Symbol

74HC138

3-to-8 line decoder/demultiplexer — active-low outputs

⚡ Install this symbol

Paste this into Claude Code (VS Code panel, Adom editor, or terminal) to install:

Search the Adom Wiki for the symbol "74HC138" (slug: sym-74hc138) at https://wiki-ufypy5dpx93o.adom.cloud/wiki/symbols/sym-74hc138. Download the .kicad_sym file from the wiki page's static assets. Add it to my current KiCad project's symbols/ directory and register in sym-lib-table.
Category Logic
Library 74xx
Symbol 74HC138
Pins 16
Package DIP-16 / SOIC-16
Schematic Symbol

AI Skill Technical Reference

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74HC138

Symbol: 74HC138 Library: 74xx Category: Logic Pins: 16 Package: DIP-16 / SOIC-16

Description

The 74HC138 is a 3-to-8 line decoder/demultiplexer. Given a 3-bit address, it drives one of eight outputs low. Essential for address decoding, chip select generation, and display multiplexing. Three enable inputs allow cascading. DIP-16 / SOIC-16.

KiCad Library Reference

This symbol is from the official KiCad 74xx library. Full identifier: 74xx:74HC138

To use in your project:

  1. Open the Symbol Library Manager in KiCad
  2. Search for 74HC138
  3. Place the symbol in your schematic

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0 revisions · KiCad Library: 74xx:74HC138 · Updated 2026-03-02 17:31:36