Functional Description

The CY7C48X1 are Double high-speed, low-power, first-in first-out (FIFO) memories with clocked read and write interfaces. All are 9 bits wide and operate as two separate FIFOs. The CY7C48X1 are pin-compatible to IDT728X1. Programmable features include Almost Full/Almost Empty flags. These FIFOs provide solutions for a wide variety of data buffering needs, including high-speed data acquisition, multiprocessor interfaces, and communications buffering.

Features

• Double high speed, low power, first-in first-out (FIFO) memories

• Double 256 x 9 (CY7C4801)

• Double 512 x 9 (CY7C4811)

• Double 1K x 9 (CY7C4821)

• Double 2K x 9 (CY7C4831)

• Double 4K x 9 (CY7C4841)

• Double 8K x 9 (CY7C4851)

• Functionally equivalent to two CY7C4201/4211/4221/ 4231/4241/4251 FIFOs in a single package

• 0.65 micron CMOS for optimum speed/power

• High-speed 100-MHz operation (10 ns read/write cycle times)

• Offers optimal combination of large capacity, high speed, design flexibility, and small footprint

• Fully asynchronous and simultaneous read and write operation

• Four status flags per device: Empty, Full, and programmable Almost Empty/Almost Full

• Low power — ICC1= 60mA

• Output Enable (OEA/OEB) pins

• Depth Expansion Capability

• Width Expansion Capability

• Space-saving 64-pin TQFP

• Pin compatible and functionally equivalent to IDT72801, 72811, 72821, 72831, 72841,72851