SN74ALS642A-1DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS642A-1DWR is an octal bus transceiver from the Texas Instruments ALS logic family, housed in a 20-pin SOIC package. It provides bidirectional data transfer between two buses with inverting logic. The device features a direction control input to set transmission flow and an output enable input for isolation. The -1 suffix indicates an increased recommended maximum low-level output current of 48 mA when VCC is between 4.75 V and 5.25 V. It operates within a supply voltage range of 4.5 V to 5.5 V and supports temperatures from 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Bidirectional octal bus transceiver with inverting logic
• Direction control input manages data flow between A and B buses
• Output enable input isolates buses when deactivated
• -1 version supports increased low-level output current

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Bus-oriented memory and command decoders
• Digital signal processing systems requiring high drive capability

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the ordering suffix matches the required package type and tape-and-reel specifications. Confirm the -1 designation is necessary for the specific application's current requirements. Check RoHS compliance status and moisture sensitivity level ratings before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when inverting logic is required for bidirectional data transfer. The -1 variant is suitable for applications needing higher low-level sink currents compared to standard versions. Ensure the operating temperature range aligns with the system environment.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS642A series of octal bus transceivers. It shares functional similarities with the non-inverting SN74ALS641A but differs in logic polarity. The device is designed for high-density applications using 20-pin packages.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS642A-1DW is available as a tube-packaged alternative.