CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
72-Mbit DDR-II SRAM 2-Word
Burst Architecture
Features
Functional Description
■ 72-Mbit density (8M x 8, 8M x 9, 4M x 18, 2M x 36)
■ 300 MHz clock for high bandwidth
The CY7C1516JV18, CY7C1527JV18, CY7C1518JV18, and
CY7C1520JV18 are 1.8V Synchronous Pipelined SRAM
equipped with DDR-II architecture. The DDR-II consists of an
SRAM core with advanced synchronous peripheral circuitry and
a 1-bit burst counter. 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 C and C if provided, or on the rising
edge of K and K if C/C are not provided. Each address location
is associated with two 8-bit words in the case of CY7C1516JV18
and two 9-bit words in the case of CY7C1527JV18 that burst
sequentially into or out of the device. The burst counter always
starts with a “0” internally in the case of CY7C1516JV18 and
CY7C1527JV18. On CY7C1518JV18 and CY7C1520JV18, the
burst counter takes in the least significant bit of the external
address and bursts two 18-bit words in the case of
CY7C1518JV18 and two 36-bit words in the case of
CY7C1520JV18 sequentially into or out of the device.
■ 2-word burst for reducing address bus frequency
■ Double Data Rate (DDR) interfaces
(data transferred at 600 MHz) at 300 MHz
■ Two input clocks (K and K) for precise DDR timing
❐ SRAM uses rising edges only
■ Two input clocks for output data (C and C) to minimize clock
skew and flight time mismatches
■ Echo clocks (CQ and CQ) simplify data capture in high speed
systems
■ Synchronous internally self-timed writes
■ DDR-II operates with 1.5 cycle read latency when Delay Lock
Loop (DLL) is enabled
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. Output data clocks (C/C) enable maximum system
clocking and data synchronization flexibility.
■ Operates similar to a DDR-I device with 1 cycle read latency in
DLL off mode
■ 1.8V core power supply with HSTL inputs and outputs
■ Variable drive HSTL output buffers
■ Expanded HSTL output voltage (1.4V–V
)
DD
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 C or C (or K or K in a single clock
domain) input clocks. Writes are conducted with on-chip
synchronous self-timed write circuitry.
■ Available in 165-ball FBGA package (15 x 17 x 1.4 mm)
■ Offered in both Pb-free and non Pb-free packages
■ JTAG 1149.1 compatible test access port
■ Delay Lock Loop (DLL) for accurate data placement
Configurations
CY7C1516JV18 – 8M x 8
CY7C1527JV18 – 8M x 9
CY7C1518JV18 – 4M x 18
CY7C1520JV18 – 2M x 36
Selection Guide
Description
Maximum Operating Frequency
Maximum Operating Current
300 MHz
300
250 MHz
250
Unit
MHz
mA
x8
x9
1035
1035
1045
1055
800
800
x18
x36
800
900
Cypress Semiconductor Corporation
Document Number: 001-12559 Rev. *D
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised June 25, 2008
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Logic Block Diagram (CY7C1518JV18)
Burst
Logic
A0
Write
Reg
Write
Reg
22 21
A
A
(21:0)
Address
Register
(21:1)
18
LD
K
K
Output
R/W
CLK
Logic
Gen.
Control
C
C
DOFF
Read Data Reg.
36
18
CQ
CQ
V
REF
18
18
Reg.
Reg.
Reg.
Control
Logic
R/W
18
18
BWS
DQ
[1:0]
[17:0]
Logic Block Diagram (CY7C1520JV18)
Burst
Logic
A0
Write
Reg
Write
Reg
21 20
A
A
(20:0)
Address
Register
(20:1)
36
LD
K
K
Output
Logic
Control
CLK
R/W
Gen.
C
C
DOFF
Read Data Reg.
72
36
CQ
CQ
V
REF
36
36
Reg.
Reg.
Reg.
Control
Logic
R/W
36
36
BWS
DQ
[3:0]
[35:0]
Document Number: 001-12559 Rev. *D
Page 3 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Pin Configuration
The pin configuration for CY7C1516JV18, CY7C1527JV18, CY7C1518JV18, and CY7C1520JV18 follow.
165-Ball FBGA (15 x 17 x 1.4 mm) Pinout
CY7C1516JV18 (8M x 8)
1
CQ
NC
NC
NC
NC
NC
NC
DOFF
NC
NC
NC
NC
NC
NC
TDO
2
3
4
R/W
A
5
6
K
K
A
7
8
LD
A
9
10
A
11
CQ
DQ3
NC
NC
DQ2
NC
NC
ZQ
A
B
C
D
E
F
A
A
NWS
NC/144M
A
1
NC
NC
NC
NC
NC
NC
NC
NC
NC
DQ4
NC
DQ5
NC/288M
A
NWS
A
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
0
V
V
V
SS
SS
SS
SS
V
V
V
V
V
V
SS
SS
DD
DD
DD
DD
DD
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
DD
DD
DD
DD
DD
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
V
V
V
V
V
V
V
V
V
V
G
H
J
V
V
V
V
REF
REF
DDQ
DDQ
NC
NC
NC
DQ1
NC
NC
DQ0
NC
NC
NC
TDI
K
L
NC
DQ6
NC
NC
NC
NC
NC
DQ7
A
NC
NC
NC
NC
NC
A
NC
NC
V
V
V
V
SS
SS
SS
SS
M
N
P
R
V
V
NC
SS
SS
SS
NC
V
A
A
A
A
C
C
A
A
A
V
NC
SS
NC
A
A
A
A
NC
TCK
TMS
CY7C1527JV18 (8M x 9)
1
CQ
NC
NC
NC
NC
NC
NC
DOFF
NC
NC
NC
NC
NC
NC
TDO
2
3
4
5
NC
6
K
K
A
7
8
9
10
A
11
CQ
DQ3
NC
A
B
C
D
E
F
A
A
R/W
A
NC/144M
LD
A
A
NC
NC
NC
NC
NC
NC
NC
NC
NC
DQ4
NC
DQ5
NC/288M
A
BWS
A
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
0
V
V
V
SS
SS
SS
SS
V
V
V
V
V
V
NC
SS
SS
DD
DD
DD
DD
DD
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
DD
DD
DD
DD
DD
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DQ2
NC
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
V
V
V
V
V
V
V
V
V
V
G
H
J
NC
V
V
V
V
REF
ZQ
REF
DDQ
DDQ
NC
NC
NC
NC
DQ1
NC
NC
K
L
NC
NC
NC
NC
DQ7
A
NC
NC
NC
NC
NC
A
NC
DQ6
NC
V
V
NC
DQ0
NC
SS
SS
SS
SS
M
N
P
R
V
V
V
V
NC
SS
SS
SS
NC
V
A
A
A
A
C
C
A
A
A
V
NC
NC
SS
NC
A
A
A
A
NC
DQ8
TDI
TCK
TMS
Note
1. NC/144M and NC/288M are not connected to the die and can be tied to any voltage level.
Document Number: 001-12559 Rev. *D
Page 4 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Pin Configuration
[1]
The pin configuration for CY7C1516JV18, CY7C1527JV18, CY7C1518JV18, and CY7C1520JV18 follow.
(continued)
165-Ball FBGA (15 x 17 x 1.4 mm) Pinout
CY7C1518JV18 (4M x 18)
1
CQ
NC
NC
NC
NC
NC
NC
DOFF
NC
NC
NC
NC
NC
NC
TDO
2
A
3
4
R/W
A
5
6
K
7
8
LD
A
9
10
A
11
CQ
A
B
C
D
E
F
A
BWS
NC/144M
A
1
DQ9
NC
NC
NC
DQ12
NC
NC
NC/288M
A
K
BWS
A
NC
NC
NC
NC
NC
NC
NC
DQ7
NC
NC
NC
NC
DQ8
NC
0
NC
V
V
A0
V
SS
SS
SS
SS
DQ10
DQ11
NC
V
V
V
V
V
V
NC
SS
SS
DD
DD
DD
DD
DD
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
DD
DD
DD
DD
DD
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DQ6
DQ5
NC
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
V
V
V
V
V
V
V
V
V
V
G
H
J
DQ13
V
V
V
V
REF
ZQ
REF
DDQ
DDQ
NC
NC
NC
DQ14
NC
NC
DQ4
D3
NC
K
L
NC
NC
NC
NC
NC
A
DQ3
DQ2
NC
DQ15
NC
V
V
V
V
NC
SS
SS
SS
SS
M
N
P
R
NC
V
V
DQ1
NC
SS
SS
SS
NC
DQ16
DQ17
A
V
A
A
A
A
C
C
A
A
A
V
NC
SS
NC
A
A
A
A
NC
DQ0
TDI
TCK
TMS
CY7C1520JV18 (2M x 36)
1
CQ
NC
NC
NC
NC
NC
NC
DOFF
NC
NC
NC
NC
NC
NC
TDO
2
NC/144M
DQ27
NC
3
4
5
BWS
BWS
A
6
K
7
BWS
BWS
A
8
9
10
A
11
A
B
C
D
E
F
A
R/W
A
LD
A
A
CQ
2
3
1
0
DQ18
DQ28
DQ19
DQ20
DQ21
DQ22
K
NC
NC
NC
NC
NC
NC
NC
DQ8
DQ7
DQ16
DQ6
DQ5
DQ14
ZQ
V
V
A0
V
DQ17
NC
SS
SS
SS
SS
DQ29
NC
V
V
V
V
V
V
SS
SS
DD
DD
DD
DD
DD
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
DD
DD
DD
DD
DD
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DQ15
NC
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DDQ
DQ30
DQ31
V
V
V
V
V
V
V
V
V
V
G
H
J
NC
V
V
V
V
REF
REF
DDQ
DDQ
NC
NC
DQ32
DQ23
DQ24
DQ34
DQ25
DQ26
A
NC
DQ13
DQ12
NC
DQ4
DQ3
DQ2
DQ1
DQ10
DQ0
TDI
K
L
NC
NC
NC
NC
NC
A
DQ33
NC
V
V
SS
SS
SS
SS
M
N
P
R
V
V
V
V
DQ11
NC
SS
SS
SS
DQ35
NC
V
A
A
A
A
C
C
A
A
A
V
SS
A
A
A
A
DQ9
TMS
TCK
Document Number: 001-12559 Rev. *D
Page 5 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Pin Definitions
Pin Name
DQ
IO
Pin Description
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 C and C clocks during read operations or K and K when in single clock
[x:0]
mode. When read access is deselected, Q
are automatically tri-stated.
[x:0]
CY7C1516JV18 − DQ
[7:0]
CY7C1527JV18 − DQ
[8:0]
CY7C1518JV18 − DQ
[17:0]
CY7C1520JV18 − DQ
[35:0]
LD
NWS ,
Input-
Synchronous Load. This input is brought LOW when a bus cycle sequence is defined. This definition
Synchronous includes address and read/write direction. All transactions operate on a burst of 2 data.
Input-
Nibble Write Select 0, 1 − Active LOW (CY7C1516JV18 only). Sampled on the rising edge of the K
0
Synchronous and K clocks during Write operations. Used to select which nibble is written into the device during the
current portion of the Write operations. Nibbles not written remain unaltered.
NWS
1
NWS controls D
and NWS controls D
.
0
[3:0]
1
[7:4]
All the Nibble Write Selects are sampled on the same edge as the data. Deselecting a Nibble Write Select
ignores the corresponding nibble of data and it is not written into the device.
BWS ,
Input-
Byte Write Select 0, 1, 2, and 3 − Active LOW. Sampled on the rising edge of the K and K clocks during
0
BWS ,
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.
1
BWS ,
2
BWS
CY7C1527JV18 − BWS controls D
3
0
[8:0]
[8:0]
CY7C1518JV18 − BWS controls D
and BWS controls D
[17:9].
0
1
CY7C1520JV18 − BWS controls D
[35:27]
, BWS controls D
, BWS controls D
and BWS controls
0
[8:0]
1
[17:9]
2
[26:18]
3
D
.
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, A0
Input-
Address Inputs. These address inputs are multiplexed for both read and write operations. Internally, the
Synchronous device is organized as 8M x 8 (2 arrays each of 4M x 8) for CY7C1516JV18 and 8M x 9 (2 arrays each
of 4M x9) for CY7C1527JV18, 4M x 18 (2 arrays each of 2M x 18) for CY7C1518JV18, and 2M x 36 (2
arrays each of 1M x 36) for CY7C1520JV18.
CY7C1516JV18 – Since the least significant bit of the address internally is a “0,” only 22 external address
inputs are needed to access the entire memory array.
CY7C1527JV18 – Since the least significant bit of the address internally is a “0,” only 22 external address
inputs are needed to access the entire memory array.
CY7C1518JV18 – A0 is the input to the burst counter. These are incremented in a linear fashion internally.
22 address inputs are needed to access the entire memory array.
CY7C1520JV18 – A0 is the input to the burst counter. These are incremented in a linear fashion internally.
21 address inputs are needed to access the entire memory array. All the address inputs are ignored when
the appropriate port is deselected.
R/W
C
Input-
Synchronous 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.
Input Clock Positive Input Clock for Output Data. C is used in conjunction with C to clock out the read data from
the device. C and C can be used together to deskew the flight times of various devices on the board back
to the controller. See application example for further details.
C
Input Clock Negative Input Clock for Output Data. C is used in conjunction with C to clock out the read data from
the device. C and C can be used together to deskew the flight times of various devices on the board back
to the controller. See application example for further details.
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
edge of K.
when in single clock mode. All accesses are initiated on the rising
[x:0]
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 when in single clock mode.
K
[x:0]
Document Number: 001-12559 Rev. *D
Page 6 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Pin Definitions (continued)
Pin Name
IO
Pin Description
CQ
Output Clock CQ is Referenced with Respect to C. This is a free running clock and is synchronized to the input clock
for output data (C) of the DDR-II. In the single clock mode, CQ is generated with respect to K. The timing
for the echo clocks is shown in the AC Timing table.
Output Clock CQ is Referenced with Respect to C. This is a free running clock and is synchronized to the input clock
for output data (C) of the DDR-II. In the single clock mode, CQ is generated with respect to K. The timing
for the echo clocks is shown in the AC Timing table.
CQ
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 output impedance are set to 0.2 x RQ, where RQ is a resistor connected
[x:0]
between ZQ and ground. Alternatively, this pin can be connected directly to V
, which enables the
DDQ
minimum impedance mode. This pin cannot be connected directly to GND or left unconnected.
DOFF
Input
DLL Turn Off − Active LOW. Connecting this pin to ground turns off the DLL inside the device. The timing
in the DLL 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 KΩ or less pull up resistor. The device behaves in DDR-I
mode when the DLL 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
Input
Input
Input
N/A
TDO for JTAG.
TCK
TCK Pin for JTAG.
TDI
TDI Pin for JTAG.
TMS
TMS Pin for JTAG.
NC
Not Connected to the Die. Can be tied to any voltage level.
Not Connected to the Die. Can be tied to any voltage level.
Not Connected to the Die. Can be tied to any voltage level.
Reference Voltage Input. Static input used to set the reference level for HSTL inputs, outputs, and AC
NC/144M
NC/288M
Input
Input
Input-
V
REF
Reference measurement points.
V
V
V
Power Supply Power Supply Inputs to the Core of the Device.
DD
Ground
Ground for the Device.
SS
Power Supply Power Supply Inputs for the Outputs of the Device.
DDQ
Document Number: 001-12559 Rev. *D
Page 7 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
presented to the burst counter. The burst counter increments the
address in a linear fashion. On the following K clock rise, the data
Functional Overview
The CY7C1516JV18, CY7C1527JV18, CY7C1518JV18, and
CY7C1520JV18 are synchronous pipelined Burst SRAMs
equipped with a DDR interface, which operates with a read
latency of one and a half cycles when DOFF pin is tied HIGH.
presented to D
is latched and stored into the 18-bit write
[17:0]
data register, provided BWS
are both asserted active. On the
[1:0]
subsequent rising edge of the Negative Input Clock (K) the infor-
mation presented to D
register, provided BWS
is also stored into the write data
are both asserted active. The 36 bits
[17:0]
When DOFF pin is set LOW or connected to V the device
SS
[1:0]
behaves in DDR-I mode with a read latency of one clock cycle.
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).
Accesses are initiated on the rising edge of the positive input
clock (K). All synchronous input timing is referenced from the
rising edge of the input clocks (K and K) and all output timing is
referenced to the rising edge of the output clocks (C/C, or K/K
when in single clock mode).
When the write access is deselected, the device ignores all
inputs after the pending write operations have been completed.
All synchronous data inputs (D
) pass through input registers
[x:0]
controlled by the rising edge of the input clocks (K and K). All
synchronous data outputs (Q ) pass through output registers
controlled by the rising edge of the output clocks (C/C, or K/K
when in single clock mode).
Byte Write Operations
[x:0]
Byte write operations are supported by the CY7C1518JV18. A
write operation is initiated as described in the Write Operations
section. The bytes that are written are determined by BWS and
0
All synchronous control (R/W, LD, BWS
) inputs pass through
[0:X]
BWS , which are sampled with each set of 18-bit data words.
1
input registers controlled by the rising edge of the input clock (K).
Asserting the 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.
CY7C1518JV18 is described in the following sections. The same
basic descriptions apply to CY7C1516JV18, CY7C1527JV18,
and CY7C1520JV18.
Read Operations
The CY7C1518JV18 is organized internally as a single array of
4M x 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 address inputs is stored in the
read address register and the least significant bit of the address
is presented to the burst counter. The burst counter increments
the address in a linear fashion. Following the next K clock rise,
the corresponding 18-bit word of data from this address location
Single Clock Mode
The CY7C1518JV18 can be used with a single clock that
controls both the input and output registers. In this mode, the
device recognizes only a single pair of input clocks (K and K) that
control both the input and output registers. This operation is
identical to the operation if the device had zero skew between
the K/K and C/C clocks. All timing parameters remain the same
in this mode. To use this mode of operation, the user must tie C
and C HIGH at power on. This function is a strap option and not
alterable during device operation.
is driven onto the Q
using C as the output timing reference.
[17:0]
On the subsequent rising edge of C the next 18-bit data word
from the address location generated by the burst counter is
DDR Operation
driven onto the Q
. The requested data is valid 0.45 ns from
[17:0]
the rising edge of the output clock (C or C, or K and K when in
single clock mode, 200 MHz, 250 MHz, and 300 MHz device). 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).
The CY7C1518JV18 enables high-performance operation
through high clock frequencies (achieved through pipelining) and
DDR mode of operation. The CY7C1518JV18 requires a single
No Operation (NOP) cycle during transition from a read to a write
cycle. At higher frequencies, some applications may require a
second NOP cycle to avoid contention.
When read access is deselected, the CY7C1518JV18 first
completes the pending read transactions. Synchronous internal
circuitry automatically tri-states the output following the next
rising edge of the positive output clock (C). This enables for a
transition between devices without the insertion of wait states in
a depth expanded memory.
If a read occurs after a write cycle, address and data for the write
are stored in registers. The write information must be 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.
Write Operations
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 and the least significant bit of the address is
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.
Document Number: 001-12559 Rev. *D
Page 8 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Depth Expansion
DDR-II. CQ is referenced with respect to C and CQ is referenced
with respect to C. These are free-running clocks and are
synchronized to the output clock of the DDR-II. In single clock
mode, CQ is generated with respect to K and CQ is generated
with respect to K. The timing for the echo clocks is shown in the
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
DLL
on the SRAM and V to allow the SRAM to adjust its output
SS
These chips utilize a DLL that is designed to function between
120 MHz and the specified maximum clock frequency. During
power up, when the DOFF is tied HIGH, the DLL is locked after
1024 cycles of stable clock. The DLL 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 DLL to lock to the
desired frequency. The DLL automatically locks 1024 clock
cycles after a stable clock is presented. The DLL may be
disabled by applying ground to the DOFF pin. When the DLL 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 DLL Considerations in QDRII™/DDRII.
driver impedance. The value of RQ must be 5x 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 175Ω and 350Ω, with V
= 1.5V. The
DDQ
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
Application Example
Figure 1 shows two DDR-II used in an application.
Figure 1. Application Example
R = 250ohms
R = 250ohms
SRAM#2
SRAM#1
ZQ
ZQ
DQ
A
DQ
A
CQ/CQ#
LD# R/W# C C# K K#
CQ/CQ#
LD# R/W# C C#
K
K#
DQ
Addresses
Cycle Start#
R/W#
Return CLK
Source CLK
Return CLK#
Source CLK#
BUS
MASTER
(CPU
or
Vterm = 0.75V
R = 50ohms
Vterm = 0.75V
ASIC)
Echo Clock1/Echo Clock#1
Echo Clock2/Echo Clock#2
Document Number: 001-12559 Rev. *D
Page 9 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Truth Table
The truth table for the CY7C1516JV18, CY7C1527JV18, CY7C1518JV18, and CY7C1520JV18 follows.
Operation
K
LD
R/W
DQ
DQ
Write Cycle:
Load address; wait one cycle;
L-H
L
L
D(A1) at K(t + 1) ↑ D(A2) at K(t + 1) ↑
input write data on consecutive K and K rising edges.
Read Cycle:
Load address; wait one and a half cycle;
L-H
L
H
Q(A1) at C(t + 1)↑ Q(A2) at C(t + 2) ↑
read data on consecutive C and C rising edges.
NOP: No Operation
L-H
H
X
X
X
High-Z
High-Z
Standby: Clock Stopped
Stopped
Previous State
Previous State
Burst Address Table
(CY7C1518JV18, CY7C1520JV18)
First Address (External)
Second Address (Internal)
X..X0
X..X1
X..X1
X..X0
Write Cycle Descriptions
The write cycle description table for CY7C1516JV18 and CY7C1518JV18 follows.
BWS / BWS /
0
1
K
Comments
K
NWS
NWS
1
0
L
L
L–H
–
During the data portion of a write sequence:
CY7C1516JV18 − both nibbles (D
) are written into the device.
[7:0]
CY7C1518JV18 − both bytes (D
) are written into the device.
[17:0]
L
L
–
L–H
–
L-H During the data portion of a write sequence:
CY7C1516JV18 − both nibbles (D
) are written into the device.
[7:0]
CY7C1518JV18 − both bytes (D
) are written into the device.
[17:0]
L
H
H
L
–
During the data portion of a write sequence:
CY7C1516JV18 − only the lower nibble (D
) is written into the device, D
) is written into the device, D
remains unaltered.
remains unaltered.
[17:9]
[3:0]
[7:4]
CY7C1518JV18 − only the lower byte (D
[8:0]
L
L–H During the data portion of a write sequence:
CY7C1516JV18 − only the lower nibble (D
) is written into the device, D
) is written into the device, D
remains unaltered.
remains unaltered.
[3:0]
[7:4]
CY7C1518JV18 − only the lower byte (D
[8:0]
[17:9]
H
H
L–H
–
–
During the data portion of a write sequence:
CY7C1516JV18 − only the upper nibble (D
) is written into the device, D
) is written into the device, D
remains unaltered.
[3:0]
[7:4]
CY7C1518JV18 − only the upper byte (D
remains unaltered.
[17:9]
[8:0]
L
L–H During the data portion of a write sequence:
CY7C1516JV18 − only the upper nibble (D
) is written into the device, D
) is written into the device, D
remains unaltered.
remains unaltered.
[7:4]
[3:0]
[8:0]
CY7C1518JV18 − only the upper byte (D
[17:9]
H
H
H
H
L–H
–
–
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 tri-state condition.
4. On CY7C1518JV18 and CY7C1520JV18, “A1” represents address location latched by the devices when transaction was initiated and “A2” represents the addresses
sequence in the burst. On CY7C1516JV18 and CY7C1527JV18, “A1” represents A + ‘0’ and “A2” represents A + ‘1’.
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 C and C rising edges, except when in single clock mode.
7. It is recommended that K = K and C = C = HIGH when clock is stopped. 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 Write Cycle Descriptions table. NWS , NWS , BWS , BWS , BWS , and BWS can be altered on
0
1
0
1
2
3
different portions of a write cycle, as long as the setup and hold requirements are achieved.
Document Number: 001-12559 Rev. *D
Page 10 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Write Cycle Descriptions
The write cycle description table for CY7C1527JV18 follows.
BWS
K
L–H
–
K
Comments
0
L
L
–
During the data portion of a write sequence, the single byte (D
) is written into the device.
) is written into the device.
[8:0]
L–H During the data portion of a write sequence, the single byte (D
[8:0]
H
H
L–H
–
–
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.
Write Cycle Descriptions
The write cycle description table for CY7C1520JV18 follows.
BWS
BWS
BWS
BWS
3
K
K
Comments
0
1
2
L
L
L
L
L–H
–
During the data portion of a write sequence, all four bytes (D
the device.
) are written into
) are written into
[35:0]
L
L
L
H
H
L
L
H
H
H
H
L
L
H
H
H
H
H
H
L
–
L–H
–
L–H During the data portion of a write sequence, all four bytes (D
the device.
[35:0]
–
During the data portion of a write sequence, only the lower byte (D
) is written
) is written
[8:0]
[8:0]
into the device. D
remains unaltered.
[35:9]
L
L–H During the data portion of a write sequence, only the lower byte (D
into the device. D remains unaltered.
[35:9]
H
H
H
H
H
H
L–H
–
–
During the data portion of a write sequence, only the byte (D
) is written into
[17:9]
the device. D
and D
remains unaltered.
[8:0]
[35:18]
L
L–H During the data portion of a write sequence, only the byte (D
the device. D and D remains unaltered.
) is written into
[17:9]
[8:0]
[35:18]
H
H
H
H
L–H
–
–
During the data portion of a write sequence, only the byte (D
) is written into
) is written into
) is written into
) is written into
[26:18]
[26:18]
[35:27]
[35:27]
the device. D
and D
remains unaltered.
[17:0]
[35:27]
L
L–H During the data portion of a write sequence, only the byte (D
the device. D and D remains unaltered.
[17:0]
[35:27]
H
H
L–H
–
–
During the data portion of a write sequence, only the byte (D
the device. D remains unaltered.
[26:0]
L
L–H During the data portion of a write sequence, only the byte (D
the device. D remains unaltered.
[26:0]
H
H
H
H
H
H
H
H
L–H
–
–
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.
Document Number: 001-12559 Rev. *D
Page 11 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Instruction Register
IEEE 1149.1 Serial Boundary Scan (JTAG)
Three-bit instructions can be serially loaded into the instruction
register. This register is loaded when it is placed between the TDI
page 15. 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.
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 1.8V IO 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
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.
(V ) to prevent clocking of the device. TDI and TMS are inter-
SS
nally pulled up and may be unconnected. They may alternatively
be connected to V 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.
Bypass Register
DD
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 (V ) when
the BYPASS instruction is executed.
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.
SS
Boundary Scan Register
Test Mode Select (TMS)
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 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 inter-
nally, resulting in a logic HIGH level.
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.
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 on
loading the instruction register, see the TAP Controller State
unconnected if the TAP is unused in an application. TDI is
connected to the most significant bit (MSB) on any register.
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
Test Data-Out (TDO)
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
The TDO output pin is used to serially clock data out from the
registers. The output is active, depending upon the current state
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 (V ) for five rising
TAP Instruction Set
DD
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.
Eight different instructions are possible with the three-bit
instruction register. All combinations are listed in Instruction
RESERVED and must not be used. The other five instructions
are described in this section in detail.
TAP Registers
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.
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: 001-12559 Rev. *D
Page 12 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
IDCODE
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 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
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.
power up or whenever the TAP controller is given
Test-Logic-Reset state.
a
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.
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 given during the
Update IR state.
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.
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.
EXTEST OUTPUT BUS TRI-STATE
IEEE Standard 1149.1 mandates that the TAP controller be able
to put the output bus into a tri-state 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 tri-state,” 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 (t and t ). 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.
CS
CH
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
These instructions are not implemented but are reserved for
future use. Do not use these instructions.
Document Number: 001-12559 Rev. *D
Page 13 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
TAP Controller State Diagram
The state diagram for the TAP controller follows.
[9]
TEST-LOGIC
1
RESET
0
1
1
1
SELECT
TEST-LOGIC/
SELECT
0
IR-SCAN
IDLE
DR-SCAN
0
0
1
1
CAPTURE-DR
0
CAPTURE-IR
0
0
1
0
1
SHIFT-DR
1
SHIFT-IR
1
EXIT1-DR
0
EXIT1-IR
0
0
0
PAUSE-DR
1
PAUSE-IR
1
0
0
EXIT2-DR
1
EXIT2-IR
1
UPDATE-IR
0
UPDATE-DR
1
1
0
Note
9. The 0/1 next to each state represents the value at TMS at the rising edge of TCK.
Document Number: 001-12559 Rev. *D
Page 14 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
TAP Controller Block Diagram
0
Bypass Register
2
1
1
1
0
0
0
Selection
TDI
Selection
Circuitry
TDO
Instruction Register
Circuitry
31 30
29
.
.
2
Identification Register
.
108
.
.
.
2
Boundary Scan Register
TCK
TMS
TAP Controller
TAP Electrical Characteristics
Over the Operating Range
Parameter
Description
Output HIGH Voltage
Test Conditions
= −2.0 mA
Min
1.4
1.6
Max
Unit
V
V
V
V
V
V
I
I
I
I
I
V
V
OH1
OH2
OL1
OL2
IH
OH
OH
OL
OL
Output HIGH Voltage
Output LOW Voltage
Output LOW Voltage
Input HIGH Voltage
= −100 μA
= 2.0 mA
0.4
0.2
V
= 100 μA
V
0.65V
V
+ 0.3
V
DD
DD
Input LOW Voltage
–0.3
–5
0.35V
5
V
IL
DD
Input and Output Load Current
GND ≤ V ≤ V
DD
μA
X
I
Notes
10. These characteristics pertain to the TAP inputs (TMS, TCK, TDI and TDO). Parallel load levels are specified in the Electrical Characteristics Table.
11. Overshoot: V (AC) < V + 0.85V (Pulse width less than t /2).
/2), Undershoot: V (AC) > −1.5V (Pulse width less than t
IH
DDQ
CYC
IL
CYC
12. All Voltage referenced to Ground.
Document Number: 001-12559 Rev. *D
Page 15 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
TAP AC Switching Characteristics
Over the Operating Range
Parameter
Description
Min
Max
Unit
ns
t
t
t
t
TCK Clock Cycle Time
TCK Clock Frequency
TCK Clock HIGH
50
TCYC
TF
20
MHz
ns
20
20
TH
TCK Clock LOW
ns
TL
Setup Times
t
t
t
TMS Setup to TCK Clock Rise
TDI Setup to TCK Clock Rise
Capture Setup to TCK Rise
5
5
5
ns
ns
ns
TMSS
TDIS
CS
Hold Times
t
t
t
TMS Hold after TCK Clock Rise
TDI Hold after Clock Rise
5
5
5
ns
ns
ns
TMSH
TDIH
CH
Capture Hold after Clock Rise
Output Times
t
t
TCK Clock LOW to TDO Valid
TCK Clock LOW to TDO Invalid
10
ns
ns
TDOV
TDOX
0
TAP Timing and Test Conditions
Figure 2 shows the TAP timing and test conditions.
Figure 2. TAP Timing and Test Conditions
0.9V
ALL INPUT PULSES
1.8V
50Ω
0.9V
TDO
0V
Z = 50
Ω
0
C = 20 pF
L
t
t
TH
TL
GND
(a)
Test Clock
TCK
t
TCYC
t
TMSH
t
TMSS
Test Mode Select
TMS
t
TDIS
t
TDIH
Test Data In
TDI
Test Data Out
TDO
t
TDOV
t
TDOX
Notes
13. t and t refer to the setup and hold time requirements of latching data from the boundary scan register.
CS
CH
14. Test conditions are specified using the load in TAP AC Test Conditions. t /t = 1 ns.
R
F
Document Number: 001-12559 Rev. *D
Page 16 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Identification Register Definitions
Value
Instruction Field
Description
CY7C1516JV18
CY7C1527JV18
000
CY7C1518JV18
000
CY7C1520JV18
Revision Number
(31:29)
000
000
Version number.
Cypress Device ID 11010100010000100 11010100010001100 11010100010010100 11010100010100100 Defines the type of
(28:12)
SRAM.
Cypress JEDEC ID
(11:1)
00000110100
1
00000110100
1
00000110100
1
00000110100
1
Allows unique
identification of
SRAM vendor.
ID Register
Presence (0)
Indicates the
presence of an ID
register.
Scan Register Sizes
Register Name
Bit Size
Instruction
Bypass
3
1
ID
32
109
Boundary Scan
Instruction Codes
Instruction
EXTEST
Code
000
Description
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
100
Do Not Use: This instruction is reserved for future use.
SAMPLE/PRELOAD
Captures the input and output ring contents. Places the boundary scan register between TDI
and TDO. Does not affect the SRAM operation.
RESERVED
RESERVED
BYPASS
101
110
111
Do Not Use: This instruction is reserved for future use.
Do Not Use: This instruction is reserved for future use.
Places the bypass register between TDI and TDO. This operation does not affect SRAM
operation.
Document Number: 001-12559 Rev. *D
Page 17 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Boundary Scan Order
Bit #
0
Bump ID
6R
Bit #
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
Bump ID
10G
9G
Bit #
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
Bump ID
6A
5B
5A
4A
5C
4B
3A
2A
1A
2B
3B
1C
1B
3D
3C
1D
2C
3E
2D
2E
1E
2F
Bit #
84
Bump ID
1J
1
6P
85
2J
2
6N
11F
11G
9F
86
3K
3
7P
87
3J
4
7N
88
2K
5
7R
10F
11E
10E
10D
9E
89
1K
6
8R
90
2L
7
8P
91
3L
8
9R
92
1M
1L
9
11P
10P
10N
9P
93
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
10C
11D
9C
94
3N
95
3M
1N
96
10M
11N
9M
9D
97
2M
3P
11B
11C
9B
98
99
2N
9N
100
101
102
103
104
105
106
107
108
2P
11L
11M
9L
10B
11A
10A
9A
1P
3R
4R
10L
11K
10K
9J
4P
8B
5P
7C
3F
5N
6C
1G
1F
5R
9K
8A
Internal
10J
11J
11H
7A
3G
2G
1H
7B
6B
Document Number: 001-12559 Rev. *D
Page 18 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
DLL Constraints
Power Up Sequence in DDR-II SRAM
■ DLL uses K clock as its synchronizing input. The input must
have low phase jitter, which is specified as t
DDR-II SRAMs must be powered up and initialized in a
predefined manner to prevent undefined operations.
.
KC Var
■ The DLL functions at frequencies down to 120 MHz.
Power Up Sequence
■ If the input clock is unstable and the DLL is enabled, then the
DLL may lock onto an incorrect frequency, causing unstable
SRAM behavior. To avoid this, provide1024 cycles stable clock
to relock to the desired clock frequency.
■ Apply power and drive DOFF either HIGH or LOW (all other
inputs can be HIGH or LOW).
❐ Apply V before V
.
DD
DDQ
❐ Apply V
before V
or at the same time as V
.
DDQ
REF
REF
❐ Drive DOFF HIGH.
■ Provide stable DOFF (HIGH), power and clock (K, K) for 1024
cycles to lock the DLL.
Figure 3. Power Up Waveforms
K
K
Unstable Clock
> 1024 Stable clock
Stable)
Start Normal
Operation
/
V
Clock Start (Clock Starts after V
DD
DDQ
Stable (< +/- 0.1V DC per 50ns )
/
/
V
VDDQ
V
VDD
DD
DDQ
Fix High (or tie to V
)
DDQ
DOFF
Document Number: 001-12559 Rev. *D
Page 19 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Current into Outputs (LOW) ........................................ 20 mA
Static Discharge Voltage (MIL-STD-883, M 3015).... >2001V
Latch Up Current.................................................... >200 mA
Maximum Ratings
Exceeding maximum ratings may impair the useful life of the
device. These user guidelines are not tested.
Storage Temperature ................................. –65°C to +150°C
Ambient Temperature with Power Applied.. –55°C to +125°C
Operating Range
Ambient
Range
Commercial
Industrial
Temperature (T )
V
V
DDQ
Supply Voltage on V Relative to GND........–0.5V to +2.9V
A
DD
DD
0°C to +70°C
1.8 ± 0.1V
1.4V to
Supply Voltage on V
Relative to GND.......–0.5V to +V
DD
DDQ
V
DD
–40°C to +85°C
DC Applied to Outputs in High-Z .........–0.5V to V
+ 0.3V
DDQ
DC Input Voltage
.............................. –0.5V to V + 0.3V
DD
Electrical Characteristics
DC Electrical Characteristics
Over the Operating Range
Parameter
Description
Power Supply Voltage
IO Supply Voltage
Test Conditions
Min
1.7
1.4
Typ
Max
Unit
V
1.8
1.5
1.9
V
V
DD
V
V
V
V
V
V
V
I
V
DD
DDQ
OH
Output HIGH Voltage
Output LOW Voltage
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
Note 16
Note 17
V
V
/2 – 0.12
/2 – 0.12
– 0.2
V
V
/2 + 0.12
/2 + 0.12
V
DDQ
DDQ
DDQ
V
OL
DDQ
I
I
= −0.1 mA, Nominal Impedance
V
V
V
OH(LOW)
OL(LOW)
IH
OH
OL
DDQ
DDQ
= 0.1 mA, Nominal Impedance
V
0.2
V
SS
V
+ 0.1
V
+ 0.3
V
REF
DDQ
–0.3
V
– 0.1
V
IL
REF
Input Leakage Current
Output Leakage Current
Input Reference Voltage
GND ≤ V ≤ V
−5
−5
5
μA
μA
V
X
I
DDQ
I
GND ≤ V ≤ V
Output Disabled
5
OZ
I
DDQ,
V
Typical Value = 0.75V
0.68
0.75
0.95
1035
1035
1045
1055
800
800
800
900
410
410
415
415
380
380
380
380
REF
I
V
Operating Supply
V
= Max,
300 MHz
250 MHz
300 MHz
250 MHz
(x8)
(x9)
mA
DD
DD
DD
I
= 0 mA,
OUT
f = f
= 1/t
MAX
CYC
(x18)
(x36)
(x8)
mA
mA
mA
(x9)
(x18)
(x36)
(x8)
I
Automatic Power Down
Current
Max V
,
SB1
DD
Both Ports Deselected,
(x9)
V
≥ V or V ≤ V
IN
IH
IN
IL
(x18)
(x36)
(x8)
f = f
= 1/t
, Inputs
MAX
CYC
Static
(x9)
(x18)
(x36)
Notes
15. Power up: assumes a linear ramp from 0V to V (min) within 200 ms. During this time V < V and V
< V
DD
.
DD
IH
DD
DDQ
16. Outputs are impedance controlled. I = –(V
/2)/(RQ/5) for values of 175Ω < RQ < 350Ω.
OH
DDQ
17. Outputs are impedance controlled. I = (V
/2)/(RQ/5) for values of 175Ω < RQ < 350Ω.
OL
DDQ
18. V
(min) = 0.68V or 0.46V
, whichever is larger, V
(max) = 0.95V or 0.54V
, whichever is smaller.
REF
DDQ
REF
DDQ
19. The operation current is calculated with 50% read cycle and 50% write cycle.
Document Number: 001-12559 Rev. *D
Page 20 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
AC Electrical Characteristics
Over the Operating Range
Parameter
Description
Input HIGH Voltage
Input LOW Voltage
Test Conditions
Min
+ 0.2
REF
Typ
–
Max
Unit
V
V
V
–
IH
IL
V
–
–
V
– 0.2
V
REF
Capacitance
Tested initially and after any design or process change that may affect these parameters.
Parameter
Description
Input Capacitance
Test Conditions
Max
Unit
C
T = 25°C, f = 1 MHz, V = 1.8V, V = 1.5V
DDQ
5.5
8.5
6
pF
pF
pF
IN
A
DD
C
C
Clock Input Capacitance
Output Capacitance
CLK
O
Thermal Resistance
Tested initially and after any design or process change that may affect these parameters.
165 FBGA
Package
Parameter
Description
Test Conditions
Unit
Θ
Thermal Resistance
(Junction to Ambient)
Test conditions follow standard test methods and
procedures for measuring thermal impedance, in
accordance with EIA/JESD51.
16.3
°C/W
°C/W
JA
Θ
Thermal Resistance
(Junction to Case)
2.1
JC
Figure 4. AC Test Loads and Waveforms
V
REF = 0.75V
0.75V
VREF
VREF
0.75V
R = 50Ω
OUTPUT
ALL INPUT PULSES
1.25V
Z = 50Ω
0
OUTPUT
Device
Under
Test
R = 50Ω
L
0.75V
Device
Under
0.25V
5 pF
VREF = 0.75V
Slew Rate = 2 V/ns
ZQ
Test
ZQ
RQ =
RQ =
250Ω
250Ω
INCLUDING
JIG AND
SCOPE
(a)
(b)
Notes
20. Unless otherwise noted, test conditions assume signal transition time of 2V/ns, timing reference levels of 0.75V, V
= 0.75V, RQ = 250Ω, V
= 1.5V, input pulse
DDQ
REF
levels of 0.25V to 1.25V, and output loading of the specified I /I and load capacitance shown in (a) of AC Test Loads and Waveforms.
OL OH
Document Number: 001-12559 Rev. *D
Page 21 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Switching Characteristics
Over the Operating Range
300 MHz
250 MHz
Cypress Consortium
Parameter Parameter
Description
Unit
Min Max Min Max
t
t
t
t
t
t
V
(Typical) to the first Access
1
–
1
–
ms
ns
ns
ns
ns
ns
POWER
CYC
DD
t
t
t
t
t
K Clock and C Clock Cycle Time
Input Clock (K/K and C/C) HIGH
Input Clock (K/K and C/C) LOW
3.3 8.4 4.0 8.4
KHKH
KHKL
KLKH
KHKH
KHCH
1.32
1.32
–
–
–
1.6
1.6
1.8
–
–
–
KH
KL
K Clock Rise to K Clock Rise and C to C Rise (rising edge to rising edge) 1.49
KHKH
KHCH
K/K Clock Rise toC/C Clock Rise (rising edge to rising edge)
0.0 1.45 0.0 1.8
Setup Times
t
t
t
t
t
t
Address Setup to K Clock Rise
0.4
0.4
0.3
–
–
–
0.5
0.5
–
–
–
ns
ns
ns
SA
AVKH
IVKH
IVKH
Control Setup to Clock (K, K) Rise (LD, R/W)
SC
Double Data Rate Control Setup to Clock (K, K) Rise
0.35
SCDDR
(BWS , BWS , BWS , BWS )
0
1
2
3
t
t
D Setup to Clock (K and K) Rise
[X:0]
0.3
–
0.35
–
ns
SD
DVKH
Hold Times
t
t
t
t
t
t
Address Hold after Clock (K and K) Rise
0.4
0.4
0.3
–
–
–
0.5
0.5
–
–
–
ns
ns
ns
HA
KHAX
KHIX
KHIX
Control Hold after Clock (K and K) Rise (LD, R/W)
HC
Double Data Rate Control Hold after Clock (K and K) Rise
0.35
HCDDR
(BWS , BWS , BWS , BWS )
0
1
2
3
t
t
D Hold after Clock (K and K) Rise
[X:0]
0.3
–
0.35
–
ns
HD
KHDX
Output Times
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
C/C Clock Rise (or K/K in single clock mode) to Data Valid
Data Output Hold after Output C/C Clock Rise (Active to Active)
C/C Clock Rise to Echo Clock Valid
–
0.45
–
–
0.45 ns
ns
0.45 ns
ns
0.30 ns
CO
CHQV
–0.45
–
–0.45
–
–
DOH
CHQX
0.45
–
CCQO
CQOH
CQD
CHCQV
CHCQX
CQHQV
CQHQX
CQHCQL
CQHCQH
CHQZ
Echo Clock Hold after C/C Clock Rise
–0.45
–
–0.45
–
–
Echo Clock High to Data Valid
0.27
–
Echo Clock High to Data Invalid
–0.27
1.24
1.24
–
–0.30
1.55
1.55
–
–
–
–
ns
ns
ns
CQDOH
CQH
Output Clock (CQ/CQ) HIGH
–
CQ Clock Rise to CQ Clock Rise
–
(rising edge to rising edge)
CQHCQH
CHZ
Clock (C/C) Rise to High-Z (Active to High-Z)
0.45
–
0.45 ns
ns
Clock (C/C) Rise to Low-Z
–0.45
–0.45
–
CLZ
CHQX1
DLL Timing
t
t
t
t
t
t
Clock Phase Jitter
–
0.20
–
–
0.20 ns
KC Var
KC Var
DLL Lock Time (K, C)
K Static to DLL Reset
1024
30
1024
30
–
–
Cycles
ns
KC lock
KC Reset
KC lock
KC Reset
–
Notes
21. When a part with a maximum frequency above 250 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.
22. This part has an internal voltage regulator; t
is the time that the power is supplied above V min initially before a read or write operation can be initiated.
DD
POWER
23. These parameters are extrapolated from the input timing parameters (t
- 250 ps, where 250 ps is the internal jitter. An input jitter of 200 ps (t
) is already
KHKH
KC Var
included in the t
). These parameters are only guaranteed by design and are not tested in production.
KHKH
24. t
, t
are specified with a load capacitance of 5 pF as in (b) of AC Test Loads and Waveforms. Transition is measured ±100 mV from steady-state voltage.
CHZ CLZ
25. At any voltage and temperature t
is less than t
and t
less than t
.
CHZ
CLZ
CHZ
CO
Document Number: 001-12559 Rev. *D
Page 22 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Switching Waveforms
Figure 5. Read/Write/Deselect Sequence
READ
2
READ
3
NOP
4
NOP
5
WRITE
6
WRITE
7
READ
8
NOP
1
9
10
K
t
t
t
t
KHKH
KH
KL
CYC
K
LD
t
t
SC
HC
R/W
A
A0
A2
A3
A4
A1
t
HD
t
t
t
HD
SA
HA
t
t
SD
SD
DQ
Q00 Q01 Q10 Q11
D21 D30
Q40 Q41
D20
D31
t
CQDOH
t
t
KHCH
CLZ
t
t
CHZ
DOH
t
CO
t
CQD
C
t
t
t
t
t
KHKH
KHCH
KH
KL
CYC
C#
t
CCQO
t
CQOH
CQ
CQ#
t
t
CQH
t
CQHCQH
CCQO
t
CQOH
DON’T CARE
UNDEFINED
Notes
26. Q00 refers to output from address A0. Q01 refers to output from the next internal burst address following A0, that is, A0 + 1.
27. Outputs are disabled (High-Z) one clock cycle after a NOP.
28. In this example, if address A2 = A1, then data D20 = Q10 and D21 = Q11. Write data is forwarded immediately as read results. This note applies to the whole diagram.
Document Number: 001-12559 Rev. *D
Page 23 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Ordering Information
Not all of the speed, package, and temperature ranges are available. Please contact your local sales representative or
Speed
(MHz)
Package
Diagram
Operating
Range
Ordering Code
Package Type
300 CY7C1516JV18-300BZC
CY7C1527JV18-300BZC
CY7C1518JV18-300BZC
CY7C1520JV18-300BZC
CY7C1516JV18-300BZXC
CY7C1527JV18-300BZXC
CY7C1518JV18-300BZXC
CY7C1520JV18-300BZXC
CY7C1516JV18-300BZI
CY7C1527JV18-300BZI
CY7C1518JV18-300BZI
CY7C1520JV18-300BZI
CY7C1516JV18-300BZXI
CY7C1527JV18-300BZXI
CY7C1518JV18-300BZXI
CY7C1520JV18-300BZXI
250 CY7C1516JV18-250BZC
CY7C1527JV18-250BZC
CY7C1518JV18-250BZC
CY7C1520JV18-250BZC
CY7C1516JV18-250BZXC
CY7C1527JV18-250BZXC
CY7C1518JV18-250BZXC
CY7C1520JV18-250BZXC
CY7C1516JV18-250BZI
CY7C1527JV18-250BZI
CY7C1518JV18-250BZI
CY7C1520JV18-250BZI
CY7C1516JV18-250BZXI
CY7C1527JV18-250BZXI
CY7C1518JV18-250BZXI
CY7C1520JV18-250BZXI
51-85195 165-Ball Fine Pitch Ball Grid Array (15 x 17 x 1.4 mm)
51-85195 165-Ball Fine Pitch Ball Grid Array (15 x 17 x 1.4 mm) Pb-Free
51-85195 165-Ball Fine Pitch Ball Grid Array (15 x 17 x 1.4 mm)
51-85195 165-Ball Fine Pitch Ball Grid Array (15 x 17 x 1.4 mm) Pb-Free
51-85195 165-Ball Fine Pitch Ball Grid Array (15 x 17 x 1.4 mm)
51-85195 165-Ball Fine Pitch Ball Grid Array (15 x 17 x 1.4 mm) Pb-Free
51-85195 165-Ball Fine Pitch Ball Grid Array (15 x 17 x 1.4 mm)
51-85195 165-Ball Fine Pitch Ball Grid Array (15 x 17 x 1.4 mm) Pb-Free
Commercial
Industrial
Commercial
Industrial
Document Number: 001-12559 Rev. *D
Page 24 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Package Diagram
Figure 6. 165-Ball FBGA (15 x 17 x 1.40 mm), 51-85195
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Document Number: 001-12559 Rev. *D
Page 25 of 26
CY7C1516JV18, CY7C1527JV18
CY7C1518JV18, CY7C1520JV18
Document History Page
Document Title: CY7C1516JV18/CY7C1527JV18/CY7C1518JV18/CY7C1520JV18, 72-Mbit DDR-II SRAM 2-Word
Burst Architecture
Document Number: 001-12559
ISSUE
DATE
ORIG. OF
CHANGE
REV. ECN NO.
DESCRIPTION OF CHANGE
**
808457 See ECN
1273883 See ECN
VKN
VKN
New Data Sheet
*A
Removed t footnote
SD
Updated Logic block diagram for x18 and x36 parts
*B
1462589 See ECN VKN/AESA Converted from preliminary to final
Updated I /I specs
DD SB
Changed DLL minimum operating frequency from 80MHz to 120MHz
Changed t
max spec to 8.4ns
CYC
*C
*D
2189567 See ECN VKN/AESA Minor Change-Moved to the external web
2521072 06/25/08 NXR/PYRS Updated Logic block diagram, Changed the pin name from V /144M and V /288M
SS
SS
to NC/144M and NC/288M respectively in Pin Definition table, Changed JTAG ID
[31:29] from 001 to 000, Updated power up sequence waveform and its description,
Changed Ambient Temperature with Power Applied from “–10°C to +85°C” to “–55°C
to +125°C” in the “Maximum Ratings “ on page 20, Added footnote #19 related to
I
, Changed Θ spec from 16.2 to 16.3, Changed Θ spec from 2.3 to 2.1.
DD
JA JC
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© Cypress Semiconductor Corporation, 2007-2008. The information contained herein is subject to change without notice. Cypress Semiconductor Corporation assumes no responsibility for the use
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Use may be limited by and subject to the applicable Cypress software license agreement.
Document Number: 001-12559 Rev. *D
Revised June 25, 2008
Page 26 of 26
QDR RAMs and Quad Data Rate RAMs comprise a new family of products developed by Cypress, IDT, NEC, Renesas, and Samsung. All product and company names mentioned in this document
are the trademarks of their respective holders.
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