SN74ACT7881
1024 × 18 CLOCKED FIRST-IN, FIRST-OUT MEMORY

SCAS227C - FEBRUARY 1993 - REVISED FEBRUARY 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 SN74ACT7882, SN74ACT7884, and SN74ACT7811
• Input-Ready, Output-Ready, and Half-Full Flags
• Expandable in Word Width and/or Word Depth
• Fast Access Times of 11 ns 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 SN74ACT7881 is organized as 1024 × 18 bits. The SN74ACT7881 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 SN74ACT7881 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 SN74ACT7881 is characterized for operation from 0°C to 70°C.