SN74AS640NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AS640NSR is an octal bus transceiver from the Texas Instruments AS logic series, housed in a 20-pin SOIC package. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device supports an operating temperature range from 0°C to +70°C. Key electrical characteristics include a propagation delay of 10 ns, a low-level output current capability of 32 mA, and a high-level output current of -8 mA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight independent bidirectional data paths
• Three-state outputs for effective bus line driving and isolation
• Inverting logic function for signal direction control

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional data bus architectures
• Memory-to-memory communication interfaces
• Processor-based system interconnects

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'NSR' corresponds to the SOIC-20 surface-mount package and reel packaging format. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor declarations prior to integration into regulated assemblies.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when high-speed bidirectional transfer is required with strong drive capabilities. The AS series offers superior speed compared to standard TTL variants. Ensure the design accommodates the 4.5 V to 5.5 V supply requirement and thermal constraints of the SOIC-20 package.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74AS00 series, representing Advanced Schottky technology. It serves as a high-performance alternative to legacy LS and ALS families, offering faster switching speeds while maintaining compatibility with standard digital logic levels in industrial and commercial environments.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Compatible substitutes include SN74ALS640 variants for slower applications or SN74HC640 for CMOS compatibility. Verify pinout consistency and electrical parameter alignment before substituting.