SN74LS640-1NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS640-1NSR is an octal bus transceiver from the Texas Instruments SN74LS series. It features inverting logic with three-state outputs and operates within a supply voltage range of 4.75 V to 5.25 V. The device supports TTL input and output levels, providing a low-level output current of 24 mA and a high-level output current of -15 mA. It is housed in a 20-pin Small Outline Package (SOP) and functions across an operating temperature range of 0°C to 70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver architecture supporting bidirectional data communication
• Three-state outputs for effective bus line isolation
• Inverting logic functionality for signal direction control

Buffers, Drivers, Receivers, Transceivers Applications

• Memory module address and data bus driving
• Clock drivers and buffer circuits
• Bidirectional bus architectures requiring signal inversion

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify that the specific ordering suffix matches the required package type and moisture sensitivity level. Confirm RoHS compliance status and lead finish specifications against project requirements. Ensure the component meets the designated operating temperature range and electrical parameters before integration into the final design.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal transceiver with inverting characteristics and three-state outputs is required. It is suitable for applications needing TTL-compatible I/O levels and standard LS-series drive capabilities. Consider alternative non-inverting variants if signal polarity preservation is necessary.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74LS640 family of octal bus transceivers. It shares functional similarities with other members like the SN74LS645 but differs in logic polarity. The device is designed for general-purpose digital systems requiring robust bus interfacing and signal buffering capabilities.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS640NSR serves as a direct pin-compatible replacement within the same family.