Functional Description

The CY7C1352B is a 3.3V 256K by 18 synchronous-pipelined Burst SRAM designed specifically to support unlimited true back-to-back Read/Write operations without the insertion of wait states. The CY7C1352B 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 Read/Write transitions. The CY7C1352B is pin/functionally compatible to ZBT SRAMs MCM63Z819 and MT55L256L18P.

Features

• Pin compatible and functionally equivalent to ZBT™ devices MCM63Z818 and MT55L256L18P

• Supports 166-MHz bus operations with zero wait states

— Data is transferred on every clock

• Internally self-timed output buffer control to eliminate the need to use OE

• Fully registered (inputs and outputs) for pipelined operation

• Byte Write Capability

• 256K x 18 common I/O architecture

• Single 3.3V power supply

• Fast clock-to-output times

— 3.5 ns (for 166-MHz device)

— 3.8 ns (for 150-MHz device)

— 4.0 ns (for 143-MHz device)

— 4.2 ns (for 133-MHz device)

— 5.0 ns (for 100-MHz device)

— 7.0 ns (for 80-MHz device)

• Clock Enable (CEN) pin to suspend operation

• Synchronous self-timed writes

• Asynchronous output enable

• JEDEC-standard 100-pin TQFP package

• Burst Capability—linear or interleaved burst order