SN74S138AN

Signal Switches, Multiplexers, Decoders Overview

The SN74S138AN is a Schottky-clamped 3-to-8 line decoder/demultiplexer manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range of 0°C to +70°C. The device features three address inputs and eight active-low outputs, housed in a 16-pin PDIP package with through-hole mounting.

Signal Switches, Multiplexers, Decoders Feature Summary

• Schottky clamping for high-speed performance
• Active-low decoding outputs
• Three address input lines

Signal Switches, Multiplexers, Decoders Applications

• Address decoding
• Demultiplexing
• Memory chip select generation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix against the Package Option Addendum to confirm the exact package type, lead finish, and moisture sensitivity level. Ensure the selected variant matches the required RoHS compliance status and operational temperature range for the target application environment.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when Schottky-clamped speed is required for 3-to-8 line decoding applications. Confirm that the 16-pin PDIP package aligns with the PCB layout constraints and that the 0°C to +70°C commercial temperature range meets the system's thermal requirements.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to the SN74S series of logic devices, characterized by Schottky technology for improved switching speeds compared to standard TTL. It serves as a functional equivalent to other 3-to-8 decoders within the broader 74xx logic family ecosystem.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN74S138AD (SOIC package)