Functional Description
The CY7C436X2 is a monolithic, high-speed, low-power, CMOS Bidirectional Synchronous (clocked) 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 x 36 dual-port SRAM FIFOs on board each chip buffer data in opposite directions.

Features
• High-speed, low-power, bidirectional, First-In, First-Out (FIFO) memories
• 1Kx36x2 (CY7C43642)
• 4Kx36x2 (CY7C43662)
• 16Kx36x2 (CY7C43682)
• 0.35-micron CMOS for optimum speed/power
• High speed 133-MHz operation (7.5-ns read/write cycle times)
• Low power
    — ICC= 100 mA
    — ISB= 10 mA
• Fully asynchronous and simultaneous read and write operation permitted
• Mailbox bypass register for each FIFO
• Parallel Programmable Almost Full and Almost Empty flags
• Retransmit function
• Standard or FWFT mode user selectable
• 120-pin TQFP packaging
• Easily expandable in width and depth