DESCRIPTION

The IDT723652/723662/723672 is a monolithic, high-speed, low-power, CMOS Bidirectional SyncFIFO (clocked) memories which support clock frequencies up to 83MHz and have read access times as fast as 8ns. Two independent 2,048/4,096/8,192 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:

IDT723652 – 2,048 x 36 x 2

IDT723662 – 4,096 x 36 x 2

IDT723672 – 8,192 x 36 x 2

• Supports clock frequencies up to 83MHz

• Fast access times of 8ns

• 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

• FFA/IRA, EFA/ORA, AEA, and AFA flags synchronized by CLKA

• FFB/IRB, EFB/ORB, AEB, and AFB flags synchronized by CLKB

• 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)

• Available in 132-pin Plastic Quad Flatpack (PQFP) or space-saving 120-pin Thin Quad Flatpack (TQFP)

• Pin compatible to the lower density parts, IDT723622/723632/723642

• Industrial temperature range (–40°C to +85°C) is available