DESCRIPTION

The IDT72V3653/72V3663/72V3673 are pin and functionally compatible versions of the IDT723653/723663/723673, designed to run off a 3.3V supply for exceptionally low power consumption. These devices are monolithic, high-speed, low-power, CMOS unidirectional Synchronous (clocked) FIFO memory which supports clock frequencies up to 100 MHz and has read access times as

fast as 6.5 ns. The 2,048/4,096/8,192 x 36 dual-port SRAM FIFO buffers data from Port A to Port B. FIFO data on Port B can output in 36-bit, 18-bit, or 9-bit formats with a choice of Big- or Little-Endian configurations.

FEATURES

• Memory storage capacity:

IDT72V3653 – 2,048 x 36

IDT72V3663 – 4,096 x 36

IDT72V3673 – 8,192 x 36

• Clock frequencies up to 100 MHz (6.5 ns access time)

• Clocked FIFO buffering data from Port A to Port B

• IDT Standard timing (using EF and FF) or First Word Fall Through Timing (using OR and IR flag functions)

• Programmable Almost-Empty and Almost-Full flags; each has five default offsets (8, 16, 64, 256 and 1,024)

• 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

• Retransmit Capability

• 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)

• Easily expandable in width and depth

• Auto power down minimizes power dissipation

• Available in a space-saving 128-pin Thin Quad Flatpack (TQFP)

• Pin and functionally compatible versions of the 5V operating IDT723653/723663/723673

• Pin compatible with the lower density parts, IDT72V3623/72V3633/72V3643

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