The SLG4KPDSC-DMO is a keypad scanner demonstration board.

Using an MCU or SoC to scan a keypad is a less than ideal solution for human input. It often makes sense to offload keypad scanning to a dedicated IC to reduce the power and I/O burden on larger, less efficient, and more expensive devices. Using a GreenPAK™ as a keypad scanner provides a flexible, reliable solution that won't kill your power budget or your BOM cost. While GreenPAK with I2C can perform this function, using GreenPAK's Asynchronous State Machine (ASM) unlocks the full potential and enables up to 54 key scanning.

Learn More about GreenPAK Benefits for Keypad Scanning


  • GreenPAK Offers Lots of Flexibility
    • Integrated delays for programmable button de-bounce
    • ASM that can quickly and reliably scan up to 54 buttons in a 20-pin device
    • VDD that is 1.8 to 5.0 V
      • Flexible GPIO routing, ensuring the least complexity in printed circuit board (PCB) routing
  • GreenPAK Lowers Power Consumption
    • Being low powered allows to operate continuously without ruining power budget while the main microcontroller (MCU) or system on chip (SoC) is in standby
  • GreenPAK Enhances System Stability
    • Zero code while implementing features in hardware ensures stability
    • Integration of many components ensuring fewer points of failure



Type Title Date
Application Note PDF 735 KB
Application Note PDF 522 KB
Application Note PDF 237 KB
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Keypad Scanner with GreenPAK