Texas Instruments SN74ABT7820-25PN

FIFO Mem Async Dual Bi-Dir 512 x 18 x 2 80-Pin LQFP Tray

74ABT7820 Tray 74ABT BICMOS fifo memory 40MHz 95mA 0.5mm 15ns

IC SYNC FIFO MEM 512X18X2 80LQFP / Asynchronous FIFO 18K (512 x 18 x 2) Bi-Directional 40MHz 15ns 80-LQFP (12x12)

IC SYNC FIFO MEM 512X18X2 80LQFP

A FIFO memory is a storage device that allows data to be written into and read from its array at independent data rates. The SN74ABT7820 is arranged as two 512 18-bit FIFOs for high speed and fast access times. It processes data at rates up to 67 MHz with access times of 12 ns in a bit-parallel format. The SN74ABT7820 consists of bus-transceiver circuits, two 512 18 FIFOs, and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal FIFO memories. Enable inputs (GAB and GBA) control the transceiver functions. The SAB and SBA control inputs select whether real-time or stored data is transferred. The circuitry used for select control eliminates the typical decoding glitch that occurs in a multiplexer during the transition between stored and real-time data. Figure 1 illustrates the eight fundamental bus-management functions that can be performed with the SN74ABT7820. The SN74ABT7820 is characterized for operation from 0C to 70C.