SN74LS646DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS646DWR is an octal bus transceiver and register manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features TTL-compatible input and output levels. The device provides tri-state outputs with a low-level output current of 24 mA and a high-level output current of -8 mA. It exhibits a propagation delay of 30 ns and functions at temperatures between -40°C and +85°C. Packaged in a 24-SOIC format, it supports non-inverting data transfer for digital circuit applications.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrates octal bus transceiver functionality with built-in register capability for data storage
• Provides tri-state outputs to facilitate efficient bus management and signal isolation
• Ensures compatibility with standard TTL logic families through specified input and output levels

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data transfer systems requiring buffered communication
• Digital circuits utilizing parallel bus architectures
• Memory interface modules needing registered data paths

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix DWR indicates tape and reel packaging when sourcing components. Confirm that the SN74LS646 designation aligns with legacy LS logic requirements rather than newer ABT or LVC technologies. Ensure the operating environment remains within the specified temperature and voltage limits for reliable performance.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring both buffering and registration in an octal configuration. Compare against SN74ABT646 variants if lower power consumption or wider voltage ranges are necessary. Evaluate package constraints to ensure the 24-SOIC footprint fits the target PCB layout without compromising thermal dissipation.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74LS646 family of octal bus transceivers and registers from Texas Instruments. It serves as a bridge between different digital logic domains, offering high drive capability for bus lines. The device is distinct from similar models like the SN74HC645 by its specific LS logic characteristics and voltage specifications.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The SN74ABT646DWR is a documented substitute within the same manufacturer lineup, offering improved speed and lower power consumption while maintaining functional compatibility.