SN54ACT7811
1024 × 18
CLOCKED FIRST-IN, FIRST-OUT MEMORY

SGAS001B - FEBRUARY 1995 - REVISED MARCH 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
• Input-Ready, Output-Ready, and Half-Full Flags
• Cascadable in Word Width and/or Word Depth
• Fast Access Times of 20ns With a 50-pF Load
• High Output Drive for Direct Bus Interface
• Package Options Include 68-Pin Ceramic PGA (GB) or Space-Saving 68-Pin Ceramic Quad Flatpack (HV)

  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 SN54ACT7811 is a 1024 × 18-bit FIFO for high speed and fast access times. It processes data at rates up to 28.5 MHz and access times of 20 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 SN54ACT7811 has normal input-bus-to-output-bus asynchronous operation. The special enable circuitry adds the ability to synchronize independent read and write (interrupts, requests) to their respective system clock.

The SN54ACT7811 is characterized for operation from -55°C to 125°C.