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