Button Switch module

Button Switch module

Matrix Membrane Keypad 16 Key (4x4)

100% of 100

16-button membrane keyboard with interface component for microcontroller projects.

Availability: In stock
  • Buy 5 for $0.58 each and save 2%
  • Buy 15 for $0.57 each and save 3%

Product Overview

16-button membrane keyboard with interface component for microcontroller projects.

Convenient adhesive backing provides a simple way to mount the keypad in a variety of applications.

Application Ideas:

  • security systems;
  • menu selection;
  • data entry for embedded systems.

How it Works

Matrix keypads use a combination of four rows and four columns to provide button states to the host device, typically a microcontroller. Underneath each key is a pushbutton, with one end connected to one row, and the other end connected to one column. These connections are shown here:

16-button membrane keyboard

In order for the microcontroller to determine which button is pressed, it first needs to pull each of the four column s (pins 1-4 ) either low or high one at a time , and then poll the states of the four rows (pins 5-8). Depending on the states of the columns, the microcontroller can tell which button is pressed.

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Maximum Rating 24VDC, 30mA
Lifetime 1 million clicks or more
Reclosing time ≤5ms
Interface 8-pin access to 4×4 matrix
Dimensions keypad 69mm×76mm (2.7in×3.0in)
Dimension Cable 20mm×85mm (0.78in×3.5in)
Operating temp range 0 to 50 °C (32 to 122 °F)