SN74LS640DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS640DW is an octal bus transceiver from the Texas Instruments SN54LS/74LS series. It features a 20-pin Small Outline Integrated Circuit (SOIC) package with a width of 7.5 mm and a maximum height of 2.65 mm. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports a functional temperature range of 0°C to 70°C. It provides bidirectional data transmission across eight channels with inverting logic polarity.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides bidirectional data transmission for eight independent channels
• Features three-state outputs that isolate the bus when disabled
• Includes direction control functionality to manage signal flow

Buffers, Drivers, Receivers, Transceivers Applications

• Memory module data bus interfacing
• Microprocessor system bus architectures
• Control signal routing in digital logic circuits

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm the SOIC-20 package dimensions match standard JEDEC outlines. Ensure the operating temperature range aligns with your application requirements, as this specific variant is rated for commercial temperatures only.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring high-density octal bus interfaces. Verify that the TTL input levels are compatible with your driving logic sources. Consider the propagation delay characteristics relative to your system clock speeds to ensure timing margins are met during bidirectional transfers.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN54LS/74LS family of octal bus transceivers. It shares the same logical architecture as the SN74LS641, SN74LS642, SN74LS644, and SN74LS645, differing primarily in output stage configurations such as open-collector or standard three-state designs.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS640DWR