Functional Description

The CY7C4261/71/81/91V are high-speed, low-power FIFO memories with clocked read and write interfaces. All are nine bits wide. The CY7C4261/71/81/91V are pin-compatible to the CY7C42x1V Synchronous FIFO family.

特性 Features

? 3.3V operation for low power consumption and easy

integration into low-voltage systems

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

memories

? 16K × 9 (CY7C4261V)

? 32K × 9 (CY7C4271V)

? 64K × 9 (CY7C4281V)

? 128K × 9 (CY7C4291V)

? 0.35-micron CMOS for optimum speed/power

? High-speed 100-MHz operation (10-ns read/write cycle

times)

? Low power

— ICC = 25 mA

— ISB = 4 mA

? Fully asynchronous and simultaneous read and write

operation

? Empty, Full, and programmable Almost Empty and

Almost Full status flags

? Output Enable (OE) pin

? Independent read and write enable pins

? Supports free-running 50 duty cycle clock inputs

? Width- Expansion capability

? Pin-compatible 3.3V solutions for CY7C4261/71/81/91

? Pin-compatible density upgrade to CY7C42X1V family

? Pb-Free Packages Available