SN74ACT7811
1024 × 18
CLOCKED FIRST-IN, FIRST-OUT MEMORY

SCAS151C - JANUARY 1991 - REVISED FEBRUARY 1996

features

• Member of the Texas Instruments Widebus^TM Family
• Independent Asynchronous Inputs and Outputs
• 1024 Words × 18 Bits
• Read and Write Operations Can Be Synchronized to Independent System Clocks
• Programmable Almost-Full/Almost-Empty Flag
• Pin-to-Pin Compatible With SN74ACT7881, SN74ACT7882, and SN74ACT7884
• Input-Ready, Output-Ready, and Half-Full Flags
• Cascadable in Word Width and/or Word Depth
• Fast Access Times of 15 ns With a 50-pF Load
• High-Output Drive for Direct Bus Interface
• Available in 68-Pin PLCC (FN) and Space-Saving 80-Pin Thin 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 SN74ACT7811 is a 1024 × 18-bit FIFO for high speed and fast access times. It processes data at rates up to 40 MHz and access times of 15 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 SN74ACT7811 has normal input-bus-to-output-bus asynchronous operation. The special enable circuitry adds the ability to synchronize independent read and write (interrupts or requests) to their respective system clock.

The SN74ACT7811 is characterized for operation from 0°C to 70°C.