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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

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

Smoke Detector, CO Detector and Horn Driver ICs


View All Parametrics
Product Status Automotive Recommended 5K Pricing Horn Driver Alarm Pattern Low Battery Detect Chamber Test Alarm Interconnect Sensitivity Timer Internal POR Alternate Diagnostics Mode Operating Temperature (°C) Operating Voltage (Vdc) Packages
RE46C140 In Production No $0.60 NFPA Temporal Yes Yes Yes Yes Yes No -25 to 75 V to 16/PDIP, 16/PDIP 300mil, 16/SOIC
RE46C141 In Production No $0.60 NFPA Temporal Yes Yes Yes No Yes No -25 to 75 V to 16/PDIP, 16/SOIC
RE46C143 In Production No $0.60 Continuous Tone Yes Yes Yes No Yes No -25 to 75 V to 16/PDIP, 16/SOIC
RE46C144 In Production No $0.60 Continuous Tone Yes Yes Yes Yes Yes No -25 to 75 V to 16/PDIP, 16/PDIP 300mil, 16/SOIC
RE46C145 In Production No $0.76 NFPA Temporal Yes Yes Yes Yes Yes Yes -25 to 75 V to 16/PDIP, 16/SOIC
RE46C165 In Production No Call for pricing NFPA Temporal Yes Yes Yes Yes Yes Yes -25 to 75 6V to 12V 16/PDIP, 16/SOIC
RE46C166 In Production No $0.71 Continuous Tone Yes Yes Yes Yes Yes Yes -25 to 75 6V to 12V 16/PDIP, 16/SOIC
RE46C167 In Production No Call for pricing NFPA Temporal Yes Yes Yes Yes Yes Yes -25 to 75 6V to 12V 16/PDIP, 16/SOIC
RE46C168 In Production No Call for pricing Continuous Tone Yes Yes Yes Yes Yes Yes -25 to 75 6V to 12V 16/PDIP, 16/SOIC
RE46C190 In Production Consider: RE46C191 No $0.94 NFPA Temporal or Continuous Tone Yes Yes Yes Yes Yes No -10 to 60 2V to 5V 16/SOIC
RE46C191 In Production No $0.94 NFPA Temporal or Continuous Tone Yes Yes Yes Yes Yes No -10 to 60 2V to 5V 16/SOIC, 20/SSOP
RE46C194 In Production No $0.88 NFPA Temporal or Continuous Tone Yes Yes Yes Yes Yes No 0 to 60 2V to 5V 16/SOIC
RE46C200 In Production No $0.81 NFPA Temporal or Continuous Tone Yes Yes Yes Yes Yes No -10 to 60 7V to 12V 14/PDIP, 14/SOIC
View All Parametrics
Product Status Automotive Recommended 5K Pricing Horn Driver Alarm Pattern Low Battery Detect Reverse Battery Protection Alarm Interconnect Sensitivity Timer Powerup Low Battery Test Operating Temperature (°C) Packages
RE46C120 In Production No $0.54 NFPA Temporal or Continuous Tone Yes Yes No No No -10 to 60 16/PDIP
RE46C121 In Production No $0.54 NFPA Temporal Yes Yes Yes No No -10 to 60 16/PDIP
RE46C122 In Production No $0.57 NFPA Temporal Yes Yes Yes Yes Yes -10 to 60 16/PDIP
RE46C126 In Production No $0.54 Continuous Tone Yes Yes Yes No No -10 to 60 16/PDIP
RE46C127 In Production No $0.57 Continuous Tone Yes Yes Yes Yes No -10 to 60 16/PDIP
RE46C129 In Production No Call for pricing Continuous Tone Yes Yes Yes No Yes -10 to 60 16/PDIP
RE46C152 In Production No $0.54 NFPA Temporal or Continuous Tone Yes Yes Yes Yes Yes -10 to 60 16/PDIP
RE46C162 In Production No Call for pricing NFPA Temporal or Continuous Tone Yes Yes Yes Yes Yes -10 to 60 16/PDIP
RE46C163 In Production No Call for pricing NFPA Temporal or Continuous Tone Yes Yes Yes Yes Yes -10 to 60 16/PDIP
RE46C180 In Production No $0.83 NFPA Temporal or Continuous Tone Yes No Yes Yes Yes -10 to 60 16/PDIP, 16/SOIC
View All Parametrics
Product Status 5K Pricing Number of Outputs Vpos to Vneg Differential Voltage (V) Min Value Over Voltage Lockout (OVLO) Power GOOD Int/Ext FET Applications Junction Temp. Range (°C) Product type Latch off UNLO Auto Retry FAULT POR No of PWRGD Foldback Current Limit Oja (C/W) Packages
MCP18480 In Production $4.37 1 -0.3 to +15.0 V adjustable threshold adjustable polarity/adjustable delay External 48V Telecom/Datacom Optical Switch Bus/Backplane -40°C to +85°C adjustable threshold 20/PDIP, 20/SSOP
MIC2085 In Production $3.46 Low Voltage (<16V) Yes Yes Yes Yes 112 16/QSOP
MIC2342 In Production $4.80 Compact-PCI/PCI-X/PCI-Express Yes 4 4 76.8 48/TQFP
MIC2582 In Production $2.34 Low Voltage (<16V) Yes Yes 163 8/SOIC
MIC2583 In Production $2.74 Low Voltage (<16V) Yes Yes Yes 1 Active High 112 16/QSOP
MIC2583R In Production $2.74 Low Voltage (<16V) Yes Yes Yes 1 Active High 112 16/QSOP
MIC2584 In Production $4.47 Low Voltage (<16V) Yes Yes Yes 99.1 16/TSSOP
MIC2585-2 In Production Call for pricing Low Voltage (<16V) Yes Yes Yes 2 Active High 83.8 Please call for package information
MIC2587 In Production $2.71 High Voltage (>16V) Yes 1 Active Low Yes 160 8/SOIC
MIC2591B In Production $12.04 Compact-PCI/PCI-X/PCI-Express Yes 2 1 Active Low 56.5 48/TQFP
View All Parametrics
Product Status Automotive Recommended 5K Pricing VDD Range (V) Nominal Boost Voltage(V) Voltage Regulator Brown Out Horn Driver LED Driver Interconnect OP Amp Offset (mV) OP Amp Bandwidth kHz Reference Voltage (mV) Operating Temperature (&deg;C) Packages
RE46C800 In Production No $0.72 2V to 12V 9.8 3.3V Yes Yes Yes Yes 1.00 10.00 300.00 -10 to 60 20/SSOP
RE46C803 In Production No $0.70 2V to 3V 9.7 3.3V No Yes Yes No 1.00 10.00 300.00 -10 to 60 20/SSOP
View All Parametrics
Product Status Automotive Recommended 5K Pricing Operating Voltage (Vdc) LED Driver Voltage Regulator Low Battery Detection Interconnect Power Good Brown Out Charge Pump Inductive Boost Operating Temperature (&deg;C) Packages
RE46C100 In Production No $0.33 6V to 16V No No No No No No No -40 to 85 8/DFN, 8/SOIC, 8/PDIP
RE46C101 In Production No $0.37 6V to 16V Yes No No No No No No 0 to 50 8/PDIP, 8/SOIC
RE46C104 In Production No $0.71 4V to 8V No No No No No Yes No 0 to 50 14/SOIC, 14/PDIP
RE46C105 In Production No $0.71 6V to 12V Yes 3.3V or 5V Yes No No Yes No No -40 to 85 14/SOIC 150mil, 14/PDIP 300mil, 14/SOIC, 14/PDIP
RE46C107 In Production No $0.84 2V to 5V Yes 3V or 3.3V Yes No No Yes No Yes 0 to 50 16/SOIC 150mil, 16/SOIC, 16/PDIP
RE46C108 In Production No $0.60 6V to 12V No 3.3V or 5V No No No Yes No No -40 to 85 8/SOIC, 8/PDIP
RE46C109 In Production No $1.15 6V to 12V No 3V Yes Yes Yes Yes Yes No -40 to 85 16/SOIC, 16/PDIP
RE46C117 In Production No $0.84 2V to 5V No No No No Yes No Yes 0 to 50 8/SOIC, 8/PDIP
RE46C119 In Production No $1.15 6V to 12V No 3V Yes Yes Yes No Yes No -40 to 85 16/SOIC 150mil, 16/SOIC, 16/PDIP
RE46C317 In Production No $0.72 2V to 5V No No No No No No Yes -10 to 60 8/SOIC, 8/PDIP
RE46C318 In Production No $0.72 2V to 5V No No No No No No Yes -10 to 60 8/SOIC, 8/PDIP

Reference Designs


Title Part Number Device Supported
RE46C190 Smoke Detector ADM00344 RE46C190, RE46C191