Cypress Semiconductor CY7C2563KV18 Configurations

Features
Separate independent read and write data ports
■
Supports concurrent transactions
❐
550 MHz clock for high bandwidth
■
4-word burst for reducing address bus frequency
■
Double Data Rate (DDR) interfaces on both read and write
■
ports (data transferred at 1100 MHz) at 550 MHz
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
■
On-Die Termination (ODT) feature
■
Supported for D , BWS
❐
[x:0]
Single multiplexed address input bus latches address inputs
■
for read and write ports
Separate port selects for depth expansion
■
Synchronous internally self-timed writes
■
QDR™-II+ operates with 2.5 cycle read latency when DOFF is
■
asserted HIGH
Operates similar to QDR-I device with 1 cycle read latency
■
when DOFF is asserted LOW
Available in x8, x9, x18, and x36 configurations
■
Full data coherency, providing most current data
■
Core V = 1.8V± 0.1V; IO V
■
DD
Supports both 1.5V and 1.8V IO supply
❐
HSTL inputs and variable drive HSTL output buffers
■
Available in 165-Ball FBGA package (13 x 15 x 1.4 mm)
■
Offered in both Pb-free and non Pb-free packages
■
JTAG 1149.1 compatible test access port
■
Phase Locked Loop (PLL) for accurate data placement
■
Table 1. Selection Guide
Description
Maximum Operating Frequency
Maximum Operating Current
Note
1. The Cypress QDR-II+ devices surpass the QDR consortium specification and can support V
Cypress Semiconductor Corporation
Document Number: 001-15887 Rev. *E
PRELIMINARY
Architecture (2.5 Cycle Read Latency) with ODT
, and K/K inputs
[x:0]
[1]
= 1.4V to V
DDQ DD
x8
x9
x18
x36
• 198 Champion Court
CY7C2561KV18, CY7C2576KV18
CY7C2563KV18, CY7C2565KV18
72-Mbit QDR™-II+ SRAM 4-Word Burst
Configurations
With Read Cycle Latency of 2.5 cycles:
CY7C2561KV18 – 8M x 8
CY7C2576KV18 – 8M x 9
CY7C2563KV18 – 4M x 18
CY7C2565KV18 – 2M x 36

Functional Description

The CY7C2561KV18, CY7C2576KV18, CY7C2563KV18, and
CY7C2565KV18 are 1.8V Synchronous Pipelined SRAMs,
equipped with QDR-II+ architecture. Similar to QDR-II archi-
tecture, QDR-II+ architecture consists of two separate ports: the
read port and the write port to access the memory array. The
read port has dedicated data outputs to support read operations
and the write port has dedicated data inputs to support write
operations. QDR-II+ architecture has separate data inputs and
data outputs to completely eliminate the need to "turn-around"
the data bus that exists with common IO devices. Each port is
accessed through a common address bus. Addresses for read
and write addresses are latched on alternate rising edges of the
input (K) clock. Accesses to the QDR-II+ read and write ports are
completely independent of one another. To maximize data
throughput, both read and write ports are equipped with DDR
interfaces. Each address location is associated with four 8-bit
words (CY7C2561KV18), 9-bit words (CY7C2576KV18), 18-bit
words (CY7C2563KV18), or 36-bit words (CY7C2565KV18) that
burst sequentially into or out of the device. Because data is trans-
ferred into and out of the device on every rising edge of both input
clocks (K and K), memory bandwidth is maximized while simpli-
fying system design by eliminating bus "turn-arounds".
These devices have an On-Die Termination feature supported
for D , BWS , and K/K inputs, which helps eliminate
[x:0] [x:0]
external termination resistors, reduce cost, reduce board area,
and simplify board routing.
Depth expansion is accomplished with port selects, which
enables each port to operate independently.
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.
550 MHz 500 MHz
550 500
900 830
900 830
920 850
1310 1210
= 1.4V to V
DDQ DD
,
• San Jose
450 MHz 400 MHz
450 400
760 690
760 690
780 710
1100 1000
.
CA 95134-1709 • 408-943-2600
Revised April 24, 2009
Unit
MHz
mA
[+] Feedback