12-Key 4x3 Matrix Switch Keyboard - (AD31824)

Description:

A basic 12-key keypad for user input. The buttons are arranged in a matrix format. This allows a microcontroller to "scan" the 8 output pins to see which of the 12 buttons is being pressed.

Specifications:

- 4x3 matrix arrangement

- Push buttons with numbers 0-9; plus asterisk (*) and number (#) symbols.

- Connector: 7-pin Dupont, 2.54mm pin spacing

- Mounting style: Self-adhesive

- Voltage range: 35VDC@100mA

- Insulation: 100 Mohm, 100V

- Operating temperature -20 to +40°C

Reference link