SN74ALS640BDW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640BDW is an octal bus transceiver from the Texas Instruments 74ALS series, housed in a 20-pin SOIC 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 with eight channels per circuit.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver architecture providing bidirectional data transfer across eight channels
• Three-state outputs enabling direct connection to system buses without additional drivers
• TTL-compatible input and output logic levels for standard digital interface integration

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data acquisition systems requiring isolated bus interfaces
• Memory mapping circuits utilizing octal data paths
• General-purpose digital signal routing in industrial control environments

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'DW' confirms the SOIC-20 surface-mount package variant rather than other packaging options like DIP or tape-and-reel configurations. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability varies by region. Ensure the ordering part number matches the exact functional requirements regarding voltage and speed specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring high-speed octal data transfer with TTL compatibility. The ALS series offers faster switching speeds compared to standard LS logic while maintaining lower power consumption than older bipolar families. Consider the SOIC-20 footprint constraints and thermal dissipation capabilities during PCB layout planning for dense assembly applications.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments 74ALS (Advanced Low-power Schottky) logic family, known for improved performance over standard 74LS devices. The SN74ALS640B designation indicates the base octal transceiver function, while the 'DW' suffix specifies the plastic small-outline integrated circuit package type suitable for surface-mount technology assembly processes.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS640BDWR serves as a tape-and-reel alternative offering identical electrical characteristics and functionality within the same package family.