Limit switch sensing ASIC

(Prototype chips are available for demonstration. Final product version will be ready by Q2/2022.)

The MSW2100 is a 10-channel limit switch sensing device, that reads out the on/off status of limit switches connected to it. The MSW2100 is capable of directly reading out 24 V limit switches without needs of external voltage sensing components. The chip is equipped with an SPI interface for reading out data.

Main features

  • 10 input channels
  • 24-V input compatible
  • SPI interface
  • 3.3 V supply voltage

Key Technical Specifications

  • Chip supply: 1.2 V
  • Switching frequency: 20 kHz
  • SPI clock: 10 MHz
  • Propagation delay: 17 SPI clock cycles
  • Input current: 0.7 mA

Radiation Hardness

  • TID tolerance: >100 Mrad
  • SEL: >100 MeV·cm2/mg
  • SET/SEU: >60 MeV·cm2/mg


  • Industrial automation
  • Remote handling
  • Robotic control

This ASIC is part of a front-end rad-hard BiSS I/O module designed by MAGICS Instruments within Fusion for Energy remote handling activities (F4E-OMF-0633-01-03).