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Smoke Detector ICs

Microchip offers a family of low power ionization and photoelectric smoke detector ICs for smoke detector and security applications.

Microchip’s ionization and photoelectric smoke detector IC families provide all the components necessary for ionization or photoelectric type smoke detectors.


  • Low battery detection
  • Reverse battery protection
  • Temporal continuous tone pattern horn driving
  • Low current, low power operation
  • SOIC or PDIP package
  • Interconnect pin

For Selected Detectors

  • Interconnect for sounding multiple connected units
  • Sensitivity timer
  • Internal power on reset
  • Reverse battery protection
  • Diagnostic mode for production calibration

CO Detector ICs

Microchip offers low power CO detector companion ICs for CO detectors and security applications.

Microchip’s CO detector ICs provide all the necessary functions to build a CO or toxic gas detector


  • Power Management System
  • Boost Regulator
  • High Performance Op Amp
  • Microcontroller Voltage Regulator
  • Piezoelectric Horn Driver
  • LED driver
  • Bidirectional Interconnect