Membrane Keypad (4×4)


This high quality 4×4 Keypad Matrix lets you quickly add controls to your electronics project. It offers 0-9 numerals, A-D letters, and standard star(*) and hash(#) symbols. Buttons have a very tactile actuation. Output is sensed through a flexible 3 inch ribbon cable with an 8 pin female header. This means you can get 16 inputs through 8 pins. The keypad also has an adhesive backing so you can quickly mount it anywhere you want.

10 in stock

SKU: 0020 Category: Tags: , ,


This 16-button keypad provides a useful human interface component for microcontroller projects. Convenient adhesive backing provides a simple way to mount the keypad in a variety of applications. The Keypad 4×4 features a total of 16 buttons in Matrix form. This is a membrane keypad with no moving parts. It has a nice overlay depicting a telephone type keypad with additional four functional buttons. A female 8-pin berg connector is provided for interfacing it with your microcontroller circuits.


  • Ultra-thin design
  • Adhesive backing
  • Excellent price/performance ratio
  • Easy interface to any microcontroller

Application Ideas

  • Security systems
  • Menu selection
  • Data entry for embedded systems

Key Specifications

  • Maximum Rating: 24 VDC, 30 mA
  • Interface: 8-pin access to 4×4 matrix
  • Operating temperature: 32 to 122 °F (0 to 50°C)
  • Dimensions: Keypad, 2.7 x 3.0 in (6.9 x 7.6 cm)


  • Cable Length: 3-1/3″ or 85mm (include connector)
  • Weight: 8g
  • Connector: Dupont 8 pins, 0.1″ (2.54mm) Pitch
  • Mount Style: Self-Adherence
  • Max. Circuit Rating: 24VDC, 30mA
  • Insulation Spec.: 100M Ohm, 100V
  • Dielectric Withstand: 250VRms (60Hz, 1min)
  • Contact Bounce: <=5ms
  • Life Expectancy: 1 million closures
  • Operation Temperature: -20 to +40 °C

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 below.


Tutorial at

Tutorial at


Video Tutorial


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