CY7C1512AV18-250BZC Cypress Semiconductor Corp, CY7C1512AV18-250BZC Datasheet - Page 9

• Manufacturer Part Number: CY7C1512AV18-250BZC
• Description: IC SRAM 72MBIT 250MHZ 165TFBGA
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C1512AV18-250BZC

• Format - Memory: RAM
• Memory Type: SRAM - Synchronous, QDR II
• Memory Size: 72M (4M x 18)
• Speed: 250MHz
• Interface: Parallel
• Voltage - Supply: 1.7 V ~ 1.9 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 165-TFBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Echo Clocks
Echo clocks are provided on the QDR-II to simplify data capture
on high-speed systems. Two echo clocks are generated by the
QDR-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 QDR-II. In the 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
Switching Characteristics
Application Example
Figure 1
Document #: 001-06984 Rev. *C
MASTER
ASIC)
(CPU
BUS
or
shows two QDR-II used in an application.
CLKIN/CLKIN#
Delayed K#
DATA OUT
Delayed K
Source K#
Source K
Address
DATA IN
BWS#
WPS#
RPS#
Vt
on page 23.
R
R
R = 50ohms
D
A
R
P
S
#
Vt = Vddq/2
W
P
S
#
SRAM #1
Figure 1. Application Example
W
B
S
#
C C#
CQ/CQ#
K
ZQ
K#
Q
R = 250ohms
DLL
These chips use 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 clocks 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 QDR-I mode (with one cycle
latency and a longer access time). For information refer to the
application note DLL Considerations in QDRII/DDRII..
CY7C1510AV18, CY7C1525AV18
CY7C1512AV18, CY7C1514AV18
D
A
R
Vt
Vt
R
P
S
#
W
P
S
#
W
B
S
#
SRAM #2
C C#
CQ/CQ#
K
ZQ
K#
Q
R = 250ohms
Page 9 of 28
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