SN74ALS646ADWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS646ADWR is an octal registered bus transceiver from the Texas Instruments ALS logic family. It features eight non-inverting data paths with three-state outputs, designed for high-speed bidirectional data transfer between buses and registers. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input levels. Packaged in a 24-pin SOIC (DW) format, it offers a propagation delay of 30 ns and provides low-level output current of 24 mA and high-level output current of -15 mA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal Registered Bus Transceiver
• Three-State Outputs
• Non-Inverting Data Paths
• TTL Input Levels

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional data transfer between buses and registers
• High-speed memory interface circuits
• Control signal routing in digital systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'DWR' indicates the reel packaging variant distinct from the tube-packaged 'DW'. Confirm the ALS logic series compatibility with existing system designs. Ensure the SOIC-24 footprint matches the target PCB layout. Validate RoHS compliance status through official manufacturer documentation before finalizing procurement specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal width is required for bus interfacing applications. The ALS series offers a balance of speed and power consumption suitable for general-purpose digital logic. Consider the 30 ns propagation delay against system timing requirements. Verify that the 4.5 V to 5.5 V operating range aligns with the available power supply rails in the design.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS646A family of octal bus transceivers. It serves as a registered interface element, allowing data latching during transfer operations. The device is part of the broader Texas Instruments 74-series logic portfolio, specifically utilizing Advanced Low-power Schottky technology for improved performance over standard LS equivalents.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct functional substitutes include other octal registered bus transceivers from the same logic family or compatible variants such as the SN74ALS646ADW. Cross-referencing pinouts and electrical characteristics is essential when considering alternative manufacturers or upgraded logic families.