SN74ACT7882
2048 × 18 CLOCKED FIRST-IN, FIRST-OUT MEMORY

SCAS445A - JUNE 1994 - REVISED DECEMBER 1996

features

• Member of the Texas Instruments Widebus^TM Family
• Independent Asynchronous Inputs and Outputs
• Read and Write Operations Can Be Synchronized to Independent System Clocks
• Programmable Almost-Full/Almost-Empty Flag
• Pin-to-Pin Compatible With SN74ACT7881 and SN74ACT7811
• Input-Ready, Output-Ready, and Half-Full Flags
• Cascadable in Word Width and/or Word Depth (See Application Information)
• Fast Access Times of 11ns With a 50-pF Load
• High Output Drive for Direct Bus Interface
• Package Options Include 68-Pin PLCC (FN) or Space-Saving 80-Pin Shrink Quad Flat (PN) Packages

Widebus is a trademark of Texas Instruments Incorporated.

description

A FIFO memory is a storage device that allows data to be written into and read from its array at independent data rates. The SN74ACT7882 is organized as 2048 bits deep × 18 bits wide. The SN74ACT7882 processes data at rates up to 67 MHz and access times of 11 ns in a bit-parallel format. Data outputs are noninverting with respect to the data inputs. Expansion is easily accomplished in both word width and word depth.

The SN74ACT7882 has normal input bus-to-output bus asynchronous operation. The special enable circuitry adds the ability to synchronize independent reads and writes to their respective system clocks.

The SN74ACT7882 is characterized for operation from 0°C to 70°C.