RE46C190
CMOS Low Voltage Photoelectric Smoke Detector ASIC
with Interconnect and Timer Mode
Features Description The RE46C190 is a low power, low voltage CMOS
photoelectric type smoke detector IC. With minimal
external components, this circuit will provide all the
required features for a photoelectric-type smoke
detector. Two AA Battery Operation
Internal Power On Reset
Low Quiescent Current Consumption
Available in 16L N SOIC
Local Alarm Memory
Interconnect up to 40 Detectors
9 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
2% Low Battery Set Point The design incorporates a gain-selectable photo
amplifier for use with an infrared emitter/detector pair.
An internal oscillator strobes power to the smoke …