DESCRIPTION:
The IDT723624/723634/723644 is a monolithic, high-speed, low-power, CMOS bidirectional synchronous (clocked) FIFO memory which supports clock frequencies up to 83 MHz and has read access times as fast as 8 ns. Two independent 256/512/1,024 x 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:
• Memory storage capacity:
   IDT723624 – 256 x 36 x 2
   IDT723634 – 512 x 36 x 2
   IDT723644 – 1,024 x 36 x 2
• Clock frequencies up to 83 MHz (8 ns access time)
• Two independent clocked FIFOs buffering data in opposite directions
• Select IDT Standard timing (using EFA, EFB, FFA, and FFB flags functions) or First Word Fall Through Timing (using ORA, ORB, IRA, and IRB flag functions)
• Programmable Almost-Empty and Almost-Full flags; each has three default offsets (8, 16 and 64)
• Serial or parallel programming of partial flags
• Port B bus sizing of 36-bits (long word), 18-bits (word) and 9-bits (byte)
• Big- or Little-Endian format for word and byte bus sizes
• Master Reset clears data and configures FIFO, Partial Reset clears data but retains configuration settings
• Mailbox bypass registers for each FIFO
• Free-running CLKA and CLKB may be asynchronous or coincident (simultaneous reading and writing of data on a single clock edge is permitted)
• Auto power down minimizes power dissipation
• Available in space saving 128-pin Thin Quad Flatpack (TQFP)
• Industrial temperature range (–40°C to +85°C) is available