SN74LS640DWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS640DWR is an octal bus transceiver from the Texas Instruments SN54LS/74LS series. It features eight bidirectional data paths with three-state outputs and operates within a supply voltage range of 4.75V to 5.25V. The device utilizes a 20-pin Small Outline Integrated Circuit (SOIC) package designated as DW. It supports a wide operating temperature range from 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides eight independent bidirectional data transmission channels
• Features three-state outputs for direct system bus interconnection
• Includes direction control functionality for data flow management

Buffers, Drivers, Receivers, Transceivers Applications

• Memory module data bus interfacing
• Microprocessor-based system architecture connections
• Control signal routing in industrial automation systems

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the specific orderable part number matches the required package type and lead finish specifications. Confirm compliance with RoHS directives and moisture sensitivity level ratings before integration into manufacturing processes. Ensure the component status aligns with long-term production availability requirements.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing standard TTL logic circuits requiring high-speed octal data transfer. Consider the LS logic family characteristics regarding power consumption and noise immunity relative to other available logic families. Evaluate the SOIC package dimensions against existing printed circuit board layout constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the broader SN54LS/74LS octal bus transceiver product line, which includes variants such as the SN74LS641, SN74LS642, and SN74LS645. These components share similar functional architectures but differ in output configurations or inversion properties. The SN74LS640 specifically provides non-inverting data transmission capabilities.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS640DW

Buffers, Drivers, Receivers, Transceivers FAQ

What is the primary function of the direction control pin?

The direction control pin determines the data flow direction between the A and B ports, enabling bidirectional communication.

Does the SN74LS640DWR support inverting logic?

No, the SN74LS640 is a non-inverting bus transceiver, unlike the SN74LS641 which provides inverting functionality.