GPIO expander and Keypad Matrix controller - for matrix keypads - TCA8418 - STEMMA QT/Qwiic - Adafruit 4918

Brand: Adafruit
Product Code: AN-21996
Availability: 4-6 business days
Planned delivery date after ordering: 2025-02-14
12.50€
Ex Tax: 10.33€

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The Adafruit module is equipped with the TCA8418 chip working as a matrix keyboard controller. The chip has a total of 18 I/O pins in a 10-column and 8-row arrangement that can be arranged as a matrix of buttons on a total of 80 switches, or you can use any subset as an individual GPIO input or output. The controller has 10 bytes of FIFO to store the 10-element event queue. The Adafruit 4918 module can also be used as a standard GPIO pin expander, which extends the design possibilities by 18 ports.

Specification:
  • Built-in chip: TCA8418
  • Standby (idle) current consumption: 3 μA
  • Supports 80 buttons using 18 GPIO pins
  • Supports QWERTY keyboards and GPIO extensions
  • Supports 1-MHz Fast Mode Plus I2C bus
  • Storage memory: 10 bytes of FIFO
  • Communication interface: I2C bus
  • Interface address: 0x34 (default)
  • Conclusions:
    • solder pads (goldpin 2.54 mm strip is included in the set)
    • STEMMA QT / Qwiic connectors
  • Tile sizes: 35.5 x 17.7 x 4.6 mm
Set includes:
  • GPIO expander and Keypad Matrix controller - for matrix keyboards - TCA8418 - STEMMA QT/Qwiic - Adafruit - 1 pcs
  • 1x16 goldpin strip - 2.54 mm raster - 2 pcs


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