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CY7C4221 CY7C42311 K / 2 K × 9 Synchronous FIFOs
CY7C4221 / CY7C4231
1 K / 2 K × 9 Synchronous FIFOs
1 K / 2 K × 9 Synchronous FIFOs
Features
■ High-speed, low-power, first-in first-out (FIFO) memories ❐ 1 K × 9 (CY7C4221) ❐ 2 K × 9 (CY7C4231)
■ High-speed 66.7 MHz operation (15 ns read/write cycle time) ■ Low power (ICC = 35 mA) ■ Fully asynchronous and simultaneous read and write operation ■ Empty, Full, and Programmable Almost Empty and Almost Full
status flags ■ TTL-compatible ■ Output Enable (OE) pin to three-state the output bus ■ Independent read and write enable pins ■ Center power and ground pins for reduced noise ■ Width-expansion capability ■ Space saving 7 mm × 7 mm 32-pin TQFP and 32-pin PLCC
packages available ■ Pin-compatible and functionally equivalent to IDT72221 &
72231 ■ Pb-free packages available
Functional Description
The CY7C42X1 are high-speed, low-power FIFO memories with clocked read and write interfaces. All are nine bits.