4x4 Matrix Keypad
Availability
In stock
4x4 matrix keypad with 16 numeric-style buttons, scanned over 8 pins via row/column matrix.
4x4 matrix keypad with 16 numeric-style buttons, scanned over 8 pins via row/column matrix.
Row 1 output — driven HIGH/LOW by MCU to scan rows
Row 2 output
Row 3 output
Row 4 output
Column 1 input — read by MCU; internal pull-up enabled
Column 2 input
Column 3 input
Column 4 input
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| R1 | digital | Row 1 output — driven HIGH/LOW by MCU to scan rows | ||
| R2 | digital | Row 2 output | ||
| R3 | digital | Row 3 output | ||
| R4 | digital | Row 4 output | ||
| C1 | digital | Column 1 input — read by MCU; internal pull-up enabled | ||
| C2 | digital | Column 2 input | ||
| C3 | digital | Column 3 input | ||
| C4 | digital | Column 4 input |
I2C · Analog · USB · 3.3 – 5 V · Breakout
Some modules need I2C or signal pull-ups — check the datasheet.
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