SN74ALS641A-1DB

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS641A-1DB is an octal bus transceiver in the ALS logic series, housed in a 20-pin Small Outline (DW) package. It facilitates asynchronous two-way communication between data buses with true output polarity. The device features a direction-control input to manage data flow and an output-enable input for isolation. The -1 suffix indicates an increased recommended maximum low-level output current of 48 mA. Operating conditions range from 0°C to 70°C with a supply voltage of 4.5 V to 5.5 V.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Bidirectional octal bus transceiver designed for asynchronous two-way communication
• Direction control manages data transmission between A and B buses
• Output enable isolates buses when disabled
• -1 version supports increased low-level output current

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous data bus communication systems
• High-density digital circuit designs requiring bidirectional data transfer
• Bus isolation applications in microprocessor-based systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'DB' against official Texas Instruments documentation, as standard datasheets list 'DW' for SOIC packages. Confirm RoHS compliance and lead finish details via the Package Option Addendum. Ensure the component status matches project requirements, as some variants may be obsolete.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this variant for applications requiring true logic polarity and high-density surface-mount integration. The -1 designation provides higher drive capability compared to standard versions. Verify that the 20-pin SOIC footprint aligns with the PCB layout constraints and thermal management requirements of the target design.

Buffers, Drivers, Receivers, Transceivers Part Context

This component belongs to the Texas Instruments SN74ALS641A family of octal bus transceivers. It shares functional similarities with the SN74ALS642A but differs in output polarity. The device is part of the broader 74ALS logic series, offering improved speed and power consumption characteristics over earlier generations.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS641A-1DWR is listed as an active production alternative in the same SOIC package.