SN74LS646DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS646DW is an octal bus transceiver from the Texas Instruments SN74LS series, housed in a 20-pin SOIC package. It operates on a single supply voltage ranging from 4.75 V to 5.25 V. The device features TTL-compatible input and output levels with an inverting polarity configuration. Key electrical specifications include a maximum propagation delay of 25 ns, a low-level output current capability of 24 mA, and a high-level output current of -15 mA. It supports a commercial operating temperature range from 0°C to +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bidirectional data transfer between two buses with direction control
• TTL-compatible logic levels for reliable interfacing
• Inverting signal polarity for specific logic requirements

Buffers, Drivers, Receivers, Transceivers Applications

• Memory module data bus interfaces
• Microprocessor-based system data routing
• Control signal distribution in industrial automation

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the exact suffix against the manufacturer datasheet to confirm package type and temperature grade. Ensure the ordering part number matches the required RoHS compliance status. Confirm that the SOIC-20 footprint aligns with the PCB design constraints before finalizing procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an inverting octal transceiver with TTL compatibility is required. The LS series offers standard drive strength suitable for moderate load conditions. Consider the 25 ns delay for timing-critical paths and ensure the 4.75 V to 5.25 V supply range fits the system power architecture.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74LS64x family of octal bus transceivers. It shares functional similarities with other LS-series logic but is distinct due to its inverting nature and specific pinout configuration within the 20-pin SOIC form factor. It serves as a bridge for parallel data communication in legacy and mixed-signal systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS646DWR is a reel-packaged variant of the same logical function and electrical specifications.