
Q16
D
DODT
QERR
GND
GND
QODT
NC
E
D5
D17
VDD
VDD
Q5
Q17
F
D6
D18
GND
GND
Q6
Q18
G PAR_IN RESET
VDD
VDD
C1
C0
H
CLK
DCS
GND
GND
QCS
NC
J
CLK
CSR
VDD
VDD
ZOH
ZOL
K
D8
D19
GND
GND
Q8
Q19
L
D9
D20
VDD
VDD
Q9
Q20
M
D10
D21
GND
GND
Q10
Q21
N
D11
D22
VDD
VDD
Q11
Q22
P
D12
D23
GND
GND
Q12
Q23
R
D13
D24
VDD
VDD
Q13
Q24
T
D14
D25
VREF
VDD
Q14
Q25
C0 = 0, C1 = 0
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96 Ball LFBGA Package Attributes
6
5
4
3
2
1
A
Top
Marking
B
C
D
E
F
G
H
J
K
L
M
L
M
N
P
R
T
TOP VIEW
A
B
C
D
E
F
G
H
J
K
N
P
R
T
1
2
3
4
5
6
BOTTOM VIEW
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
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SIDE VIEW
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Function Table
Inputs1
Outputs
RESET
DCS
CSR
CLK
CLK
Dn, DODT,
DCKE
Qn
QCS
QODT,
QCKE
H
L
L
↑
↓
L
L
L
L
H
L
L
↑
↓
H
H
L
H
H
L
L
L or H
L or H
X
Q 02
Q02
Q02
H
L
H
↑
↓
L
L
L
L
H
L
H
↑
↓
H
H
H
L
H
L or H
L or H
X
Q0
H
H
L
↑
↓
L
L
H
H
L
↑
↓
H
H
L
2
Q0
H
Q0
H
L
L or H
L or H
X
Q0
H
H
H
↑
↓
L
Q 02
H
H
H
H
↑
↓
H
Q 02
H
X
Q0
2
X or Floating
L
H
L
X or
Floating
1
2
H
L or H
L or H
X or
X or
X or
Floating Floating Floating
Q0
L
Q02
L
H
2
H
H
H
2
H
2
Q02
L
H
2
Q02
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
↑ = LOW to HIGH
↓ = HIGH to LOW
Output level before the indicated steady-state conditions were established.
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Parity and Standby Function Table
Inputs1
Outputs
RESET
DCS
CSR
CLK
CLK
Σ of Inputs = H
(D1 - D25)
PAR_IN2
H
L
X
↑
↓
Even
L
L
H
H
L
X
↑
↓
Odd
L
H
L
H
L
X
↑
↓
Even
H
H
L
H
L
X
↑
↓
Odd
H
L
H
H
X
L
↑
↓
Even
L
L
H
H
X
L
↑
↓
Odd
L
H
L
H
X
L
↑
↓
Even
H
H
L
H
X
L
↑
↓
Odd
H
L
H
H
H
H
↑
↓
X
X
PPO0
QERR0
H
X
X
L or H
L or H
X
X
PPO0
QERR0
L
X or
Floating
X or
Floating
X or
Floating
X or
Floating
X or Floating
X or Floating
L
H
PPO
QERR3
1
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
↑ = LOW to HIGH
↓ = HIGH to LOW
Data Inputs = D2, D3, D5, D6, D8 - D25 when C0 = 0 and C1 = 0.
Data Inputs = D2, D3, D5, D6, D8 - D14 when C0 = 0 and C1 = 1.
Data Inputs = D1 - D6, D8 - D10, D12, D13 when C0 = 1 and C1 = 1.
2 PAR_IN arrives one clock cycle after the data to which it applies when C0 = 0, and two clock cycles when
C0 = 1.
3 This transition assumes QERR is HIGH at the crossing of CLK going HIGH and CLK going LOW. If
QERR is LOW, it stays latched LOW for two clock cycles or until RESET is driven LOW.
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Logic Diagram (1:1)
G2
RESET
CLK
CLK
D2 - D3,
D5 - D6,
D8 - D25
VREF
H1
J1
LPS0
(Internal Node)
22
CE
CE
D
A3, T3
22
Q
CLK
D2 - D3,
D5 - D6,
D8 - D25
Q2 - Q3,
Q5 - Q6,
Q8 - Q25
22
R
22
D2 - D3,
D5 - D6,
D8 - D25
Parity
Check
C1
G5
1
0
Q
D
R
R
C0
Q
D
CLK
CLK
PAR_IN
Q
D
1
A2
PPO
0
CLK
R
CE
G1
D2
QERR
G6
CLK
2-Bit
Counter
LPS1
(Internal Node)
R
0
D
Q
1
CLK
R
Parity Logic Diagram for 1:1 Register Configuration (Positive Logic); C0 = 0, C1 = 0
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Logic Diagram (1:2)
G2
RESET
CLK
CLK
D2 - D3,
D5 - D6,
D8 - D14
VREF
H1
J1
LPS0
(Internal Node)
11
CE
CE
D
A3, T3
11
Q
CLK
D2 - D3,
D5 - D6,
D8 - D14
Q2A - Q3A,
Q5A - Q6A,
Q8A - Q14A
11
11
Q2B - Q3B,
Q5B - Q6B,
Q8B - Q14B
R
11
D2 - D3,
D5 - D6,
D8 - D14
Parity
Check
C1
G5
1
0
Q
D
D
1
R
R
C0
Q
D
CLK
CLK
PAR_IN
Q
A2
PPO
0
CLK
R
CE
G1
D2
QERR
G6
CLK
2-Bit
Counter
LPS1
(Internal Node)
R
0
D
Q
1
CLK
R
Parity Logic Diagram for 1:2 Register - A Configuration (Positive Logic);
C0 = 0, C1 = 1
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Logic Diagram (1:2)
G2
RESET
CLK
CLK
H1
J1
D1 - D6,
D8 - D13
VREF
LPS0
(Internal Node)
11
D1 - D6,
D8 - D13
CE
CE
D
A3, T3
Q
CLK
11
Q1A - Q6A,
Q8A - Q13A
11
Q1B - Q6B,
Q8B - Q13B
11
R
11
D1 - D6,
D8 - D13
Parity
Check
C1
G5
1
0
Q
D
1
R
R
C0
Q
D
CLK
CLK
PAR_IN
Q
D
A2
PPO
0
CLK
R
CE
G1
D2
QERR
G6
CLK
2-Bit
Counter
LPS1
(Internal Node)
R
0
D
Q
1
CLK
R
Parity Logic Diagram for 1:2 Register - B Configuration (Positive Logic);
C0 = 1, C1 = 1
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Absolute Maximum Ratings
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.
Item
Rating
Supply Voltage, VDD
-0.5V to 2.5V
1
-0.5V to 2.5V
VO1,2
-0.5V to VDD + 0.5V
Input Voltage Range, VI
Output Voltage Range,
Input Clamp Current, IIK
±50mA
Output Clamp Current, IOK
±50mA
Continuous Output Clamp Current, IO
±50mA
Continuous Current through each VDD or GND
±100mA
Package Thermal Impedance (θja)3
0m/s Airflow
70.9°C/W
1m/s Airflow
65°C/W
Storage Temperature
-65 to +150°C
1 The input and output negative voltage ratings may be exceeded if the ratings of the I/P and
O/P clamp current are observed.
2 This current will flow only when the output is in the high state level VO > VDDQ.
3 The package thermal impedance is calculated in accordance with JESD 51.
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Terminal Functions
Terminal Name
Electrical
Characteristics
GND
Ground Input
Ground
VDD
1.5V nominal
Power Supply Voltage
VREF
0.75V nominal
Input Reference Clock
ZOH
Input
Reserved for future use
ZOL
Input
Reserved for future use
CLK
Differential Input
Positive Master Clock Input
CLK
Differential Input
Negative Master Clock Input
C0, C1
LVCMOS Input
Configuration Control Inputs
RESET
LVCMOS Input
Asynchronous Reset Input. Resets registers and disables VREF
data and clock differential-input receivers.
CSR, DCS
1.5V Input
Chip Select Inputs. Disables outputs D1 - D24 output switching
when both inputs are HIGH.
D1 - D25
1.5V Input
Data Input. Clocked in on the crossing of the rising edge of CLK
and the falling edge of CLK.
DODT
1.5V Input
The outputs of this register bit will not be suspended by the DCS
and CSR controls
DCKE
1.5V Input
The outputs of this register bit will not be suspended by the DCS
and CSR controls
Q1 - Q25
1.5V CMOS
Data Outputs that are suspended by the DCS and CSR controls
QCS
1.5V CMOS
Data Output that will not be suspended by the DCS and CSR
controls
QODT
1.5V CMOS
Data Output that will not be suspended by the DCS and CSR
controls
QCKE
1.5V CMOS
Data Output that will not be suspended by the DCS and CSR
controls
PPO
1.5V CMOS
Partial Parity Output. Indicates off parity of D1 - D25
PAR_IN
1.5V Input
QERR
Open Drain Output
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
Description
Parity Input arrives one cycle after corresponding data input
Output Error bit, generated one cycle after the corresponding data
output
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Operating Characteristics
The RESET and Cn inputs of the device must be held at valid levels (not floating) to ensure proper device operation.
The differential inputs must not be floating unless RESET is LOW.
Parameter
Min.
Typ.
Max.
Units
VDDQ
I/O Supply Voltage
1.425
1.5
1.575
V
VREF
Reference Voltage
0.49 * VDD
0.5 * VDD
0.51 * VDD
V
VTT
Termination Voltage
VREF - 0.04
VREF
VREF + 0.04
V
VDD
V
Symbol
VI
Input Voltage
VIH
AC High-Level Input Voltage
0
VIL
Data, CSR,
AC Low-Level Input Voltage
and
PAR_IN
DC High-Level Input Voltage
inputs
DC Low-Level Input Voltage
VIH
High-Level Input Voltage
VIL
Low-Level Input Voltage
VIL
VIH
VIX(AC)
RESET,
C0, C1
VREF + 175
VREF - 175
VREF + 100
VREF - 100
0.65 * VDDQ
0.35 * VDDQ
Differential Input Crosspoint
Voltage Range
CLK, CLK
0.5 * VDD 175
VID
Differential Input Voltage
CLK, CLK
350
IOH
High-Level Output Current
-6
IOL
Low-Level Output Current
6
IERROL
TA
QERR LOW Level Output Current
25
Operating Free-Air Temperature
0
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
13
mV
0.5 * VDD
0.5 * VDD +
175
V
MV
mV
mA
mA
+70
IDT74SSTUAE32866A
°C
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25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
DC Electrical Characteristics Over Operating Range
Following Conditions Apply Unless Otherwise Specified:
Operating Condition: TA = 0°C to +70°C, VDD = 1.425V to 1.575V.
Symbol Parameter
VIK
Test Conditions
Min.
Typ.
II = -18mA
Max.
Units
-1.2
V
Output HIGH Voltage
IOH = -6mA
VOL
Output LOW Voltage
IOL = 6mA
0.4
V
VERROL
QERR Output LOW
Voltage
IERROL = 25mA, VDD = 1.425V
0.4
V
All Inputs
VI = VDD or GND; VDD = 1.575V
+5
μA
Static Standby
IO = 0, VDD = 1.575V, RESET = GND
100
μA
IO = 0, VDD = 1.575V, RESET = VDD, VI =
VIH(AC) or VIL(AC), CLK = CLK = VIH(AC)
or VIL(AC)
20
VOH
IIL
IDD
Static Operating
V
-5
mA
IO = 0, VDD = 1.575V, RESET = VDD, VI =
VIH(AC) or VIL(AC), CLK = VIH(AC), CLK =
VIL(AC)
80
Dynamic Operating
(clock only)
IO = 0, VDD = 1.5V, RESET = VDD, VI =
VIH(AC) or VIL(AC), CLK and CLK
switching 50% duty cycle
170
Dynamic Operating
(per each data input)
IO = 0, VDD = 1.5V, RESET =
VDD, VI = VIH(AC) or VIL(AC),
CLK and CLK switching 50%
duty cycle. One data input
switching at half clock frequency,
50% duty cycle.
Data Inputs
VI = VREF ± 0.175
2
3
CLK and CLK
VICR = 0.75V, VIPP = 360mV
2
3
RESET
VI = VDD or GND
IDDD
CIN
VDD 0.4
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
1:1
mode
μA/Clock
MHz
50
1:2
mode
μA/Clock
MHz/
Data
Input
90
pF
5
14
IDT74SSTUAE32866A
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25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Timing Requirements Over Recommended Operating Free-Air Temperature
Range
VDD = 1.5V ± 0.075V
Symbol
fCLOCK
tW
Min.
Parameter
Clock Frequency
Pulse Duration, CLK, CLK HIGH or LOW
tACT
1
tINACT2
tSU
Units
410
MHz
1
ns
Differential Inputs Active Time
10
ns
Differential Inputs Inactive Time
15
ns
Setup
Time
Hold
Time
tH
Max.
DCS before CLK↑, CLK↓, CSR HIGH; CSR
before CLK↑, CLK↓, DCS HIGH
0.7
DCS before CLK↑, CLK↓, CSR LOW
0.5
DODT, DOCKE, and data before CLK↑, CLK↓
0.5
PAR_IN before CLK↑, CLK↓
0.5
DCS, DODT, DCKE, and data after CLK↑, CLK↓
0.5
PAR_IN after CLK↑, CLK↓
0.5
ns
ns
1 VREF must be held at a valid input voltage level and data inputs must be held at valid logic levels for a
minimum time of tACT(max) after RESET is taken HIGH.
2 VREF, data, and clock inputs must be held at a valid input voltage levels (not floating) for a minimum
time of tINACT(max) after RESET is taken LOW.
Switching Characteristics Over Recommended Free Air Operating Range
(unless otherwise noted)
VDD = 1.5V ± 0.075V
Symbol
fMAX
tPDM
1
tPDQ2
tPDMSS
1
Parameter
Min.
Max Input Clock Frequency
410
Propagation Delay, single bit switching, CLK↑ / CLK↓ to Qn
1.1
1.9
ns
Propagation Delay, single-bit switching, CLK↑ / CLK↓ to Qn
0.4
0.8
ns
2
ns
Propagation Delay, simultaneous switching, CLK↑ / CLK↓ to Qn
Max.
Units
MHz
tPD
Propagation Delay, CLK and CLK to PPO
0.5
1.7
ns
tLH
LOW to HIGH Propagation Delay, CLK↑ / CLK↓ to QERR
1.2
3
ns
tHL
HIGH to LOW Propagation Delay, CLK↑ / CLK↓ to QERR
1
2.4
ns
tPHL
HIGH to LOW Propagation Delay, RESET↓ to PPO to Qn↓
3
ns
tPLH
LOW to HIGH Propagation Delay, RESET↓ to QERR↑
3.3
ns
1
2
Design target as per JEDEC specifications.
Production Test. (See Production Test Circuit in TEST CIRCUIT AND WAVEFORM section.)
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
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IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Output Buffer Characteristics
Output edge rates over recommended operating free-air temperature range
VDD = 1.5V ± 0.075V
Parameter
dV/dt_r
dV/dt_f
dV/dt_Δ
1
1
Min.
Max.
Units
1
4
V/ns
1
4
V/ns
1
V/ns
Difference between dV/dt_r (rising edge rate) and dV/dt_f (falling edge rate).
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
16
IDT74SSTUAE32866A
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IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
RESET
DCS
CSR
n
n +1
n+2
n+3
n+4
CLK
CLK
tACT
tH
tSU
(1)
D1 - D25
tPDM, tPDMSS
CLK to Q
Q1 - Q25
tSU
tH
(1)
PARIN
tPD
CLK to PPO
PPO
tPHL
CLK to QERR
tPHL, tPLH
CLK to QERR
(2)
QERR
Data to QERR Latency
H, L, or X
H or L
Timing Diagram for IDT74SSTUAE32866A Used as a Single Device; C0 = 0, C1 = 0, RESET Switches from L to H
NOTES:
1.After RESET is switched from LOW to HIGH, all data and PAR_IN inputs signals must be set and held low for a minimum time of tACTMAX, to avoid false
error.
2.If the data is clocked in on the n clock pulse, the QERR output signal will be generated on the n+2 clock pulse, and it will be valid on the n+3 clock pulse.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
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IDT74SSTUAE32866A
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IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
Timing Diagram for the First IDT74SSTUAE32866A Used as a Single Device; C0 = 0, C1 = 0, RESET Held HIGH
NOTE:
1.If the data is clocked in on the n clock pulse, the QERR output signal will be generated on the n+2 clock pulse, and it will be valid on the n+3 clock pulse.
If an error occurs and the QERR output is driven low, it stays latched low for a minimum of two clock cycles or until RESET is driven low.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
18
IDT74SSTUAE32866A
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IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
RESET
tINACT
DCS
(1)
(1)
CSR
CLK
CLK
(1)
(1)
(1)
D1 - D25
tRPHL
RESET to Q
Q1 - Q25
(1)
PARIN
tRPHL
RESET to PPO
PPO
QERR
tRPLH
RESET to QERR
H, L, or X
H or L
Timing Diagram for IDT74SSTUAE32866A Used as a Single Device; C0 = 0, C1 = 0, RESET Switches from H to L
NOTE:
1.After RESET is switched from HIGH to LOW, all data and clock inputs signals must be set and held at valid logic levels (not floating) for a minimum time
of tINACTMAX.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
19
IDT74SSTUAE32866A
7120/4
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
RESET
DCS
CSR
n
n +1
n+2
n+3
n+4
CLK
CLK
tACT
tH
tSU
(1)
D1 - D14
tPDM, tPDMSS
CLK to Q
Q1 - Q14
tSU
tH
(1)
PARIN
tPD
CLK to PPO
PPO
tPHL, tPLH
CLK to QERR
tPHL
CLK to QERR
(2)
QERR
(not used)
Data to QERR Latency
H, L, or X
H or L
Timing Diagram for the First IDT74SSTUAE32866A (1:2 Register-A Configuration) Device Used in a Pair; C0 = 0, C1 = 1, RESET
Switches from Lto H
NOTES:
1.After RESET is switched from LOW to HIGH, all data and PAR_IN inputs signals must be set and held low for a minimum time of tACTMAX, to avoid false
error.
2.If the data is clocked in on the n clock pulse, the QERR output signal will be generated on the n+1 clock pulse, and it will be valid on the n+2 clock pulse.
.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
20
IDT74SSTUAE32866A
7120/4
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
Timing Diagram for the First IDT74SSTUAE32866A (1:2 Register-A Configuration) Device Used in a Pair; C0 = 0, C1 = 1, RESET
Held HIGH
NOTE:
1.If the data is clocked in on the n clock pulse, the QERR output signal will be generated on the n+1 clock pulse, and it will be valid on the n+2 clock pulse.
If an error occurs and the QERR output is driven low, it stays latched low for a minimum of two clock cycles or until RESET is driven low.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
21
IDT74SSTUAE32866A
7120/4
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
RESET
tINACT
(1)
DCS
(1)
CSR
CLK
CLK
(1)
(1)
(1)
D1 - D14
tRPHL
RESET to Q
Q1 - Q14
(1)
PARIN
tRPHL
RESET to PPO
PPO
QERR
(not used)
tRPLH
RESET to QERR
H, L, or X
H or L
Timing Diagram for the First IDT74SSTUAE32866A (1:2 Register-A Configuration) Device Used in a Pair; C0 = 1, C1 = 1; RESET
Switches from H to L
NOTE:
1.After RESET is switched from HIGH to LOW, all data and clock inputs signals must be set and held at valid logic levels (not floating) for a minimum time
of tINACTMAX.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
22
IDT74SSTUAE32866A
7120/4
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
RESET
DCS
CSR
n
n +1
n+2
n+3
n+4
CLK
CLK
tACT
tH
tSU
(1)
D1 - D14
tPDM, tPDMSS
CLK to Q
Q1 - Q14
tSU
tH
(1,2)
PARIN
tPD
CLK to PPO
PPO
(not used)
tPHL
CLK to QERR
tPHL, tPLH
CLK to QERR
(3)
QERR
Data to QERR Latency
H, L, or X
H or L
Timing Diagram for the Second IDT74SSTUAE32866A (1:2 Register-B Configuration) Device Used in a Pair; C0 = 1, C1 = 1, RESET
Switches from L to H
NOTES:
1.After RESET is switched from LOW to HIGH, all data and PAR_IN inputs signals must be set and held low for a minimum time of tactmax, to avoid false
error.
2.PAR_IN is driven from PPO of the first SSTUAF32866 device.
3.If the data is clocked in on the n clock pulse, the QERR output signal will be generated on the n+2 clock pulse, and it will be valid on the n+3 clock pulse.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
23
IDT74SSTUAE32866A
7120/4
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
Timing Diagram for the Second IDT74SSTUAE32866A (1:2 Register-B Configuration) Device Used in a Pair; C0 = 1, C1 = 1, RESET
Held HIGH
NOTES:
1.If the data is clocked in on the n clock pulse, the QERR output signal will be generated on the n+1 clock pulse, and it will be valid on the n+2 clock pulse.
If an error occurs and the QERR output is driven low, it stays latched low for a minimum of two clock cycles or until RESET is driven low.
2.PAR_IN is driven from PPO of the first SSTUAF32866 device.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
24
IDT74SSTUAE32866A
7120/4
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Register Timing
RESET
tINACT
(1)
DCS
(1)
CSR
CLK
CLK
(1)
(1)
(1)
D1 - D14
tRPHL
RESET to Q
Q1 - Q14
(1)
PARIN
tRPHL
RESET to PPO
PPO
(not used)
QERR
tRPLH
RESET to QERR
H, L, or X
H or L
Timing Diagram for the First IDT74SSTUAE32866A (1:2 Register-A Configuration) Device Used in a Pair; C0 = 1, C1 = 1; RESET
Switches from H to L
NOTE:
1.After RESET is switched from HIGH to LOW, all data and clock inputs signals must be set and held at valid logic levels (not floating) for a minimum time
of tINACTMAX.
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
25
IDT74SSTUAE32866A
7120/4
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Test Circuits and Waveforms (VDD = 1.5V ± 0.075V)
VDD/2
VDD
DUT
R L = 1KΩ
TL = 50Ω
CLK
CLK
CLK Inputs
ZO = 50Ω
Test
Point
ZO = 50Ω
Test
Point
CLK Inputs
Test Point
CL = 30 pF
Test
Point
CLK
TL = 350ps, 50Ω
Out
DUT
RL = 50Ω
ZO = 50Ω
Out
CLK
R L = 1KΩ
Test Point
RL = 100Ω
Test Point
Production-Test Load Circuit
Simulation Load Circuit
CLK
tPLH
VDD
LVCMOS
RESET
Input
VDD/2
V ICR
V ICR
CLK
V ID
tPHL
V OH
Output
VDD/2
V TT
V TT
V OL
0V
tACT
tINACT
Voltage Waveforms - Propagation Delay Times
90%
IDD
10%
LVCMOS
RESET
Input
Voltage and Current Waveforms Inputs Active and Inactive
Times
VIH
VDD/2
VIL
tRPHL
VOH
Output
VTT
VOL
tW
Input
VICR
VICR
Voltage Waveforms - Propagation Delay Times
VID
NOTES:
1. CL includes probe and jig capacitance.
2. IDD tested with clock and data inputs held at VDD or GND, and
Io = 0mA
3. All input pulses are supplied by generators having the following
characteristics: PRR ≤10MHz, Zo = 50Ω, input slew rate = 1 V/ns
±20% (unless otherwise specified).
4. The outputs are measured one at a time with one transition per
measurement.
5. VTT = VREF = VDD/2
6. VIH = VREF + 175mV (AC voltage levels) for differential inputs.
VIH = VDD for LVCMOS input.
7. VIL = VREF - 175mV (AC voltage levels) for differential inputs.
VIL = GND for LVCMOS input.
8. VID = 600mV.
9. tPLH and tPHL are the same as tPDM.
Voltage Waveforms - Pulse Duration
CLK
VID
VICR
CLK
tSU
tH
VIH
Input
VREF
VREF
VIL
Voltage Waveforms - Setup and Hold Times
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
26
IDT74SSTUAE32866A
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IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Test Circuits and Waveforms (VDD = 1.5V ± 0.075V)
VDD
DUT
VDD
DUT
RL = 50Ω
Out
RL = 1KΩ
Out
Test Point
Test Point
CL = 10 pF
CL = 10 pF
Load Circuit: Error Output Measurements
Load Circuit: High-to-Low Slew-Rate Adjustment
Output
LVCMOS
RESET
Input
VOH
80%
VCC
VCC/2
0V
tPLH
VOH
20%
dv_f
0.15V
Output
Waveform 2
VOL
0V
dt_f
Voltage Waveforms: Open Drain Output Low-to-High
Transition Time (with respect to RESET input)
Voltage Waveforms: High-to-Low Slew-Rate Adjustment
Timing
Inputs
DUT
VICR
VICR
VI(PP)
tHL
Out
Test Point
CL = 10 pF
VCC/2
VOL
Voltage Waveforms: Open Drain Output High-to-Low
Transition Time (with respect to clock inputs)
Load Circuit: Low-to-High Slew-Rate Adjustment
Timing
Inputs
dt_r
VOH
dv_r
VCC
Output
Waveform 1
RL = 50Ω
80%
VICR
VICR
VI(PP)
tHL
VOH
Output
Waveform 2
20%
Output
VOL
0.15V
0V
Voltage Waveforms: Open Drain Output Low-to-High
Transition Time (with respect to clock inputs)
Voltage Waveforms: Low-to-High Slew-Rate Adjustment
NOTES:
1. CL includes probe and jig capacitance.
2. All input pulses are supplied by generators having the following characteristics: PRR ≤10MHz, Zo = 50Ω, input
slew rate = 1 V/ns ±20% (unless otherwise specified).
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
27
IDT74SSTUAE32866A
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IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Test Circuits and Waveforms (VDD = 1.5V ± 0.075V)
DUT
Out
Test Point
CL = 5 pF
RL = 1KΩ
Load Circuit: Partial-Parity-Out Load Circuit
CLK
VICR
VICR
CLK
tPLH
VI(P-P)
tPHL
VOH
Output
VTT
VTT
VOL
Load Circuit: Partial-Parity-Out Voltage Waveforms Propagation Delay Times (with respect to clock inputs)
LVCMOS
RESET
Input
VIH
VDD/2
VIL
tRPHL
VOH
VTT
Output
VOL
Load Circuit: Partial-Parity-Out Voltage Waveforms Propagation Delay Times (with respect to RESET input)
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
28
IDT74SSTUAE32866A
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IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Package Outline and Package Dimensions - BGA
Package dimensions are kept current with JEDEC Publication No. 95
C
SEATING
PLANE
Numeric Designations
for Horizontal Grid
A1
b REF
T
4
3
2
1
A
B
C
D
Alpha Designations
for Vertical Grid
(Letters I, O, Q, and
S not used)
D
d TYP
D1
-e- TYP
TOP VIEW
E
c REF
-e- TYP
h TYP
0.12 C
E1
ALL DIMENSIONS IN MILLIMETERS
----- BALL GRID ----Max.
T
e
HORIZ
VERT
TOTAL
d
Min/Max
Min/Max
13.50 Bsc
5.50 Bsc
1.20/1.40
0.80 Bsc
6
16
96
0.40/0.50
11.50 Bsc
5.00 Bsc
1.00/1.20
0.65 Bsc
6
16
96
0.35/0.45
Note: Ball grid total indicates maximum ball count for package. Lesser quantity may be used.
D
E
h
Min/Max
0.25/0.41
0.25/0.35
REF. DIMENSIONS
b
c
0.75
0.875
* Source Ref.: JEDEC Publication 95,
0.75
0.875
MO-205
10-0055C
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
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IDT74SSTUAE32866A
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IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Ordering Information
IDT
XX
SSTUAE XX
Family
Temp. Range
XXX
XX
Device Type Package
X
Shipping
Carrier
8
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
30
Tape and Reel
BFG
Low Profile, Fine Pitch, Ball Grid Array - Green
866A
25-Bit Configurable Registered Buffer for DDR2
32
Double Density
74
0°C to +70°C (Commercial)
IDT74SSTUAE32866A
7120/4
IDT74SSTUAE32866A
25-BIT CONFIGURABLE REGISTERED BUFFER FOR DDR2
COMMERCIAL TEMPERATURE GRADE
Innovate with IDT and accelerate your future networks. Contact:
www.IDT.com
For Sales
800-345-7015
408-284-8200
Fax: 408-284-2775
Corporate Headquarters
Asia Pacific and Japan
Europe
Integrated Device Technology, Inc.
6024 Silver Creek Valley Road
San Jose, CA 95138
United States
800 345 7015
+408 284 8200 (outside U.S.)
Integrated Device Technology
Singapore (1997) Pte. Ltd.
Reg. No. 199707558G
435 Orchard Road
#20-03 Wisma Atria
Singapore 238877
+65 6 887 5505
IDT Europe, Limited
Prime House
Barnett Wood Lane
Leatherhead, Surrey
United Kingdom KT22 7DE
+44 1372 363 339
© 2006 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. IDT and the IDT logo are trademarks of Integrated Device
Technology, Inc. Accelerated Thinking is a service mark of Integrated Device Technology, Inc. All other brands, product names and marks are or may be trademarks or registered
trademarks used to identify products or services of their respective owners.
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