Functional Description

The CY7C4282/CY7C4292 are high-speed, low-power, FIFO memories with clocked read and write interfaces. All devices are nine bits wide. The CY7C4282/CY7C4292 can be cascaded to increase FIFO depth. 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, video and communications buffering.

Features

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

• 64K × 9 (CY7C4282)

• 128K × 9 (CY7C4292)

• 0.5-micron CMOS for optimum speed/power

• High-speed, near-zero latency (true dual-ported memory cell), 100-MHz operation (10-ns read/write cycle times)

• Low power

— ICC=40 mA

— ISB = 2 mA

• Fully asynchronous and simultaneous read and write operation

• Empty, Full, and Programmable Almost Empty and Almost Full status flags

• TTL-compatible

• Retransmit function

• Output Enable (OE) pin

• Independent read and write enable pins

• Supports free-running 50 duty cycle clock inputs

• Width-Expansion Capability

• Depth-Expansion Capability through token-passing scheme (no external logic required)

• 64-pin 10 × 10 STQFP