CY7C1410JV18_09 Datasheet, PDF (1/26 Pages) Cypress Semiconductor – 36-Mbit QDR-II SRAM 2-Word Burst Architecture

CY7C1410JV18, CY7C1425JV18
CY7C1412JV18, CY7C1414JV18
36-Mbit QDR™-II SRAM 2-Word
Burst Architecture
Features
■ Separate Independent Read and Write Data Ports
❐ Supports concurrent transactions
■ 267 MHz Clock for High Bandwidth
■ 2-word Burst on all Accesses
■ Double Data Rate (DDR) Interfaces on both Read and Write
Ports (data transferred at 534 MHz) at 267 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
■ Single Multiplexed Address Input Bus latches Address Inputs
for both Read and Write Ports
■ Separate Port Selects for Depth Expansion
■ Synchronous Internally Self-timed Writes
■ QDR™-II operates with 1.5 Cycle Read latency when Delay
Lock Loop (DLL) is enabled
■ Operates like a QDR-I device with 1 Cycle Read Latency in
DLL Off Mode
■ Available in x8, x9, x18, and x36 configurations
■ Full Data Coherency, providing most Current Data
■ Core V_DD = 1.8V (±0.1V); I/O V_DDQ = 1.4V to V_DD
■ Available in 165-Ball FBGA Package (15 x 17 x 1.4 mm)
■ Offered in both Pb-free and non Pb-free packages
■ Variable Drive HSTL Output Buffers
■ JTAG 1149.1 Compatible Test Access Port
■ Delay Lock Loop (DLL) for Accurate Data Placement
Configurations
CY7C1410JV18 – 4M x 8
CY7C1425JV18 – 4M x 9
CY7C1412JV18 – 2M x 18
CY7C1414JV18 – 1M x 36
Functional Description
The CY7C1410JV18, CY7C1425JV18, CY7C1412JV18, and
CY7C1414JV18 are 1.8V Synchronous Pipelined SRAMs,
equipped with QDR-II architecture. QDR-II architecture consists
of two separate ports: the read port and the write port, to access
the memory array. The read port has data outputs to support read
operations and the write port has data inputs to support write
operations. QDR-II architecture has separate data inputs and
data outputs to eliminate the need to ‘turnaround’ the data bus
required with common I/O devices. Access to each port is
accomplished through a common address bus. The read
address is latched on the rising edge of the K clock and the write
address is latched on the rising edge of the 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 provided with DDR interfaces. Each address location
is associated with two 8-bit words (CY7C1410JV18), 9-bit words
(CY7C1425JV18), 18-bit words (CY7C1412JV18), or 36-bit
words (CY7C1414JV18) that burst sequentially into or out of the
device. Because data is transferred into and out of the device on
every rising edge of both input clocks (K and K and C and C),
memory bandwidth is maximized while simplifying system
design by eliminating bus ‘turnarounds’.
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 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.
Selection Guide
Description
Maximum Operating Frequency
Maximum Operating Current
267 MHz
267
x8
1330
x9
1330
x18
1370
x36
1460
250 MHz
250
1200
1200
1230
1290
Unit
MHz
mA
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 001-12561 Rev. *F
• San Jose, CA 95134-1709 • 408-943-2600
Revised July 31, 2009
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