SN74ALS638A-1N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74ALS638A-1N is an octal bus transceiver from the Texas Instruments ALS logic family, housed in a 20-pin PDIP package. It features three-state outputs and operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a propagation delay of 30 ns, with low-level output current capability of 24 mA and high-level output current of -15 mA. Designed for through-hole mounting, it supports TTL input and output levels and functions as an inverting transceiver across eight channels.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal bus transceiver architecture providing bidirectional data transfer across eight independent channels
• Three-state output configuration enabling direct connection to system buses without additional drivers
• Inverting polarity functionality for signal phase alignment in digital circuits

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional data bus buffering in microprocessor-based systems
• I/O port expansion for digital control interfaces
• Memory interface buffering between processors and storage devices

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix '1N' against official datasheets to confirm pinout and electrical characteristics match project requirements. Ensure compatibility with existing PCB footprints and thermal management strategies. Confirm RoHS compliance status through manufacturer documentation before integration into regulated assemblies.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring high-speed octal data transfer with inverting logic. The ALS series offers improved speed-power product compared to standard TTL. Verify that the 24 mA sink current meets load requirements and that the 30 ns delay fits timing constraints.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74ALS638A series of octal bus transceivers. It is part of the broader Texas Instruments 74ALS logic family, which provides advanced low-power Schottky performance. The device serves as a standard interface solution for parallel data transmission in legacy and industrial digital electronics.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74ALS638AN is a verified equivalent offering identical electrical specifications and pinout configuration.