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4x4 Membrane Switch Matrix Keyboard Module (A, B, C) Grey/Orange

Matrix Keyboard is a kind of keyboard with a matrix layout, it’s used as peripheral equipment for MCU.

The structure of the matrix keyboard is more complex than that of other common keyboards, and the condition is similar to that of the recognition. The column line is connected with the anode of the power supply through resistors and lets the I/O port of the MCU connected with the row line work as an output terminal.

The I/O port connected with the column line will be the input. Because during the circuit design, there is much more need for external input.

A matrix keyboard minimises the amount of needed I/O. The most common types are 4*4 and 8*8. The 4*4 however, is more popular overall.


  • Product Name: Membrane Switch
  • Key Type: 4x4
  • Voltage DC: 12V
  • Current: 30mA
  • Contact Resistance: >=100 Ohm
  • Force: 250-350g
  • Contact Bounce: >1s
  • Pad Size: 76 x 69 x 0.8mm/3'' x 2.7'' x 0.03''(L*W*T)
  • Cable Length: 72mm/2.8''
  • Connector Pitch: 2.54mm/0.1''
  • Weight: 9g


  • 1 x 4x4 Membrane Switch Matrix Keyboard Module (A, B, C) Grey/Orange

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