CY7C1352G
4-Mbit (256 K × 18) Pipelined SRAM with
NoBL™ Architecture
4-Mbit (256
K × 18) Pipelined SRAM with NoBL™ Architecture
Features
Functional Description
■ Pin compatible and functionally equivalent to ZBT™ devices
The CY7C1352G is a 3.3 V, 256 K × 18 synchronous-pipelined
burst SRAM designed specifically to support unlimited true
back-to-back read/write operations without the insertion of wait
states. The CY7C1352G is equipped with the advanced No Bus
Latency™ (NoBL™) logic required to enable consecutive
read/write operations with data being transferred on every clock
cycle. This feature dramatically improves the throughput of the
SRAM, especially in systems that require frequent write/read
transitions.
■ Internally self-timed output buffer control to eliminate the need
to use OE
■ Byte write capability
■ 256 K × 18 common I/O architecture
■ 3.3 V core power supply (VDD
)
■ 2.5 V/3.3 V I/O power supply (VDDQ
)
All synchronous inputs pass through input registers controlled by
the rising edge of the clock. All data outputs pass through output
registers controlled by the rising edge of the clock. The clock
input is qualified by the clock enable (CEN) signal, which, when
deasserted, suspends operation and extends the previous clock
cycle. Maximum access delay from the clock rise is 4.0 ns
(133-MHz device).
■ Fast clock-to-output times
❐ 4.0 ns (for 133-MHz device)
■ Clock enable (CEN) pin to suspend operation
■ Synchronous self-timed writes
■ Asynchronous output enable (OE)
Write operations are controlled by the two byte write select
(BW[A:B]) and a write enable (WE) input. All writes are conducted
with on-chip synchronous self-timed write circuitry.
■ Available in Pb-free 100-pin TQFP package
■ Burst capability – linear or interleaved burst order
■ ZZ sleep mode option and stop clock option
Three synchronous chip enables (CE1, CE2, CE3) and an
asynchronous output enable (OE) provide for easy bank
selection and output tri-state control. In order to avoid bus
contention, the output drivers are synchronously tri-stated during
the data portion of a write sequence.
Selection Guide
Description
133 MHz Unit
Maximum access time
4.0
225
40
ns
Maximum operating current
Maximum CMOS standby current
mA
mA
Errata: For information on silicon errata, see "Errata" on page 18. Details include trigger conditions, devices affected, and proposed workaround.
Cypress Semiconductor Corporation
Document Number: 38-05514 Rev. *L
•
198 Champion Court
•
San Jose, CA 95134-1709
•
408-943-2600
Revised June 24, 2013