SN74ABT646ADWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ABT646ADWR is an octal bus transceiver and register manufactured by Texas Instruments, belonging to the ABT logic series. It features a BiCMOS process with non-inverting true outputs and three-state capability. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input and output levels. Key electrical parameters include a propagation delay of 7.4 ns, low-level output current of 64 mA, and high-level output current of -32 mA. It functions as an 8-bit registered transceiver in a 24-pin SOIC package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver with integrated registration for data storage
• Three-state outputs for effective bus line driving
• Non-inverting true output polarity
• Compatible with TTL input and output voltage levels

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional data communication on multi-drop buses
• Memory interface circuits requiring registered data latching
• I/O adapters for microprocessor systems
• Bus-oriented memory and command decoding applications

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'ADWR' against the manufacturer's official datasheet to confirm the tape-and-reel packaging configuration and industrial temperature grade. Ensure the component matches the required RoHS compliance status and lead finish specifications defined in the latest production release notes before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal bidirectional bus interface with internal data storage is required. The ABT series offers faster switching speeds compared to standard ALS or LVC families while maintaining compatible voltage levels. Verify that the system design accommodates the specified 7.4 ns propagation delay and the 4.5 V to 5.5 V power supply constraints for reliable operation.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ABT646 family of registered bus transceivers. It serves as a bridge between processors and peripheral devices, allowing data to be captured and held on the bus. The device is distinct from unregistered variants like the SN74ABT240, which lacks internal flip-flops. It is designed for high-performance digital systems requiring precise timing control.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible substitutes include the SN74ABT646DW and SN74ABT646PW. Verify that alternative packages maintain the same SOIC-24 footprint and electrical characteristics. Cross-reference with SN74ABT646APWR if TSSOP packaging is acceptable for the target application.