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4X4 Matrix Membrane Keypad

View 27899: 4X4 Matrix Membrane Keypad Ultra-Thin Design (Switches)

27899: 4X4 Matrix Membrane Keypad Ultra-Thin Design (Switches)

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Parallax Inc.
Jameco Part no. 2161473
Manufacturer PARALLAX INC.
Manufacturer no. 27899
Catalog 151 , page 75
Pricing & Availability


# of Unit Price
1+ $10.95
10+ $9.95
100+ $8.95
250+ $7.95
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4x4 Matrix Membrane Keypad

This 16-button keypad provides a useful human interface component for microcontroller projects. There is convenient adhesive backing to provide a simple way to mount the keypad in a variety of applications.


  • Ultra-thin design
  • Adhesive backing
  • Excellent price/performance ratio
  • Easy interface to any microcontroller
  • Example programs provided for the BASIC Stamp 2 and Propeller P8X32A microcontrollers

    Application Ideas

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

    Key Specifications

  • Maximum Rating: 24 VDC, 30 mA
  • Interface: 8-pin access to 4x4 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)

    Downloads & Resources

    Matrix Keypad Propeller Code
    Matrix Keypad BASIC Stamp Code
    Membrane Keypad Documentation

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  • Specification Value
    Number of Keys16 Key
    Maximum Current Rating30mA@12VDC
    Layout4x4 Key
    Specification Value
    Product Length2.7
    Product Height3

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