Functional Description

The CY7C436X4AV is a monolithic, high-speed, low-power, CMOS Bidirectional Synchronous FIFO memory which supports clock frequencies up to 133 MHz and has Read access times as fast as 6 ns. Two independent 1K/4K/16K × 36 dual-port SRAM FIFOs on board each chip buffer data in opposite directions. FIFO data on Port B can be input and output in 36-bit, 18-bit, or 9-bit formats with a choice of Big or Little Endian configurations.

Features

? 3.3V high-speed, low-power, bidirectional, First-In

First-Out (FIFO) memories w/ bus matching capabilities

? 1K × 36 × 2 (CY7C43644AV)

? 4K × 36 × 2 (CY7C43664AV)

? 16K × 36 × 2 (CY7C43684AV)

? 0.25-micron CMOS for optimum speed/power

? High-speed 133-MHz operation (7.5-ns Read/Write cycle times)

? Low power

— ICC= 60 mA

— ISB= 10 mA

? Fully asynchronous and simultaneous Read and Write operation permitted

? Mailbox bypass register for each FIFO

? Parallel and Serial Programmable Almost Full and Almost Empty flags

? Retransmit function

? Standard or FWFT user selectable mode

? Partial Reset

? Big or Little Endian format for word or byte bus sizes

? 128-pin TQFP packaging

? Easily expandable in width and depth