CY7C1568XV18, CY7C1570XV18: 72-Mbit DDR II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency) Datasheet.pdf

CY7C1568XV18/CY7C1570XV18
72-Mbit DDR II+ Xtreme SRAM Two-Word
Burst Architecture (2.5 Cycle Read Latency)
72-Mbit DDR II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle Read Latency)
Features
Configurations
■
72-Mbit density (4M × 18, 2M × 36)
With Read Cycle Latency of 2.5 cycles:
■
633 MHz clock for high bandwidth
CY7C1568XV18 – 4M × 18
■
Two-word burst for reducing address bus frequency
CY7C1570XV18 – 2M × 36
■
Double data rate (DDR) interfaces (data transferred at
1266 MHz) at 633 MHz
Functional Description
■
Available in 2.5 clock cycle latency
■
Two input clocks (K and K) for precise DDR timing
❐ SRAM uses rising edges only
■
Echo clocks (CQ and CQ) simplify data capture in high speed
systems
■
Data valid pin (QVLD) to indicate valid data on the output
■
Synchronous internally self-timed writes
■
DDR II+ Xtreme operates with 2.5 cycle read latency when
DOFF is asserted HIGH
■
Operates similar to DDR I device with 1 cycle read latency when
DOFF is asserted LOW
■
Core VDD = 1.8 V ± 0.1 V; I/O VDDQ = 1.4 V to 1.6 V
❐ Supports 1.5 V I/O supply
■
HSTL inputs and variable drive HSTL output buffers
■
Available in 165-ball fine-pitch ball grid array (FBGA) package
(13 × 15 × 1.4 mm)
■
Offered in Pb-free packages
■
JTAG 1149.1 compatible test access port
■
Phase-locked loop (PLL) for accurate data placement
The CY7C1568XV18 and CY7C1570XV18 are 1.8 V
synchronous pipelined SRAMs equipped with DDR II+
architecture. The DDR II+ consists of an SRAM core with
advanced synchronous peripheral circuitry. Addresses for read
and write are latched on alternate rising edges of the input (K)
clock. Write data is registered on the rising edges of both K and
K. Read data is driven on the rising edges of K and K. Each
address location is associated with two 18-bit words
(CY7C1568XV18), or 36-bit words (CY7C1570XV18) that burst
sequentially into or out of the device.
Asynchronous inputs include an output impedance matching
input (ZQ). Synchronous data outputs (Q, sharing the same
physical pins as the data inputs D) are tightly matched to the two
output echo clocks CQ/CQ, eliminating the need for separately
capturing data from each individual DDR SRAM in the system
design.
All synchronous inputs pass through input registers controlled by
the K or K input clocks. All data outputs pass through output
registers controlled by the K or K input clocks. Writes are
conducted with on-chip synchronous self-timed write circuitry.
For a complete list of related documentation, click here.
Selection Guide
Description
633 MHz
600 MHz
Unit
633
600
MHz
× 18
965
910
mA
× 36
1230
1165
Maximum operating frequency
Maximum operating current
Cypress Semiconductor Corporation
Document Number: 001-70203 Rev. *F
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised June 15, 2016
CY7C1568XV18/CY7C1570XV18
Logic Block Diagram – CY7C1568XV18
Write
Reg
CLK
Gen.
DOFF
R/W
BWS[1:0]
18
Output
Logic
Control
R/W
Read Data Reg.
36
VREF
Read Add. Decode
K
2M x 18 Array
K
Write
Reg
2M x 18 Array
LD
Address
Register
Write Add. Decode
21
A(20:0)
Control
Logic
18
18
Reg.
Reg. 18
Reg.
18
CQ
CQ
18
DQ[17:0]
QVLD
Logic Block Diagram – CY7C1570XV18
Write
Reg
CLK
Gen.
DOFF
VREF
R/W
BWS[3:0]
Read Add. Decode
K
1M x 36 Array
K
Write
Reg
1M x 36 Array
LD
Address
Register
Write Add. Decode
20
A(19:0)
36
Output
Logic
Control
R/W
Read Data Reg.
72
Control
Logic
36
36
Reg.
Reg. 36
Reg.
36
CQ
CQ
36
DQ[35:0]
QVLD
Document Number: 001-70203 Rev. *F
Page 2 of 28
CY7C1568XV18/CY7C1570XV18
Contents
Pin Configurations ........................................................... 4
Pin Definitions .................................................................. 5
Functional Overview ........................................................ 6
Read Operations ......................................................... 6
Write Operations ......................................................... 6
Byte Write Operations ................................................. 6
DDR Operation ............................................................ 6
Depth Expansion ......................................................... 7
Programmable Impedance .......................................... 7
Echo Clocks ................................................................ 7
Valid Data Indicator (QVLD) ........................................ 7
PLL .............................................................................. 7
Application Example ........................................................ 7
Truth Table ........................................................................ 8
Write Cycle Descriptions ................................................. 8
Write Cycle Descriptions ................................................. 9
IEEE 1149.1 Serial Boundary Scan (JTAG) .................. 10
Disabling the JTAG Feature ...................................... 10
Test Access Port ....................................................... 10
Performing a TAP Reset ........................................... 10
TAP Registers ........................................................... 10
TAP Instruction Set ................................................... 10
TAP Controller State Diagram ....................................... 12
TAP Controller Block Diagram ...................................... 13
TAP Electrical Characteristics ...................................... 13
TAP AC Switching Characteristics ............................... 14
TAP Timing and Test Conditions .................................. 15
Identification Register Definitions ................................ 16
Scan Register Sizes ....................................................... 16
Instruction Codes ........................................................... 16
Document Number: 001-70203 Rev. *F
Boundary Scan Order .................................................... 17
Power Up Sequence in DDR II+ Xtreme SRAM ............ 18
Power Up Sequence ................................................. 18
PLL Constraints ......................................................... 18
Maximum Ratings ........................................................... 19
Operating Range ............................................................. 19
Neutron Soft Error Immunity ......................................... 19
Electrical Characteristics ............................................... 19
DC Electrical Characteristics ..................................... 19
AC Electrical Characteristics ..................................... 21
Capacitance .................................................................... 21
Thermal Resistance ........................................................ 21
AC Test Loads and Waveforms ..................................... 21
Switching Characteristics .............................................. 22
Switching Waveforms .................................................... 23
Read/Write/Deselect Sequence ................................ 23
Ordering Information ...................................................... 24
Ordering Code Definitions ......................................... 24
Package Diagram ............................................................ 25
Acronyms ........................................................................ 26
Document Conventions ................................................. 26
Units of Measure ....................................................... 26
Document History Page ................................................. 27
Sales, Solutions, and Legal Information ...................... 28
Worldwide Sales and Design Support ....................... 28
Products .................................................................... 28
PSoC®Solutions ....................................................... 28
Cypress Developer Community ................................. 28
Technical Support ..................................................... 28
Page 3 of 28
CY7C1568XV18/CY7C1570XV18
Pin Configurations
The pin configurations for CY7C1568XV18 and CY7C1570XV18 follow. [1]
Figure 1. 165-ball FBGA (13 × 15 × 1.4 mm) pinout
CY7C1568XV18 (4M × 18)
1
2
3
4
5
6
7
8
9
10
11
A
CQ
A
A
R/W
BWS1
K
NC/144M
LD
A
A
CQ
B
NC
DQ9
NC
A
NC/288M
K
BWS0
A
NC
NC
DQ8
C
NC
NC
NC
VSS
A
NC
A
VSS
NC
DQ7
NC
D
NC
NC
DQ10
VSS
VSS
VSS
VSS
VSS
NC
NC
NC
E
NC
NC
DQ11
VDDQ
VSS
VSS
VSS
VDDQ
NC
NC
DQ6
F
NC
DQ12
NC
VDDQ
VDD
VSS
VDD
VDDQ
NC
NC
DQ5
G
NC
NC
DQ13
VDDQ
VDD
VSS
VDD
VDDQ
NC
NC
NC
H
DOFF
VREF
VDDQ
VDDQ
VDD
VSS
VDD
VDDQ
VDDQ
VREF
ZQ
J
NC
NC
NC
VDDQ
VDD
VSS
VDD
VDDQ
NC
DQ4
NC
K
NC
NC
DQ14
VDDQ
VDD
VSS
VDD
VDDQ
NC
NC
DQ3
L
NC
DQ15
NC
VDDQ
VSS
VSS
VSS
VDDQ
NC
NC
DQ2
M
NC
NC
NC
VSS
VSS
VSS
VSS
VSS
NC
DQ1
NC
N
NC
NC
DQ16
VSS
A
A
A
VSS
NC
NC
NC
P
NC
NC
DQ17
A
A
QVLD
A
A
NC
NC
DQ0
R
TDO
TCK
A
A
A
NC
A
A
A
TMS
TDI
9
10
11
CY7C1570XV18 (2M × 36)
1
2
3
4
A
CQ
B
NC
C
D
5
6
7
8
NC/144M
A
DQ27
DQ18
R/W
BWS2
K
BWS1
LD
A
A
CQ
A
BWS3
K
BWS0
A
NC
NC
DQ8
NC
NC
DQ28
VSS
A
NC
A
VSS
NC
DQ17
DQ7
NC
DQ29
DQ19
VSS
VSS
VSS
VSS
VSS
NC
NC
DQ16
E
NC
NC
DQ20
VDDQ
VSS
VSS
VSS
VDDQ
NC
DQ15
DQ6
F
NC
DQ30
DQ21
VDDQ
VDD
VSS
VDD
VDDQ
NC
NC
DQ5
G
NC
DQ31
DQ22
VDDQ
VDD
VSS
VDD
VDDQ
NC
NC
DQ14
H
DOFF
VREF
VDDQ
VDDQ
VDD
VSS
VDD
VDDQ
VDDQ
VREF
ZQ
J
NC
NC
DQ32
VDDQ
VDD
VSS
VDD
VDDQ
NC
DQ13
DQ4
K
NC
NC
DQ23
VDDQ
VDD
VSS
VDD
VDDQ
NC
DQ12
DQ3
L
NC
DQ33
DQ24
VDDQ
VSS
VSS
VSS
VDDQ
NC
NC
DQ2
M
NC
NC
DQ34
VSS
VSS
VSS
VSS
VSS
NC
DQ11
DQ1
N
NC
DQ35
DQ25
VSS
A
A
A
VSS
NC
NC
DQ10
P
NC
NC
DQ26
A
A
QVLD
A
A
NC
DQ9
DQ0
R
TDO
TCK
A
A
A
NC
A
A
A
TMS
TDI
Note
1. NC/144M and NC/288M are not connected to the die and can be tied to any voltage level.
Document Number: 001-70203 Rev. *F
Page 4 of 28
CY7C1568XV18/CY7C1570XV18
Pin Definitions
Pin
Name
I/O
Pin Description
DQ[x:0]
Input Output- Data input output signals. Inputs are sampled on the rising edge of K and K clocks during valid write
Synchronous operations. These pins drive out the requested data when the read operation is active. Valid data is driven
out on the rising edge of both the K and K clocks during read operations. When read access is deselected,
Q[x:0] are automatically tristated.
CY7C1568XV18  DQ[17:0]
CY7C1570XV18  DQ[35:0]
LD
InputSynchronous load. Sampled on the rising edge of the K clock. This input is brought LOW when a bus
Synchronous cycle sequence is defined. This definition includes address and read/write direction. All transactions
operate on a burst of 2 data. LD must meet the setup and hold times around edge of K.
BWS0,
BWS1,
BWS2,
BWS3
InputByte Write Select 0, 1, 2, and 3  Active LOW. Sampled on the rising edge of the K and K clocks during
Synchronous write operations. Used to select which byte is written into the device during the current portion of the write
operations. Bytes not written remain unaltered.
CY7C1568XV18 BWS0 controls D[8:0] and BWS1 controls D[17:9].
CY7C1570XV18 BWS0 controls D[8:0], BWS1 controls D[17:9], BWS2 controls D[26:18] and BWS3 controls
D[35:27].
All the Byte Write Selects are sampled on the same edge as the data. Deselecting a Byte Write Select
ignores the corresponding byte of data and it is not written into the device.
A
InputAddress inputs. Sampled on the rising edge of the K clock during active read and write operations. These
Synchronous address inputs are multiplexed for both read and write operations. Internally, the device is organized as
4M × 18 (2 arrays each of 2M × 18) for CY7C1568XV18, and 2M × 36 (2 arrays each of 1M × 36) for
CY7C1570XV18. The address pins (A) can be assigned any bit order.
R/W
InputSynchronous read or write input. When LD is LOW, this input designates the access type (read when
Synchronous R/W is HIGH, write when R/W is LOW) for loaded address. R/W must meet the setup and hold times
around edge of K.
QVLD
Valid output
indicator
Valid output indicator. The Q Valid indicates valid output data. QVLD is edge aligned with CQ and CQ.
K
Input Clock
Positive input clock input. The rising edge of K is used to capture synchronous inputs to the device and
to drive out data through Q[x:0]. All accesses are initiated on the rising edge of K.
K
Input Clock
Negative input clock input. K is used to capture synchronous data being presented to the device and
to drive out data through Q[x:0].
CQ
Echo Clock
Synchronous echo clock outputs. This is a free running clock and is synchronized to the input clock
(K) of the DDR II+. The timing for the echo clocks is shown in the Switching Characteristics on page 22.
CQ
Echo Clock
Synchronous echo clock outputs. This is a free running clock and is synchronized to the input clock
(K) of the DDR II+. The timing for the echo clocks is shown in the Switching Characteristics on page 22.
ZQ
Input
Output impedance matching input. This input is used to tune the device outputs to the system data
bus impedance. CQ, CQ, and Q[x:0] output impedance are set to 0.2 × RQ, where RQ is a resistor
connected between ZQ and ground. Alternatively, this pin can be connected directly to VDDQ, which
enables the minimum impedance mode. This pin cannot be connected directly to GND or left unconnected.
DOFF
Input
PLL Turn Off  Active LOW. Connecting this pin to ground turns off the PLL inside the device. The timing
in the PLL turned off operation differs from those listed in this data sheet. For normal operation, this pin
can be connected to a pull up through a 10 k or less pull up resistor. The device behaves in DDR I mode
when the PLL is turned off. In this mode, the device can be operated at a frequency of up to 167 MHz
with DDR I timing.
TDO
Output
Test data out (TDO) pin for JTAG
TCK
Input
Test clock (TCK) pin for JTAG
TDI
Input
Test data in (TDI) pin for JTAG
Document Number: 001-70203 Rev. *F
Page 5 of 28
CY7C1568XV18/CY7C1570XV18
Pin Definitions (continued)
Pin
Name
I/O
Pin Description
TMS
Input
Test mode select (TMS) pin for JTAG
NC
N/A
Not connected to the die. Can be tied to any voltage level.
NC/144
M
Input
Not connected to the die. Can be tied to any voltage level.
NC/288
M
Input
Not connected to the die. Can be tied to any voltage level.
VREF
VDD
VSS
VDDQ
InputReference
Reference voltage input. Static input used to set the reference level for HSTL inputs, outputs, and AC
measurement points.
Power Supply Power supply inputs to the core of the device.
Ground
Ground for the device.
Power Supply Power supply inputs for the outputs of the device.
Functional Overview
The CY7C1568XV18, and CY7C1570XV18 are synchronous
pipelined Burst SRAMs equipped with a DDR interface, which
operates with a read latency of two and half cycles when DOFF
pin is tied HIGH. When DOFF pin is set LOW or connected to
VSS the device behaves in DDR I mode with a read latency of
one clock cycle.
between devices without the insertion of wait states in a depth
expanded memory.
Write Operations
All synchronous control (R/W, LD, BWS[X:0]) inputs pass through
input registers controlled by the rising edge of the input clock (K).
Write operations are initiated by asserting R/W LOW and LD
LOW at the rising edge of the positive input clock (K). The
address presented to address inputs is stored in the write
address register. On the following K clock rise, the data
presented to D[17:0] is latched and stored into the 18-bit write
data register, provided BWS[1:0] are both asserted active. On the
subsequent rising edge of the negative input clock (K) the
information presented to D[17:0] is also stored into the write data
register, provided BWS[1:0] are both asserted active. The 36 bits
of data are then written into the memory array at the specified
location. Write accesses can be initiated on every rising edge of
the positive input clock (K). Doing so pipelines the data flow such
that 18 bits of data can be transferred into the device on every
rising edge of the input clocks (K and K).
CY7C1568XV18 is described in the following sections. The
same basic descriptions apply to CY7C1570XV18.
When the write access is deselected, the device ignores all
inputs after the pending write operations have been completed.
Read Operations
Byte Write Operations
The CY7C1568XV18 is organized internally as two arrays of
2M × 18. Accesses are completed in a burst of 2 sequential
18-bit data words. Read operations are initiated by asserting
R/W HIGH and LD LOW at the rising edge of the positive input
clock (K). The address presented to the address inputs is stored
in the read address register. Following the next two K clock rise,
the corresponding 18-bit word of data from this address location
is driven onto the Q[17:0] using K as the output timing reference.
On the subsequent rising edge of K, the next 18-bit data word is
driven onto the Q[17:0]. The requested data is valid 0.45 ns from
the rising edge of the input clock (K and K). To maintain the
internal logic, each read access must be allowed to complete.
Read accesses can be initiated on every rising edge of the
positive input clock (K).
Byte write operations are supported by the CY7C1568XV18. A
write operation is initiated as described in the Write Operations
section. The bytes that are written are determined by BWS0 and
BWS1, which are sampled with each set of 18-bit data words.
Asserting the appropriate Byte Write Select input during the data
portion of a write latches the data being presented and writes it
into the device. Deasserting the Byte Write Select input during
the data portion of a write enables the data stored in the device
for that byte to remain unaltered. This feature can be used to
simplify read, modify, or write operations to a byte write
operation.
Accesses are initiated on the rising edge of the positive input
clock (K). All synchronous input and output timing is referenced
from the rising edge of the input clocks (K and K).
All synchronous data inputs (D[x:0]) pass through input registers
controlled by the rising edge of the input clocks (K and K). All
synchronous data outputs (Q[x:0]) pass through output registers
controlled by the rising edge of the input clocks (K and K).
When read access is deselected, the CY7C1568XV18 first
completes the pending read transactions. Synchronous internal
circuitry automatically tristates the output following the next rising
edge of the negative input clock (K). This enables for a transition
Document Number: 001-70203 Rev. *F
DDR Operation
The CY7C1568XV18 enables high-performance operation
through high clock frequencies (achieved through pipelining) and
DDR mode of operation. The CY7C1568XV18 requires two No
Operation (NOP) cycle during transition from a read to a write
cycle. At higher frequencies, some applications require third
NOP cycle to avoid contention.
Page 6 of 28
CY7C1568XV18/CY7C1570XV18
If a read occurs after a write cycle, address and data for the write
are stored in registers. The write information is stored because
the SRAM cannot perform the last word write to the array without
conflicting with the read. The data stays in this register until the
next write cycle occurs. On the first write cycle after the read(s),
the stored data from the earlier write is written into the SRAM
array. This is called a Posted write.
If a read is performed on the same address on which a write is
performed in the previous cycle, the SRAM reads out the most
current data. The SRAM does this by bypassing the memory
array and reading the data from the registers.
Depth Expansion
Depth expansion requires replicating the LD control signal for
each bank. All other control signals can be common between
banks as appropriate.
Programmable Impedance
An external resistor, RQ, must be connected between the ZQ pin
on the SRAM and VSS to allow the SRAM to adjust its output
driver impedance. The value of RQ must be 5 × the value of the
intended line impedance driven by the SRAM. The allowable
range of RQ to guarantee impedance matching with a tolerance
of ±15% is between 175  and 350 , with VDDQ = 1.5 V. The
output impedance is adjusted every 1024 cycles upon power up
to account for drifts in supply voltage and temperature.
Echo Clocks
Echo clocks are provided on the DDR II+ to simplify data capture
on high-speed systems. Two echo clocks are generated by the
DDR II+. CQ is referenced with respect to K and CQ is
referenced with respect to K. These are free-running clocks and
are synchronized to the input clock of the DDR II+. The timing for
the echo clocks is shown in the Switching Characteristics on
page 22.
Valid Data Indicator (QVLD)
QVLD is provided on the DDR II+ to simplify data capture on high
speed systems. The QVLD is generated by the DDR II+ device
along with data output. This signal is also edge aligned with the
echo clock and follows the timing of any data pin. This signal is
asserted half a cycle before valid data arrives.
PLL
These chips use a PLL that is designed to function between
120 MHz and the specified maximum clock frequency. During
power up, when the DOFF is tied HIGH, the PLL is locked after
100 s of stable clock. The PLL can also be reset by slowing or
stopping the input clock K and K for a minimum of 30 ns.
However, it is not necessary to reset the PLL to lock to the
desired frequency. The PLL automatically locks 100 s after a
stable clock is presented. The PLL may be disabled by applying
ground to the DOFF pin. When the PLL is turned off, the device
behaves in DDR I mode (with one cycle latency and a longer
access time). For information, refer to the application note, PLL
Considerations in QDRII/DDRII/QDRII+/DDRII+.
Application Example
Figure 2 shows two DDR II+ used in an application.
Figure 2. Application Example (Width Expansion)
SRAM#1
DQ[x:0]
A
LD
R/W
ZQ
CQ/CQ
BWS K
K
RQ
SRAM#2
DQ[x:0]
A
LD
R/W
ZQ
CQ/CQ
BWS K
RQ
K
DQ[2x:0]
ADDRESS
LD
R/W
BWS
CLKIN1/CLKIN1
CLKIN2/CLKIN2
SOURCE K
SOURCE K
FPGA / ASIC
Document Number: 001-70203 Rev. *F
Page 7 of 28
CY7C1568XV18/CY7C1570XV18
Truth Table
The truth table for the CY7C1568XV18, and CY7C1570XV18 follows. [2, 3, 4, 5, 6, 7]
Operation
K
LD
R/W
Write cycle:
Load address; wait one cycle;
input write data on consecutive K and K rising edges.
L–H
L
L
D(A) at K(t + 1) 
D(A+1) at K(t + 1) 
Read cycle: (2.5 cycle Latency)
Load address; wait two and half cycles;
read data on consecutive K and K rising edges.
L–H
L
H
Q(A) at K(t + 2)
Q(A+1) at K(t + 3) 
NOP: No operation
L–H
H
X
High Z
High Z
Stopped
X
X
Previous State
Previous State
Standby: Clock stopped
DQ
DQ
Write Cycle Descriptions
The write cycle description table for CY7C1568XV18 follows. [2, 8]
BWS0
BWS1
K
K
L
L
L–H
–
L
L
–
L
H
L–H
L
H
–
H
L
L–H
H
L
–
H
H
L–H
H
H
–
Comments
During the data portion of a write sequence
CY7C1568XV18 both bytes (D[17:0]) are written into the device.
L–H During the data portion of a write sequence:
CY7C1568XV18 both bytes (D[17:0]) are written into the device.
–
During the data portion of a write sequence:
CY7C1568XV18 only the lower byte (D[8:0]) is written into the device, D[17:9] remains unaltered.
L–H During the data portion of a write sequence
CY7C1568XV18 only the lower byte (D[8:0]) is written into the device, D[17:9] remains unaltered.
–
During the data portion of a write sequence
CY7C1568XV18 only the upper byte (D[17:9]) is written into the device, D[8:0] remains unaltered.
L–H During the data portion of a write sequence
CY7C1568XV18 only the upper byte (D[17:9]) is written into the device, D[8:0] remains unaltered.
–
No data is written into the devices during this portion of a write operation.
L–H No data is written into the devices during this portion of a write operation.
Notes
2. X = “Don’t Care,” H = Logic HIGH, L = Logic LOW, represents rising edge.
3. Device powers up deselected with the outputs in a tristate condition.
4. “A” represents address location latched by the devices when transaction was initiated. A + 1 represents the address sequence in the burst.
5. “t” represents the cycle at which a read/write operation is started. t + 1 and t + 2 are the first and second clock cycles succeeding the “t” clock cycle.
6. Data inputs are registered at K and K rising edges. Data outputs are delivered on K and K rising edges as well.
7. Ensure that when clock is stopped K = K = HIGH. This is not essential, but permits most rapid restart by overcoming transmission line charging symmetrically.
8. Is based on a write cycle that was initiated in accordance with the Truth Table. BWS0, BWS1, BWS2, and BWS3 can be altered on different portions of a write cycle,
as long as the setup and hold requirements are achieved.
Document Number: 001-70203 Rev. *F
Page 8 of 28
CY7C1568XV18/CY7C1570XV18
Write Cycle Descriptions
The write cycle description table for CY7C1570XV18 follows. [9, 10]
BWS0
BWS1
BWS2
BWS3
K
K
Comments
L
L
L
L
L–H
–
During the data portion of a write sequence, all four bytes (D[35:0]) are written into
the device.
L
L
L
L
–
L
H
H
H
L–H
L
H
H
H
–
H
L
H
H
L–H
H
L
H
H
–
H
H
L
H
L–H
H
H
L
H
–
H
H
H
L
L–H
H
H
H
L
–
H
H
H
H
L–H
H
H
H
H
–
L–H During the data portion of a write sequence, all four bytes (D[35:0]) are written into
the device.
–
During the data portion of a write sequence, only the lower byte (D[8:0]) is written
into the device. D[35:9] remains unaltered.
L–H During the data portion of a write sequence, only the lower byte (D[8:0]) is written
into the device. D[35:9] remains unaltered.
–
During the data portion of a write sequence, only the byte (D[17:9]) is written into
the device. D[8:0] and D[35:18] remains unaltered.
L–H During the data portion of a write sequence, only the byte (D[17:9]) is written into
the device. D[8:0] and D[35:18] remains unaltered.
–
During the data portion of a write sequence, only the byte (D[26:18]) is written into
the device. D[17:0] and D[35:27] remains unaltered.
L–H During the data portion of a write sequence, only the byte (D[26:18]) is written into
the device. D[17:0] and D[35:27] remains unaltered.
–
During the data portion of a write sequence, only the byte (D[35:27]) is written into
the device. D[26:0] remains unaltered.
L–H During the data portion of a write sequence, only the byte (D[35:27]) is written into
the device. D[26:0] remains unaltered.
–
No data is written into the device during this portion of a write operation.
L–H No data is written into the device during this portion of a write operation.
Notes
9. X = “Don’t Care,” H = Logic HIGH, L = Logic LOW, represents rising edge.
10. Is based on a write cycle that was initiated in accordance with the Truth Table on page 8. BWS0, BWS1, BWS2, and BWS3 can be altered on different portions of a
write cycle, as long as the setup and hold requirements are achieved.
Document Number: 001-70203 Rev. *F
Page 9 of 28
CY7C1568XV18/CY7C1570XV18
IEEE 1149.1 Serial Boundary Scan (JTAG)
These SRAMs incorporate a serial boundary scan Test Access
Port (TAP) in the FBGA package. This part is fully compliant with
IEEE Standard #1149.1-2001. The TAP operates using JEDEC
standard 1.8 V I/O logic levels.
Disabling the JTAG Feature
It is possible to operate the SRAM without using the JTAG
feature. To disable the TAP controller, TCK must be tied LOW
(VSS) to prevent clocking of the device. TDI and TMS are
internally pulled up and may be unconnected. They may
alternatively be connected to VDD through a pull up resistor. TDO
must be left unconnected. Upon power up, the device comes up
in a reset state, which does not interfere with the operation of the
device.
Test Access Port
Test Clock
The test clock is used only with the TAP controller. All inputs are
captured on the rising edge of TCK. All outputs are driven from
the falling edge of TCK.
Test Mode Select (TMS)
The TMS input is used to give commands to the TAP controller
and is sampled on the rising edge of TCK. This pin may be left
unconnected if the TAP is not used. The pin is pulled up
internally, resulting in a logic HIGH level.
Test Data-In (TDI)
The TDI pin is used to serially input information into the registers
and can be connected to the input of any of the registers. The
register between TDI and TDO is chosen by the instruction that
is loaded into the TAP instruction register. For information about
loading the instruction register, see the TAP Controller State
Diagram on page 12. TDI is internally pulled up and can be
unconnected if the TAP is unused in an application. TDI is
connected to the most significant bit (MSB) on any register.
Test Data-Out (TDO)
The TDO output pin is used to serially clock data out from the
registers. The output is active, depending upon the current state
of the TAP state machine (see Instruction Codes on page 16).
The output changes on the falling edge of TCK. TDO is
connected to the least significant bit (LSB) of any register.
Performing a TAP Reset
A Reset is performed by forcing TMS HIGH (VDD) for five rising
edges of TCK. This Reset does not affect the operation of the
SRAM and can be performed while the SRAM is operating. At
power up, the TAP is reset internally to ensure that TDO comes
up in a High Z state.
TAP Registers
Registers are connected between the TDI and TDO pins to scan
the data in and out of the SRAM test circuitry. Only one register
can be selected at a time through the instruction registers. Data
is serially loaded into the TDI pin on the rising edge of TCK. Data
is output on the TDO pin on the falling edge of TCK.
Document Number: 001-70203 Rev. *F
Instruction Register
Three-bit instructions can be serially loaded into the instruction
register. This register is loaded when it is placed between the TDI
and TDO pins, as shown in TAP Controller Block Diagram on
page 13. Upon power up, the instruction register is loaded with
the IDCODE instruction. It is also loaded with the IDCODE
instruction if the controller is placed in a reset state, as described
in the previous section.
When the TAP controller is in the Capture-IR state, the two least
significant bits are loaded with a binary “01” pattern to allow for
fault isolation of the board level serial test path.
Bypass Register
To save time when serially shifting data through registers, it is
sometimes advantageous to skip certain chips. The bypass
register is a single-bit register that can be placed between TDI
and TDO pins. This enables shifting of data through the SRAM
with minimal delay. The bypass register is set LOW (VSS) when
the BYPASS instruction is executed.
Boundary Scan Register
The boundary scan register is connected to all of the input and
output pins on the SRAM. Several No Connect (NC) pins are also
included in the scan register to reserve pins for higher density
devices.
The boundary scan register is loaded with the contents of the
RAM input and output ring when the TAP controller is in the
Capture-DR state and is then placed between the TDI and TDO
pins when the controller is moved to the Shift-DR state. The
EXTEST, SAMPLE/PRELOAD, and SAMPLE Z instructions can
be used to capture the contents of the input and output ring.
The Boundary Scan Order on page 17 shows the order in which
the bits are connected. Each bit corresponds to one of the bumps
on the SRAM package. The MSB of the register is connected to
TDI, and the LSB is connected to TDO.
Identification (ID) Register
The ID register is loaded with a vendor-specific, 32-bit code
during the Capture-DR state when the IDCODE command is
loaded in the instruction register. The IDCODE is hardwired into
the SRAM and can be shifted out when the TAP controller is in
the Shift-DR state. The ID register has a vendor code and other
information described in Identification Register Definitions on
page 16.
TAP Instruction Set
Eight different instructions are possible with the three-bit
instruction register. All combinations are listed in Instruction
Codes on page 16. Three of these instructions are listed as
RESERVED and must not be used. The other five instructions
are described in this section in detail.
Instructions are loaded into the TAP controller during the Shift-IR
state when the instruction register is placed between TDI and
TDO. During this state, instructions are shifted through the
instruction register through the TDI and TDO pins. To execute
the instruction after it is shifted in, the TAP controller must be
moved into the Update-IR state.
Page 10 of 28
CY7C1568XV18/CY7C1570XV18
IDCODE
The IDCODE instruction loads a vendor-specific, 32-bit code into
the instruction register. It also places the instruction register
between the TDI and TDO pins and shifts the IDCODE out of the
device when the TAP controller enters the Shift-DR state. The
IDCODE instruction is loaded into the instruction register at
power up or whenever the TAP controller is supplied a
Test-Logic-Reset state.
SAMPLE Z
The SAMPLE Z instruction connects the boundary scan register
between the TDI and TDO pins when the TAP controller is in a
Shift-DR state. The SAMPLE Z command puts the output bus
into a High Z state until the next command is supplied during the
Update IR state.
SAMPLE/PRELOAD
SAMPLE/PRELOAD is a 1149.1 mandatory instruction. When
the SAMPLE/PRELOAD instructions are loaded into the
instruction register and the TAP controller is in the Capture-DR
state, a snapshot of data on the input and output pins is captured
in the boundary scan register.
PRELOAD places an initial data pattern at the latched parallel
outputs of the boundary scan register cells before the selection
of another boundary scan test operation.
The shifting of data for the SAMPLE and PRELOAD phases can
occur concurrently when required, that is, while the data
captured is shifted out, the preloaded data can be shifted in.
BYPASS
When the BYPASS instruction is loaded in the instruction register
and the TAP is placed in a Shift-DR state, the bypass register is
placed between the TDI and TDO pins. The advantage of the
BYPASS instruction is that it shortens the boundary scan path
when multiple devices are connected together on a board.
EXTEST
The EXTEST instruction drives the preloaded data out through
the system output pins. This instruction also connects the
boundary scan register for serial access between the TDI and
TDO in the Shift-DR controller state.
EXTEST OUTPUT BUS TRISTATE
IEEE Standard 1149.1 mandates that the TAP controller be able
to put the output bus into a tristate mode.
The user must be aware that the TAP controller clock can only
operate at a frequency up to 20 MHz, while the SRAM clock
operates more than an order of magnitude faster. Because there
is a large difference in the clock frequencies, it is possible that
during the Capture-DR state, an input or output undergoes a
transition. The TAP may then try to capture a signal while in
transition (metastable state). This does not harm the device, but
there is no guarantee as to the value that is captured.
Repeatable results may not be possible.
The boundary scan register has a special bit located at bit #108.
When this scan cell, called the “extest output bus tristate,” is
latched into the preload register during the Update-DR state in
the TAP controller, it directly controls the state of the output
(Q-bus) pins, when the EXTEST is entered as the current
instruction. When HIGH, it enables the output buffers to drive the
output bus. When LOW, this bit places the output bus into a
High Z condition.
To guarantee that the boundary scan register captures the
correct value of a signal, the SRAM signal must be stabilized
long enough to meet the TAP controller’s capture setup plus hold
times (tCS and tCH). The SRAM clock input might not be captured
correctly if there is no way in a design to stop (or slow) the clock
during a SAMPLE/PRELOAD instruction. If this is an issue, it is
still possible to capture all other signals and simply ignore the
value of the CK and CK captured in the boundary scan register.
This bit can be set by entering the SAMPLE/PRELOAD or
EXTEST command, and then shifting the desired bit into that cell,
during the Shift-DR state. During Update-DR, the value loaded
into that shift-register cell latches into the preload register. When
the EXTEST instruction is entered, this bit directly controls the
output Q-bus pins. Note that this bit is preset HIGH to enable the
output when the device is powered up, and also when the TAP
controller is in the Test-Logic-Reset state.
After the data is captured, it is possible to shift out the data by
putting the TAP into the Shift-DR state. This places the boundary
scan register between the TDI and TDO pins.
Reserved
Document Number: 001-70203 Rev. *F
These instructions are not implemented but are reserved for
future use. Do not use these instructions.
Page 11 of 28
CY7C1568XV18/CY7C1570XV18
TAP Controller State Diagram
The state diagram for the TAP controller follows. [11]
1
TEST-LOGIC
RESET
0
0
TEST-LOGIC/
IDLE
1
SELECT
DR-SCAN
1
1
SELECT
IR-SCAN
0
0
1
1
CAPTURE-DR
CAPTURE-IR
0
0
SHIFT-DR
0
SHIFT-IR
1
1
EXIT1-DR
1
EXIT1-IR
0
0
PAUSE-IR
1
0
1
EXIT2-DR
0
EXIT2-IR
1
1
UPDATE-IR
UPDATE-DR
1
1
0
PAUSE-DR
0
0
0
1
0
Note
11. The 0/1 next to each state represents the value at TMS at the rising edge of TCK.
Document Number: 001-70203 Rev. *F
Page 12 of 28
CY7C1568XV18/CY7C1570XV18
TAP Controller Block Diagram
0
Bypass Register
2
Selection
Circuitry
TDI
1
0
Selection
Circuitry
Instruction Register
31
30
29
.
.
2
1
0
1
0
TDO
Identification Register
108
.
.
.
.
2
Boundary Scan Register
TCK
TAP Controller
TMS
TAP Electrical Characteristics
Over the Operating Range
Parameter [12, 13, 14]
Description
Test Conditions
Min
Max
Unit
VOH1
Output HIGH voltage
IOH =–2.0 mA
1.4
–
V
VOH2
Output HIGH voltage
IOH =–100 A
1.6
–
V
VOL1
Output LOW voltage
IOL = 2.0 mA
–
0.4
V
VOL2
Output LOW voltage
IOL = 100 A
–
0.2
V
VIH
Input HIGH voltage
VIL
Input LOW voltage
IX
Input and output load current
0.65 × VDD VDD + 0.3
GND  VI  VDD
V
–0.3
0.35 × VDD
V
–5
5
A
Notes
12. These characteristics pertain to the TAP inputs (TMS, TCK, TDI and TDO). Parallel load levels are specified in the Electrical Characteristics on page 19.
13. Overshoot: VIH(AC) < VDD + 0.3 V (Pulse width less than tTCYC/2), Undershoot: VIL(AC) > 0.3 V (Pulse width less than tTCYC/2).
14. All Voltage referenced to Ground.
Document Number: 001-70203 Rev. *F
Page 13 of 28
CY7C1568XV18/CY7C1570XV18
TAP AC Switching Characteristics
Over the Operating Range
Parameter [15, 16]
Description
Min
Max
Unit
50
–
ns
TCK clock frequency
–
20
MHz
TCK clock HIGH
20
–
ns
TCK clock LOW
20
–
ns
tTMSS
TMS setup to TCK clock rise
5
–
ns
tTDIS
TDI setup to TCK clock rise
5
–
ns
tCS
Capture setup to TCK rise
5
–
ns
tTMSH
TMS hold after TCK clock rise
5
–
ns
tTDIH
TDI hold after clock rise
5
–
ns
tCH
Capture hold after clock rise
5
–
ns
tTDOV
TCK clock LOW to TDO valid
–
10
ns
tTDOX
TCK clock LOW to TDO invalid
0
–
ns
tTCYC
TCK clock cycle time
tTF
tTH
tTL
Setup Times
Hold Times
Output Times
Notes
15. tCS and tCH refer to the setup and hold time requirements of latching data from the boundary scan register.
16. Test conditions are specified using the load in TAP AC Test Conditions. tR/tF = 1 V/ns.
Document Number: 001-70203 Rev. *F
Page 14 of 28
CY7C1568XV18/CY7C1570XV18
TAP Timing and Test Conditions
Figure 3 shows the TAP timing and test conditions. [17]
Figure 3. TAP Timing and Test Conditions
0.9V
ALL INPUT PULSES
1.8V
50
0.9V
TDO
0V
Z0 = 50
(a)
Slew Rate= 1 V/ns
CL = 20 pF
tTH
GND
tTL
Test Clock
TCK
tTMSH
tTMSS
tTCYC
Test Mode Select
TMS
tTDIS
tTDIH
Test Data In
TDI
Test Data Out
TDO
tTDOV
tTDOX
Note
17. Test conditions are specified using the load in TAP AC Test Conditions. tR/tF = 1 V/ns.
Document Number: 001-70203 Rev. *F
Page 15 of 28
CY7C1568XV18/CY7C1570XV18
Identification Register Definitions
Value
Instruction Field
CY7C1568XV18
Description
CY7C1570XV18
Revision number (31:29)
000
000
Cypress device ID (28:12)
11010111000010100
11010111000100100
Cypress JEDEC ID (11:1)
00000110100
00000110100
Allows unique identification of
SRAM vendor.
1
1
Indicates the presence of an
ID register.
ID register presence (0)
Version number.
Defines the type of SRAM.
Scan Register Sizes
Register Name
Bit Size
Instruction
3
Bypass
1
ID
32
Boundary Scan
109
Instruction Codes
Instruction
Code
Description
EXTEST
000
Captures the input and output ring contents.
IDCODE
001
Loads the ID register with the vendor ID code and places the register between TDI and
TDO. This operation does not affect SRAM operation.
SAMPLE Z
010
Captures the input and output contents. Places the boundary scan register between TDI
and TDO. Forces all SRAM output drivers to a High Z state.
RESERVED
011
Do Not Use: This instruction is reserved for future use.
SAMPLE/PRELOAD
100
Captures the input and output ring contents. Places the boundary scan register between
TDI and TDO. Does not affect the SRAM operation.
RESERVED
101
Do Not Use: This instruction is reserved for future use.
RESERVED
110
Do Not Use: This instruction is reserved for future use.
BYPASS
111
Places the bypass register between TDI and TDO. This operation does not affect SRAM
operation.
Document Number: 001-70203 Rev. *F
Page 16 of 28
CY7C1568XV18/CY7C1570XV18
Boundary Scan Order
Bit #
Bump ID
Bit #
Bump ID
Bit #
Bump ID
Bit #
Bump ID
0
6R
28
10G
56
6A
84
1J
1
6P
29
9G
57
5B
85
2J
2
6N
30
11F
58
5A
86
3K
3
7P
31
11G
59
4A
87
3J
4
7N
32
9F
60
5C
88
2K
5
7R
33
10F
61
4B
89
1K
6
8R
34
11E
62
3A
90
2L
7
8P
35
10E
63
2A
91
3L
8
9R
36
10D
64
1A
92
1M
9
11P
37
9E
65
2B
93
1L
10
10P
38
10C
66
3B
94
3N
11
10N
39
11D
67
1C
95
3M
12
9P
40
9C
68
1B
96
1N
13
10M
41
9D
69
3D
97
2M
14
11N
42
11B
70
3C
98
3P
15
9M
43
11C
71
1D
99
2N
16
9N
44
9B
72
2C
100
2P
17
11L
45
10B
73
3E
101
1P
18
11M
46
11A
74
2D
102
3R
19
9L
47
10A
75
2E
103
4R
20
10L
48
9A
76
1E
104
4P
21
11K
49
8B
77
2F
105
5P
22
10K
50
7C
78
3F
106
5N
23
9J
51
6C
79
1G
107
5R
24
9K
52
8A
80
1F
108
Internal
25
10J
53
7A
81
3G
26
11J
54
7B
82
2G
27
11H
55
6B
83
1H
Document Number: 001-70203 Rev. *F
Page 17 of 28
CY7C1568XV18/CY7C1570XV18
Power Up Sequence in DDR II+ Xtreme SRAM
PLL Constraints
DDR II+ Xtreme SRAMs must be powered up and initialized in a
predefined manner to prevent undefined operations.
■
PLL uses K clock as its synchronizing input. The input must
have low phase jitter, which is specified as tKC Var.
■
The PLL functions at frequencies down to 120 MHz.
■
If the input clock is unstable and the PLL is enabled, then the
PLL may lock onto an incorrect frequency, causing unstable
SRAM behavior. To avoid this, provide 100 s of stable clock
to relock to the desired clock frequency.
Power Up Sequence
■
Apply power and drive DOFF either HIGH or LOW (All other
inputs can be HIGH or LOW).
❐ Apply VDD before VDDQ.
❐ Apply VDDQ before VREF or at the same time as VREF.
❐ Drive DOFF HIGH.
■
Provide stable DOFF (HIGH), power and clock (K, K) for 100 s
to lock the PLL.
Figure 4. Power Up Waveforms
Document Number: 001-70203 Rev. *F
Page 18 of 28
CY7C1568XV18/CY7C1570XV18
Maximum Ratings
Operating Range
Exceeding maximum ratings may shorten the useful life of the
device. User guidelines are not tested.
Storage temperature ................................ –65 °C to +150 °C
Supply voltage on VDD relative to GND .......–0.5 V to +2.9 V
Range
Ambient
Temperature (TA)
Commercial
0 °C to +70 °C
VDD [19]
VDDQ [19]
1.8 ± 0.1 V 1.4 V to 1.6 V
Supply voltage on VDDQ relative to GND ...... –0.5 V to +VDD
DC applied to outputs in High Z ........–0.5 V to VDDQ + 0.3 V
DC input voltage [18] ........................... –0.5 V to VDD + 0.3 V
Neutron Soft Error Immunity
Current into outputs (LOW) ........................................ 20 mA
Static discharge voltage
(MIL-STD-883, M 3015) ........................................ > 2,001 V
Test
Parameter Description Conditions
Typ
Unit
LSBU
Logical
Single-Bit
Upsets
25 °C
260
271
FIT/
Mb
LMBU
Logical
Multi-Bit
Upsets
25 °C
0
0.01
FIT/
Mb
Single Event
Latch up
85 °C
0
0.1
FIT/
Dev
Latch up current .................................................... > 200 mA
Maximum Junction Temperature ................................125 °C
Max*
SEL
* No LMBU or SEL events occurred during testing; this column represents a
statistical 2, 95% confidence limit calculation. For more details refer to
Application Note AN54908 “Accelerated Neutron SER Testing and Calculation of
Terrestrial Failure Rates”.
Electrical Characteristics
Over the Operating Range
DC Electrical Characteristics
Over the Operating Range
Parameter [20]
Min
Typ
Max
Unit
VDD
Power supply voltage
Description
Test Conditions
1.7
1.8
1.9
V
VDDQ
I/O supply voltage
1.4
1.5
1.6
V
VOH
Output HIGH voltage
Note 21
VDDQ/2 – 0.12
–
VDDQ/2 + 0.12
V
VOL
Output LOW voltage
Note 22
VDDQ/2 – 0.12
–
VDDQ/2 + 0.12
V
VOH(LOW)
Output HIGH voltage
IOH =0.1 mA, Nominal impedance
VDDQ – 0.2
–
VDDQ
V
VOL(LOW)
Output LOW voltage
IOL = 0.1 mA, Nominal impedance
VSS
–
0.2
V
VIH
Input HIGH voltage
VREF + 0.1
–
VDDQ + 0.15
V
VIL
Input LOW voltage
–0.15
–
VREF – 0.1
V
IX
Input leakage current
GND  VI  VDDQ
2
–
2
A
IOZ
Output leakage current
GND  VI  VDDQ, Output disabled
2
–
2
A
VREF
Input reference voltage
Typical value = 0.75 V
0.68
0.75
0.86
V
Notes
18. Overshoot: VIH(AC) < VDDQ + 0.3 V (Pulse width less than tCYC/2), Undershoot: VIL(AC) > 0.3 V (Pulse width less than tCYC/2).
19. Power up: assumes a linear ramp from 0 V to VDD(min) within 200 ms. During this time VIH < VDD and VDDQ < VDD.
20. All Voltage referenced to Ground.
21. Outputs are impedance controlled. IOH = –(VDDQ/2)/(RQ/5) for values of 175  < RQ < 350 .
22. Outputs are impedance controlled. IOL = (VDDQ/2)/(RQ/5) for values of 175  < RQ < 350 .
Document Number: 001-70203 Rev. *F
Page 19 of 28
CY7C1568XV18/CY7C1570XV18
Electrical Characteristics (continued)
Over the Operating Range
DC Electrical Characteristics (continued)
Over the Operating Range
Parameter [20]
IDD
[23]
ISB1
Description
VDD operating supply
Automatic power down
current
Test Conditions
Min
Typ
Max
Unit
VDD = Max, IOUT = 0 mA, 633 MHz (× 18)
f = fMAX = 1/tCYC
(× 36)
–
–
965
mA
–
–
1230
600 MHz (× 18)
–
–
910
(× 36)
–
–
1165
633 MHz (× 18)
–
–
965
Max VDD,
Both ports deselected,
VIN  VIH or VIN  VIL,
f = fMAX = 1/tCYC,
Inputs Static
(× 36)
–
–
1230
600 MHz (× 18)
–
–
910
(× 36)
–
–
1165
mA
mA
mA
Note
23. The operation current is calculated with 50% read cycle and 50% write cycle.
Document Number: 001-70203 Rev. *F
Page 20 of 28
CY7C1568XV18/CY7C1570XV18
AC Electrical Characteristics
Over the Operating Range
Parameter [24]
Description
Test Conditions
Min
Typ
Max
Unit
VIH
Input HIGH voltage
VREF + 0.2
–
VDDQ + 0.24
V
VIL
Input LOW voltage
–0.24
–
VREF – 0.2
V
Max
Unit
4
pF
4
pF
Capacitance
Parameter [25]
Description
CIN
Input capacitance
CO
Output capacitance
Test Conditions
TA = 25 C, f = 1 MHz, VDD = 1.8 V, VDDQ = 1.5 V
Thermal Resistance
Parameter [25]
JA (0 m/s)
Description
Thermal resistance
(junction to ambient)
JA (1 m/s)
165-ball FBGA Unit
Package
Test Conditions
Socketed on a 170 × 220 × 2.35 mm, eight-layer printed
circuit board
JA (3 m/s)
14.43
°C/W
13.40
°C/W
12.66
°C/W
JB
Thermal resistance
(junction to board)
11.38
°C/W
JC
Thermal resistance
(junction to case)
3.30
°C/W
AC Test Loads and Waveforms
Figure 5. AC Test Loads and Waveforms
VREF = 0.75 V
VREF
0.75 V
VREF
OUTPUT
Z0 = 50 
Device
Under
Test
ZQ
RL = 50 
R = 50 
ALL INPUT PULSES
1.25 V
0.75 V
OUTPUT
Device
Under
VREF = 0.75 V Test ZQ
RQ =
250 
(a)
0.75 V
INCLUDING
JIG AND
SCOPE
5 pF
[26]
0.25 V
Slew Rate = 2 V/ns
RQ =
250 
(b)
Notes
24. Overshoot: VIH(AC) < VDDQ + 0.3 V (Pulse width less than tCYC/2), Undershoot: VIL(AC) > 0.3 V (Pulse width less than tCYC/2).
25. Tested initially and after any design or process change that may affect these parameters.
26. Unless otherwise noted, test conditions assume signal transition time of 2 V/ns, timing reference levels of 0.75 V, VREF = 0.75 V, RQ = 250 , VDDQ = 1.5 V, input
pulse levels of 0.25 V to 1.25 V, and output loading of the specified IOL/IOH and load capacitance shown in (a) of Figure 5.
Document Number: 001-70203 Rev. *F
Page 21 of 28
CY7C1568XV18/CY7C1570XV18
Switching Characteristics
Over the Operating Range
Parameter [27, 28]
633 MHz
Description
Cypress Consortium
Parameter Parameter
Min
VDD(typical) to the first access [29]
tPOWER
Max
600 MHz
Min
Max
Unit
1
–
1
–
ms
tCYC
tKHKH
K clock cycle time
1.58
8.4
1.66
8.4
ns
tKH
tKHKL
Input clock (K/K) HIGH
0.4
–
0.4
–
ns
tKL
tKLKH
Input clock (K/K) LOW
0.4
–
0.4
–
ns
tKHKH
tKHKH
K clock rise to K clock rise (rising edge to rising edge)
0.71
–
0.75
–
ns
Setup Times
tSA
tAVKH
Address setup to K clock rise
0.23
–
0.23
–
ns
tSC
tIVKH
Control setup to K clock rise (LD, R/W)
0.23
–
0.23
–
ns
tSCDDR
tIVKH
Double data rate control setup to clock (K/K) rise (BWS0, BWS1,
BWS2, BWS3)
0.18
–
0.18
–
ns
tSD
tDVKH
D[X:0] setup to clock (K/K) rise
0.18
–
0.18
–
ns
tHA
tKHAX
Address hold after K clock rise
0.23
–
0.23
–
ns
tHC
tKHIX
Control hold after K clock rise (LD, R/W)
0.23
–
0.23
–
ns
tHCDDR
tKHIX
Double data rate control hold after clock (K/K) rise (BWS0, BWS1,
BWS2, BWS3)
0.18
–
0.18
–
ns
tHD
tKHDX
D[X:0] hold after clock (K/K) rise
0.18
–
0.18
–
ns
Hold Times
Output Times
tCCQO
tCHCQV
K/K clock rise to echo clock valid
tCQOH
tCHCQX
Echo clock hold after K/K clock rise
tCQD
tCQHQV
Echo clock high to data valid
tCQDOH
tCQHQX
tCQH
tCQHCQL
tCQHCQH
tCQHCQH
–
0.45
–
0.45
ns
–0.45
–
–0.45
–
ns
–
0.09
–
0.09
ns
Echo clock high to data invalid
–0.09
–
–0.09
–
ns
Output clock (CQ/CQ) HIGH [30]
0.71
–
0.75
–
ns
0.71
–
0.75
–
ns
CQ clock rise to CQ clock rise (rising edge to rising edge)
tCHZ
tCHQZ
Clock (K/K) rise to high Z (active to high Z)
tCLZ
tCHQX1
Clock (K/K) rise to low Z [31, 32]
tQVLD
[33]
[31, 32]
[30]
–
0.45
–
0.45
ns
–0.45
–
–0.45
–
ns
–0.15
0.15
–0.15
0.15
ns
tCQHQVLD
Echo clock high to QVLD valid
tKC Var
tKC Var
Clock phase jitter
–
0.15
–
0.15
ns
tKC lock
tKC lock
PLL lock time (K)
100
–
100
–
s
tKC Reset
tKC Reset
K static to PLL reset [34]
30
–
30
–
ns
PLL Timing
Notes
27. Unless otherwise noted, test conditions assume signal transition time of 2 V/ns, timing reference levels of 0.75 V, VREF = 0.75 V, RQ = 250 , VDDQ = 1.5 V, input pulse
levels of 0.25 V to 1.25 V, and output loading of the specified IOL/IOH and load capacitance shown in (a) of Figure 5 on page 21.
28. When a part with a maximum frequency above 600 MHz is operating at a lower clock frequency, it requires the input timings of the frequency range in which it is being
operated and outputs data with the output timings of that frequency range.
29. This part has an internal voltage regulator; tPOWER is the time that the power is supplied above VDD min initially before a read or write operation can be initiated.
30. These parameters are extrapolated from the input timing parameters (tCYC/2 – 80 ps, where 80 ps is the internal jitter). These parameters are only guaranteed by design
and are not tested in production.
31. tCHZ, tCLZ are specified with a load capacitance of 5 pF as in (b) of Figure 5 on page 21. Transition is measured 100 mV from steady-state voltage.
32. At any voltage and temperature tCHZ is less than tCLZ.
33. tQVLD specification is applicable for both rising and falling edges of QVLD signal.
34. Hold to >VIH or <VIL.
Document Number: 001-70203 Rev. *F
Page 22 of 28
CY7C1568XV18/CY7C1570XV18
Switching Waveforms
Read/Write/Deselect Sequence
Figure 6. Waveform for 2.5 Cycle Read Latency [35, 36, 37]
NOP
1
READ
2
READ
3
NOP
5
NOP
4
WRITE
7
NOP
6
WRITE
8
READ
9
NOP
10
NOP
11
12
K
t KH
t KHKH
tCYC
t KL
K
LD
tSC t HC
R/W
A
A0
t SA t HA
A1
A2
t QVLD
t QVLD
A3
A4
t QVLD
QVLD
tHD
t HD
tSD
Q00
DQ
Q01 Q10 Q11
D20 D21
D30
D31
Q40
tCHZ
tCLZ
(Read Latency = 2.5 Cycles)
tSD
t CQ D
t CCQO
t CQDOH
t CQOH
CQ
t CQOH
t CCQO
tCQH
tCQHCQH
CQ
D O N’T CA RE
U N D EFIN ED
Notes
35. Q00 refers to output from address A0. Q01 refers to output from the next internal burst address following A0, that is, A0 + 1.
36. Outputs are disabled (High Z) one clock cycle after a NOP.
37. In this example, if address A4 = A3, then data Q40 = D30 and Q41 = D31. Write data is forwarded immediately as read results. This note applies to the whole diagram.
Document Number: 001-70203 Rev. *F
Page 23 of 28
CY7C1568XV18/CY7C1570XV18
Ordering Information
The following table contains only the parts that are currently available. If you do not see what you are looking for, contact your local
sales representative. For more information, visit the Cypress website at www.cypress.com and refer to the product summary page
at http://www.cypress.com/products
Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives and distributors. To find the office
closest to you, visit us at http://www.cypress.com/go/datasheet/offices.
Speed
(MHz)
633
Ordering Code
CY7C1568XV18-633BZXC
Package
Diagram
Part and Package Type
Operating
Range
51-85180 165-ball FBGA (13 × 15 × 1.4 mm) Pb-free
Commercial
51-85180 165-ball FBGA (13 × 15 × 1.4 mm) Pb-free
Commercial
CY7C1570XV18-633BZXC
600
CY7C1568XV18-600BZXC
Ordering Code Definitions
CY 7
C 15XX X V18 - XXX BZ
X
X
Temperature Range:
C = Commercial
Pb-free
Package Type:
BZ = 165-ball FBGA
Frequency Range: XXX = 633 MHz or 600 MHz
V18 = 1.8 V
Die Revision
Part Identifier: 15XX = 1568 or 1570
Technology Code: C = CMOS
Marketing Code: 7 = SRAM
Company ID: CY = Cypress
Document Number: 001-70203 Rev. *F
Page 24 of 28
CY7C1568XV18/CY7C1570XV18
Package Diagram
Figure 7. 165-ball FBGA (13 × 15 × 1.4 mm) BB165D/BW165D (0.5 Ball Diameter) Package Outline, 51-85180
51-85180 *G
Document Number: 001-70203 Rev. *F
Page 25 of 28
CY7C1568XV18/CY7C1570XV18
Acronyms
Acronym
Document Conventions
Description
Units of Measure
DDR
Double Data Rate
FBGA
Fine-Pitch Ball Grid Array
°C
degree Celsius
HSTL
High-Speed Transceiver Logic
k
kilohm
I/O
Input/Output
MHz
megahertz
JTAG
Joint Test Action Group
µA
microampere
LSB
Least Significant Bit
µs
microsecond
LMBU
Logical Multi-Bit Upsets
mA
milliampere
LSBU
Logical Single-Bit Upsets
mV
milli Volts
MSB
Most Significant Bit
mm
millimeter
PLL
Phase-Locked Loop
ms
millisecond
SEL
Single Event Latch-up
ns
nanosecond
SRAM
Static Random Access Memory
TAP
Test Access Port
pF
picofarad
TCK
Test Clock
ps
picosecond
TDI
Test Data-In
V
volt
TDO
Test Data-Out
W
watt
TMS
Test Mode Select
Document Number: 001-70203 Rev. *F
Symbol
Unit of Measure

ohm
%
percent
Page 26 of 28
CY7C1568XV18/CY7C1570XV18
Document History Page
Document Title: CY7C1568XV18/CY7C1570XV18, 72-Mbit DDR II+ Xtreme SRAM Two-Word Burst Architecture (2.5 Cycle
Read Latency)
Document Number: 001-70203
Rev.
ECN No.
Orig. of
Change
Submission
Date
Description of Change
**
3302894
OSN
07/05/2011
New data sheet.
*A
3532310
PRIT
02/22/2012
Changed status from Preliminary to Final.
*B
3639849
PRIT
06/08/2012
No technical updates.
Completing Sunset Review.
*C
3767747
PRIT
10/05/2012
Updated Application Example (Updated Figure 2).
Updated TAP Electrical Characteristics (Updated Note 13).
Updated TAP AC Switching Characteristics (Updated Note 16).
Updated TAP Timing and Test Conditions (Updated Note 17 and updated
Figure 3).
Updated Thermal Resistance (Changed value of JA parameter from
23.94 °C/W to 14.84 °C/W for 165-ball FBGA Package, changed value of JC
parameter from 3.0 °C/W to 5.1 °C/W for 165-ball FBGA Package).
Updated Package Diagram (spec 51-85180 (Changed revision from *E to *F)).
*D
4380995
PRIT
05/15/2014
Updated Application Example:
Updated Figure 2.
Updated Thermal Resistance:
Updated values of JA parameter.
Included JB parameter and its details.
Updated to new template.
Completing Sunset Review.
*E
4574060
PRIT
11/19/2014
Updated Functional Description:
Added “For a complete list of related documentation, click here.” at the end.
*F
5309409
PRIT
06/15/2016
Updated Ordering Information:
Updated part numbers.
Updated Package Diagram:
spec 51-85180 – Changed revision from *F to *G.
Updated to new template.
Completing Sunset Review.
Document Number: 001-70203 Rev. *F
Page 27 of 28
CY7C1568XV18/CY7C1570XV18
Sales, Solutions, and Legal Information
Worldwide Sales and Design Support
Cypress maintains a worldwide network of offices, solution centers, manufacturer’s representatives, and distributors. To find the office
closest to you, visit us at Cypress Locations.
PSoC®Solutions
Products
ARM® Cortex® Microcontrollers
Automotive
cypress.com/arm
cypress.com/automotive
Clocks & Buffers
Interface
Lighting & Power Control
Memory
cypress.com/clocks
cypress.com/interface
cypress.com/powerpsoc
cypress.com/memory
PSoC
Cypress Developer Community
Forums | Projects | Video | Blogs | Training | Components
Technical Support
cypress.com/support
cypress.com/psoc
Touch Sensing
cypress.com/touch
USB Controllers
Wireless/RF
PSoC 1 | PSoC 3 | PSoC 4 | PSoC 5LP
cypress.com/usb
cypress.com/wireless
© Cypress Semiconductor Corporation, 2011-2016. This document is the property of Cypress Semiconductor Corporation and its subsidiaries, including Spansion LLC ("Cypress"). This document,
including any software or firmware included or referenced in this document ("Software"), is owned by Cypress under the intellectual property laws and treaties of the United States and other countries
worldwide. Cypress reserves all rights under such laws and treaties and does not, except as specifically stated in this paragraph, grant any license under its patents, copyrights, trademarks, or other
intellectual property rights. If the Software is not accompanied by a license agreement and you do not otherwise have a written agreement with Cypress governing the use of the Software, then Cypress
hereby grants you a personal, non-exclusive, nontransferable license (without the right to sublicense) (1) under its copyright rights in the Software (a) for Software provided in source code form, to
modify and reproduce the Software solely for use with Cypress hardware products, only internally within your organization, and (b) to distribute the Software in binary code form externally to end users
(either directly or indirectly through resellers and distributors), solely for use on Cypress hardware product units, and (2) under those claims of Cypress's patents that are infringed by the Software (as
provided by Cypress, unmodified) to make, use, distribute, and import the Software solely for use with Cypress hardware products. Any other use, reproduction, modification, translation, or compilation
of the Software is prohibited.
TO THE EXTENT PERMITTED BY APPLICABLE LAW, CYPRESS MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS DOCUMENT OR ANY SOFTWARE
OR ACCOMPANYING HARDWARE, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. To the extent
permitted by applicable law, Cypress reserves the right to make changes to this document without further notice. Cypress does not assume any liability arising out of the application or use of any
product or circuit described in this document. Any information provided in this document, including any sample design information or programming code, is provided only for reference purposes. It is
the responsibility of the user of this document to properly design, program, and test the functionality and safety of any application made of this information and any resulting product. Cypress products
are not designed, intended, or authorized for use as critical components in systems designed or intended for the operation of weapons, weapons systems, nuclear installations, life-support devices or
systems, other medical devices or systems (including resuscitation equipment and surgical implants), pollution control or hazardous substances management, or other uses where the failure of the
device or system could cause personal injury, death, or property damage ("Unintended Uses"). A critical component is any component of a device or system whose failure to perform can be reasonably
expected to cause the failure of the device or system, or to affect its safety or effectiveness. Cypress is not liable, in whole or in part, and you shall and hereby do release Cypress from any claim,
damage, or other liability arising from or related to all Unintended Uses of Cypress products. You shall indemnify and hold Cypress harmless from and against all claims, costs, damages, and other
liabilities, including claims for personal injury or death, arising from or related to any Unintended Uses of Cypress products.
Cypress, the Cypress logo, Spansion, the Spansion logo, and combinations thereof, PSoC, CapSense, EZ-USB, F-RAM, and Traveo are trademarks or registered trademarks of Cypress in the United
States and other countries. For a more complete list of Cypress trademarks, visit cypress.com. Other names and brands may be claimed as property of their respective owners.
Document Number: 001-70203 Rev. *F
Revised June 15, 2016
Page 28 of 28