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Datasheet Microchip RE46C191S16TF

Part NumberRE46C191S16TF

The RE46C191 is a low voltage, low current programmable photoelectric smoke detector IC


  • Download » Datasheet PDF, 950 Kb, Revision: 10-12-2017
    RE46C191 Data Sheet
    Docket ↓
    CMOS Low-Voltage Photoelectric Smoke Detector ASIC
    with Interconnect and Timer Mode
    Features: General Description: The RE46C191 is a low-power, low-voltage CMOS
    photoelectric-type smoke detector IC. With minimal
    external components, this circuit provides all the
    required features for a photoelectric-type smoke
    detector. Two AA Battery Operation
    Low Quiescent Current Consumption
    Local Alarm Memory
    Interconnect up to 40 Detectors
    Nine-Minute Timer for Sensitivity Control
    Temporal or Continuous Horn Pattern
    Internal Low Battery and Chamber Test
    All-Internal Oscillator
    Internal Infrared Emitter Diode (IRED) Driver
    Adjustable IRED Drive Current
    Adjustable Hush Sensitivity
    Two percent Low Battery Set Point
    Pin-for-Pin Compatible with RE46C190 The design incorporates a gain-selectable photo
    amplifier for use with an infrared emitter/detector pair.
    To keep the standby current to a minimum, an internal
    oscillator strobes power to the smoke detection ...



Lifecycle StatusProduction (Appropriate for new designs but newer alternatives may exist)




Alarm InterconnectYes
Alternate Diagnostics ModeNo
Chamber TestYes
Horn Driver Alarm PatternNFPA Temporal or Continuous Tone
Internal PORYes
Low Battery DetectYes
Operating Temperature60 to -10 °C
Operating Temperature Range-10 to +60 °C
Operating Voltage2V to 5V Vdc
Sensitivity TimerYes

Eco Plan


Moldel Line

Series: RE46C191 (2)

Manufacturer's Classification

  • CO and Smoke Detection > CO and Smoke Detector ICs > Photoelectric Smoke Detector ICs
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