Symbol

PCF8574TS

8-bit I2C I/O expander — quasi-bidirectional ports, interrupt

⚡ Install this symbol

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

Search the Adom Wiki for the symbol "PCF8574TS" (slug: sym-pcf8574) at https://wiki-ufypy5dpx93o.adom.cloud/wiki/symbols/sym-pcf8574. 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 Interface
Library Interface_Expansion
Symbol PCF8574TS
Pins 20
Package SSOP-20
Schematic Symbol

AI Skill Technical Reference

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PCF8574TS

Symbol: PCF8574TS Library: Interface_Expansion Category: Interface Pins: 20 Package: SSOP-20

Description

The PCF8574 from NXP is an 8-bit I/O expander with I2C interface. Quasi-bidirectional I/O ports with interrupt output. Three address pins allow 8 devices (64 I/O) per bus. The standard behind most I2C LCD backpacks (HD44780). SSOP-20.

KiCad Library Reference

This symbol is from the official KiCad Interface_Expansion library. Full identifier: Interface_Expansion:PCF8574TS

To use in your project:

  1. Open the Symbol Library Manager in KiCad
  2. Search for PCF8574TS
  3. Place the symbol in your schematic

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0 revisions · KiCad Library: Interface_Expansion:PCF8574TS · Updated 2026-03-02 17:31:36