Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout - STEMMA QT / Qwiic

Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout - STEMMA QT / Qwiic

Marsoni

M251S

$10.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Adafruit TCA8418 Keypad Matrix and GPIO Expander Breakout - STEMMA QT / QwiicThe Adafruit TCA8418 is a versatile and powerful I2C GPIO expander and keypad matrix driver. Featuring 18 total I O pins arranged as 10 columns and 8 rows, it supports up to 80 buttons in a matrix configuration, or can be used as individual GPIO inputs or outputs. This chip includes a 10 element event queue for key press and release events, and provides interrupt output on the INT pin. It supports features such as pull ups, debounce filtering, and

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Perfect size for a cup of tea/coffee or a glass of wine on the side Also great for placing a piece of jewelry or anything else you want close by your bedside I like the oval shape better than a rectangle one and the quality of material is top notch, not to speak of how strong it is…a really good buy for us!

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Reviewed in the United States on October 18, 2025