AS7C256A-20TCNTR

Overview

The AS7C3256A-20TCNTR is a 256 Kbit (32K x 8) asynchronous static random access memory manufactured by Alliance Memory, Inc. It operates within a voltage range of 3.0 V to 3.6 V and features a 20 ns access time. The device utilizes a parallel interface and is housed in a 28-pin TSOP package. It supports single data rate operations and is rated for industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Asynchronous parallel SRAM architecture with dedicated chip enable, output enable, and write enable control signals.

Applications

• Industrial embedded systems requiring volatile data storage
• Microcontroller cache memory buffers
• Data acquisition system temporary storage

Procurement Notes

Verify the exact part number against official manufacturer documentation, as the suffix 'TR' typically indicates tape and reel packaging while 'CN' denotes commercial temperature range. Confirm that the requested component matches the industrial temperature rating (-40°C to +85°C) specified in the datasheet, as suffix variations may alter operating conditions or packaging type. Ensure compatibility with 3.3V logic levels before procurement.

Selection Notes

Select this component when a 32K x 8 organization is required with 20 ns speed at 3.3V. Compare against the AS7C3256A-15 variant for faster access times if power consumption allows. Verify package compatibility with the 28-TSOP footprint and ensure the design supports the specific humidity sensitivity level defined for this series.

Part Context

This device belongs to the AS7C3256A series of high-speed CMOS static random access memories. It is designed for applications needing fast read/write cycles without complex synchronization interfaces. The series offers low power consumption typical of CMOS technology and is suitable for battery-backed systems where data retention is critical during power loss.

Replacement Considerations

AS7C3256A-15TIN: Faster 15 ns access time, same pinout and organization.