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Tca8418 Keypad Matrix And Gpio Expander Breakout
Adafruit
A GPIO expander with keypad matrix driver capabilities, featuring 18 I/O pins over I2C.
In stock
Specifications
2- I2c Address
- 0x34
- Gpio Count
- 18
Pinout
9| Pin | Name | Functions | Notes |
|---|---|---|---|
| VIN | Power | POWER | 3-5VDC input for power conversion to 3.3V. |
| 3Vo | 3.3V Output | GND | Provides up to 100mA of 3.3V output. |
| GND | Ground | GND | Common ground for power and logic. |
| SCL | I2C Clock | I2C | Level shifted to support 3-5V logic. |
| SDA | I2C Data | I2C | Level shifted to support 3-5V logic. |
| INT | Interrupt Output | GPIO | Open-drain active-low interrupt output for keypress events. |
| RST | Reset Input | GPIO | Active-low reset input. |
| C0-C9 | Column Pins (Keypad) | GPIO | 10 column pins for keypad matrix. |
| R0-R7 | Row Pins (Keypad) | GPIO | 8 row pins for keypad matrix. |
Interactive pinout
Highlight:
BOARD
Click a pin to copy its name · tap a tag above to spotlight a bus.