DESCRIPTION:
The IDT723622/723632/723642 are a monolithic, high-speed, low-power, CMOS Bidirectional SyncFIFO (clocked) memory which supports clock frequencies up to 66.7MHz and have read access times as fast as 10ns. Two independent 256/512/1,024 x 36 dual-port SRAM FIFOs on board each chip buffer data in opposite directions. Communication between each port may bypass the FIFOs via two 36-bit mailbox registers. Each mailbox register has a flag to signal when new mail has been stored.
   
FEATURES:
• Memory storage capacity:
    IDT723622 – 256 x 36 x 2
    IDT723632 – 512 x 36 x 2
    IDT723642 – 1,024 x 36 x 2
• Free-running CLKA and CLKB may be asynchronous or
    coincident (simultaneous reading and writing of data on a single
    clock edge is permitted)
• Two independent clocked FIFOs buffering data in opposite
    directions
• Mailbox bypass register for each FIFO
• Programmable Almost-Full and Almost-Empty flags
• Microprocessor Interface Control Logic
• IRA, ORA, AEA, and AFA flags synchronized by CLKA
• IRB, ORB, AEB, and AFB flags synchronized by CLKB
• Supports clock frequencies up to 66.7MHz
• Fast access times of 10ns
• Available in space-saving 120-pin Thin Quad Flatpack (TQFP)
• Green parts available