Functional Description[1]
The CY7C1355B/CY7C1357B is a 3.3V, 256K x 36/ 512K x 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 CY7C1355B/CY7C1357B 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 systems that require frequent Write-Read transitions.

Features
• No Bus Latency™ (NoBL™) architecture eliminates dead cycles between write and read cycles.
• Can support up to 133-MHz bus operations with zero wait states
   — Data is transferred on every clock
• Pin compatible and functionally equivalent to ZBT™ devices
• Internally self-timed output buffer control to eliminate the need to use OE
• Registered inputs for flow-through operation
• Byte Write capability
• 3.3V/2.5V I/O power supply
• Fast clock-to-output times
   — 6.5 ns (for 133-MHz device)
   — 7.0 ns (for 117-MHz device)
   — 7.5 ns (for 100-MHz device)
• Clock Enable (CEN) pin to enable clock and suspend operation
• Synchronous self-timed writes
• Asynchronous Output Enable
• Offered in JEDEC-standard 100 TQFP, 119-Ball BGA and 165-Ball fBGA packages
• Three chip enables for simple depth expansion.
• Automatic Power-down feature available using ZZ mode or CE deselect.
• JTAG boundary scan for BGA and fBGA packages
• Burst Capability—linear or interleaved burst order
• Low standby power