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
• Green parts available, see ordering information