SN74HC640NSR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC640NSR is an octal bus transceiver with 3-state outputs from the HC logic family. It operates within a supply voltage range of 2V to 6V and supports an industrial temperature range of -40°C to +85°C. The device features inverting logic, low input current (1µA max), and high-current outputs capable of driving up to 10 LSTTL loads. Propagation delay is typically 8ns at 5V with a 50pF load.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver architecture with 3-state outputs
• Direction control via DIR pin for bidirectional data flow
• Output isolation capability through OE pin
• CMOS compatible inputs and outputs

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous two-way communication between data buses
• Memory and memory interface systems
• Driving transceivers across multiple busses

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the package type corresponds to SOP (NS) as indicated by the suffix. Confirm the operating temperature range matches the application requirements (-40°C to +85°C). Ensure the supply voltage falls within the 2V to 6V specification. Check for RoHS compliance status if required by environmental regulations.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal bus transceiver with 3-state outputs is needed. Consider the HC series for standard speed and CMOS compatibility. Verify that the 2V to 6V supply voltage range fits the system design. Ensure the -40°C to +85°C temperature range meets operational needs.

Buffers, Drivers, Receivers, Transceivers Part Context

The SN74HC640NSR belongs to the SNx4HC640 family of octal bus transceivers. It is part of Texas Instruments' HC logic series, designed for general-purpose digital applications. The NS package variant offers a small outline form factor suitable for surface mount assembly.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HC640DWR and SN74HC640PWR are alternative packages within the same product family. SN54HC640 variants offer extended military temperature ranges. CD74HC640M is a similar device from the same manufacturer.