SN74ALS640BNSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640BNSR is an octal bus transceiver from the Texas Instruments ALS logic family, housed in a 20-pin SOIC surface-mount package. It operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input and output levels. The device features three-state outputs with a propagation delay of 11 ns. It provides a low-level output current of 24 mA and a high-level output current of -15 mA. Designed for commercial use, it functions reliably between 0°C and +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight independent bidirectional data paths
• Three-state outputs enabling direct system bus interconnection without additional drivers
• Inverting polarity for signal direction control

Buffers, Drivers, Receivers, Transceivers Applications

• Memory module data buffering
• Microprocessor-based system data routing
• Control signal distribution in industrial automation

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'NSR' corresponds to the SOIC-20 package and reel packaging format required for your assembly process. Confirm that the ALS logic series meets your power consumption and speed requirements compared to newer alternatives. Ensure compatibility with your board's thermal management capabilities for the specified operating temperature range.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal transceiver with moderate speed and standard TTL compatibility is needed. The ALS series offers a balance between power dissipation and switching speed. Consider the SOIC-20 footprint constraints and ensure the design accommodates the specific pinout and thermal characteristics of this surface-mount package.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS640B family of octal bus transceivers. It serves as a key interface element in digital systems requiring data isolation or level shifting between different functional blocks. The device is part of the broader Texas Instruments logic portfolio designed for general-purpose digital applications.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS640BNE4 is a verified equivalent offering identical electrical specifications in a DIP-20 through-hole package.