Functional Description

The CY7C1345B is a 3.3V, 128K by 36 synchronous cache RAM designed to interface with high-speed microprocessors with minimum glue logic. Maximum access delay from clock rise is 7.5 ns (117-MHz version). A 2-bit on-chip counter captures the first address in a burst and increments the address automatically for the rest of the burst access.

Features
• Supports 117-MHz microprocessor cache systems with
zero wait states
• 128K by 36 common I/O
• Fast clock-to-output times
— 7.5 ns (117-MHz version)
• Two-bit wrap-around counter supporting either
interleaved or linear burst sequence
• Separate processor and controller address strobes
provide direct interface with the processor and external
cache controller
• Synchronous self-timed write
• Asynchronous output enable
• Supports 3.3V & 2.5V I/O levels
• ZZ “sleep” mode