Adafruit PCF8574 I2C GPIO Expander by Kattni Rembor published August 03, 2022, last edited January 21, 2025 last major update November 08, 2023 posted in Adafruit Products Arduino Compatibles CircuitPython Breakout Boards STEMMA Save New Favorite × Please sign in to include this guide in your list of favorites. You will be redirected back to this guide once you sign in, and can then save this guide as one of your favorites. Download Overview Pinouts Python & CircuitPython Python Docs Arduino Arduino Docs Downloads Single page Feedback? Corrections? Primary Products Your browser does not support the video tag. Adafruit PCF8574 I2C GPIO Expander Breakout $4.95 Add to Cart Featured Products view all Your browser does not support the video tag. Adafruit PCF8574 I2C GPIO Expander Breakout $4.95 Add to Cart STEMMA QT / Qwiic JST SH 4-pin Cable - 100mm Long $0.95 Add to Cart STEMMA QT / Qwiic JST SH 4-Pin Cable - 50mm Long $0.95 Add to Cart 12 Beginner Product guide Downloads Files PCF8574 Datasheet Fritzing object in the Adafruit Fritzing Library EagleCAD PCB files on GitHub Schematic and Fab Print Measurements in inches. Page last edited March 08, 2024 Text editor powered by tinymce. Arduino