Functional Description
The CY7C436X3AV is a monolithic, high-speed, low-power, CMOS Unidirectional Synchronous FIFO memory which supports clock frequencies up to 133 MHz and has Read access times as fast as 6 ns.

FEATUREs
• High-speed, low-power, unidirectional, First-In First-Out (FIFO) memories with bus-matching capabilities
• 1K × 36 (CY7C43643AV)
• 4K × 36 (CY7C43663AV)
• 16K × 36 (CY7C43683AV)
• 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