DESCRIPTION:
The IDT723631/723641/723651 is a monolithic highspeed, low-power, CMOS clocked FIFO memory.

FEATURES:
• Free-running CLKA and CLKB can be asynchronous or
    coincident (permits simultaneous reading and writing of
    data on a single clock edge)
• Clocked FIFO buffering data from Port A to Port B
• Storage capacity: IDT723631 - 512 x 36
                               IDT723641 - 1024 x 36
                               IDT723651 - 2048 x 36
• Synchronous read retransmit capability
• Mailbox register in each direction
• Programmable Almost-Full and Almost-Empty flags
• Microprocessor interface control logic
• Input-Ready (IR) and Almost-Full (AF) flags synchronized
    by CLKA
• Output-Ready (OR) and Almost-Empty (AE) flags synchronized by CLKB
• Low-power 0.8-micron advanced CMOS technology
• Supports clock frequencies up to 67 MHz
• Fast access times of 11 ns
• Available in 132-pin plastic quad flat package (PQF) or
    space-saving 120-pin thin quad flat package (TQFP)
• Industrial temperature range (-40°C to +85°C) is available,
    tested to military electrical specifications