SN74ALS640BNSRG4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640BNSRG4 is an octal bus transceiver from the Texas Instruments SN74ALS series, housed in a 20-pin TSSOP package. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device supports TTL input and output levels, with a propagation delay of 11 ns. It provides a low-level output current of 24 mA and a high-level output current of -15 mA. The component functions as an inverting transceiver and is rated for operation between 0°C and +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight independent bidirectional data paths
• Three-state outputs enable direct connection to system buses without additional drivers
• TTL-compatible input and output logic levels ensure interface compatibility

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data acquisition systems
• Memory mapping applications
• Control circuits requiring bidirectional data transfer

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix NSRG4 to confirm the TSSOP-20 surface-mount package variant. Ensure the ordering code matches the required RoHS compliance status and tape-and-reel packaging format. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and current production status before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an octal bus transceiver with ALS speed characteristics is required in a surface-mount form factor. Compare pinout compatibility with existing PCB layouts designed for standard 20-pin packages. Evaluate the 11 ns propagation delay against system timing requirements to ensure signal integrity is maintained during high-speed data transfers across the bus architecture.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74ALS640 family of octal bus transceivers. It serves as a surface-mount alternative to through-hole DIP variants like the SN74ALS640BN. The component integrates eight bidirectional buffers into a single integrated circuit, facilitating efficient data routing in digital logic designs that require compact footprint solutions.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS640BNE4 (DIP-20 variant)

Buffers, Drivers, Receivers, Transceivers FAQ

What is the logic polarity of the SN74ALS640BNSRG4?

The device is an inverting bus transceiver.

Does the SN74ALS640BNSRG4 support TTL logic levels?

Yes, it accepts TTL input levels and drives TTL output levels.