SN74ALS640B-1DW

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS640B-1DW is an octal bus transceiver from the Texas Instruments ALS logic family, 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. Designed for through-hole or surface-mount applications depending on the specific suffix variant, it functions as an inverting bus transceiver suitable for standard digital logic systems.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration providing eight independent bidirectional data channels
• Three-state outputs enabling direct connection to system buses without additional drivers
• TTL-compatible input and output voltage levels for broad interface compatibility

Buffers, Drivers, Receivers, Transceivers Applications

• High-speed data acquisition systems requiring isolated bus segments
• Memory mapping circuits utilizing address and data bus multiplexing
• Digital signal processing interfaces connecting microprocessors to peripheral devices

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the exact suffix against the manufacturer's official documentation to confirm pinout and electrical characteristics. Suffixes such as 'D' indicate SOIC packaging, while other variations may exist. Ensure the selected part matches the required operating temperature range and voltage specifications for the target application environment before procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring fast switching speeds and high drive capability within standard 5V logic environments. The ALS series offers a balance between power consumption and speed compared to older LS families. Confirm that the PCB layout accommodates the specific package dimensions and thermal requirements associated with the chosen housing type.

Buffers, Drivers, Receivers, Transceivers Part Context

This component belongs to the Texas Instruments SN74ALS640B series of octal bus transceivers. It is part of the broader 74-series logic family, specifically optimized for advanced low-power Schottky performance. The device serves as a critical interface element in digital electronics, facilitating controlled data flow between different circuit blocks.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult the manufacturer's latest datasheet for recommended alternatives or cross-reference guides.