The RE46C190 is not recommended for new designs. 
Please contact Marketing for information on the RE46C191

The RE46C190 is a low voltage, low current programmable photoelectric smoke detector IC. This circuit will provide all the required features for a photoelectric smoke detector with minimal external components. Programmable setup, calibration and feature selection are the key to reduced component count and reduced manufacturing costs. The boost regulator insures proper operation of the infrared diode and the piezo horn under low battery conditions. The RE46C190 was designed for use in smoke detectors that comply with Underwriters Laboratory Specification UL217 and UL268.

  Two AA battery Operation

  Low Quiescent Current Consumption

  Internal IRED driver with Programmable IRED Current

  Programmable Photo Amplifier

  Programmable Smoke Sensitivity Levels

  9 Minute Timer for Reduced Sensitivity Operation

  Chamber Test with Programmable Sensitivity Level

  Internal Low Battery Test with Programmable Threshold

  Interconnect up to 40 Detectors

  Local Alarm Memory

  Temporal or Continuous Horn Pattern

  All internal Oscillator

  Internal Power On Reset

  Available 16L N SOIC