Functional Description

The CY7C4261/71 are high-speed, low-power FIFO memories with clocked read and write interfaces. All are nine bits wide. The CY7C4261/71 are pin-compatible to the CY7C42X1 Synchronous FIFO family. The CY7C4261/71 can be cascaded to increase FIFO width. 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

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

• 16K × 9 (CY7C4261)

• 32K × 9 (CY7C4271)

• 0.5-micron CMOS for optimum speed/power

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

• Low power — ICC = 35 mA

• Fully asynchronous and simultaneous read and write operation

• Empty, Full, Half Full, and programmable Almost Empty and Almost Full status flags

• TTL-compatible

• Output Enable (OE) pins

• Independent read and write enable pins

• Center power and ground pins for reduced noise

• Supports free-running 50 duty cycle clock inputs

• Width-Expansion Capability

• Military temp SMD Offering – CY7C4271-15LMB

• 32-pin PLCC/LCC and 32-pin TQFP

• Pin-compatible density upgrade to CY7C42X1 family

• Pin-compatible density upgrade to IDT72201/11/21/31/41/51

• Pb-Free Packages Available