Functional Description
The CY7C1353B is a 3.3V, 256K by 18 Synchronous Flow-Through Burst SRAM designed specifically to support unlimited true back-to-back Read/Write operations without the insertion of wait states. The CY7C1353B 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 data through the SRAM, especially in sys tems that require frequent Write-Read transitions. The CY7C1353B is pin/functionally compatible to ZBT SRAMs MCM63Z819 and MT55L256L18F.

FEATUREs
• Pin compatible and functionally equivalent to ZBT™ devices MCM63Z819 and MT55L256L18F
• Supports 117-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
• Registered inputs for flow-through operation
• Byte Write capability
• 256K x 18 common I/O architecture
• Single 3.3V power supply
• Fast clock-to-output times
— 7.5 ns (for 117- MHz device)
— 8.5 ns (for 100-MHz device)
— 11.0 ns (for 66-MHz device)
— 12. 0 ns (for 50-MHz device)
— 14.0 ns (for 40-MHz device)
• Clock Enable (CEN) pin to suspend operation
• Synchronous self-timed writes
• Asynchronous Output Enable
• JEDEC-standard 100 TQFP package
• Burst Capability—linear or interleaved burst order
• Low standby power