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Smoke Detector, CO Detector and Horn Driver ICs

If you are creating a smoke detector, carbon monoxide (CO) detector or security application, we offer a large portfolio of low-power and cost-effective ICs with a variety of features to meet your design’s requirements. These mix-and-match solutions include low-power ionization and photoelectric smoke detector ICs, CO detector ICs and stand-alone horn driver ICs. Our global technical support team is also available to assist you with your smoke detector design.

Smoke Detector ICs

Our ionization and photoelectric smoke detector ICs are complete solutions for creating a low-cost smoke detector, while our ionization smoke detector front ends can be combined with one of microcontrollers (MCUs) to create a complete design. Whether you are developing an ionization smoke alarm or a photelectric smoke alarm, we offer devices with the following features:

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

We also provide a selection of integrated devices that include these additional features:

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

Complete Your Design with These Related Products

CO Detector ICs

These low-power companion devices provide all the necessary analog, interface, and power management functions to build a microcontroller-based CO or toxic gas detector, including:
  • Power management system
  • Boost regulator
  • High-performance op amp
  • Microcontroller voltage regulator
  • Piezoelectric horn driver
  • LED driver
  • Bidirectional interconnect

Horn Driver ICs

Ranging from simple to more highly integrated solutions, our horn driver ICs can be used to drive piezoelectric horns in safety, security, toys and other applications.

  • SOIC or PDIP package
  • Low-voltage horn driving
  • Low-current, low-power operation
  • Charge pump
  • Power good indicator
  • Boost switcher
  • LDO
  • LED driver
  • Low battery indicator
  • Brownout detection
  • Interconnect for sounding multiple connected units