RE46C180E16F - CMOS Programmable Ionization Smoke Detector

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The RE46C180 is a low power, CMOS ionization-type, smoke detector IC. With minimal external components, this circuit will provide all the required features for an ionization-type smoke detector. An on-chip oscillator strobes power to the smoke detection circuitry for 5 ms every 10 seconds to keep the standby current to a minimum. A check for a Low Battery condition is performed every 80s and an ionization chamber test is performed once every 320s when in Standby. The temporal horn pattern complies with the National Fire Protection Association NFPA 72 ® National Fire Alarm and Signaling Code® for emergency evacuation signals. An interconnect pin allows multiple detectors to be connected, such that when one unit alarms, all units will sound. A charge dump feature quickly discharges the interconnect line when exiting a Local Alarm condition. The interconnect input is also digitally filtered. An internal 9 minute or 80s timer can be used for a Reduced Sensitivity mode. An alarm memory feature allows the user to determine whether the unit has previously entered a Local Alarm condition. Utilizing low-power CMOS technology, the RE46C180 is designed for use in smoke detectors that comply with the Standard for Single and Multiple Station Smoke Alarms, UL217 and the Standard for Smoke Detectors for Fire Alarm Systems, UL268.

  • 6 – 12V Operation
  • Low Quiescent Current Consumption
  • Programmable Standby Sensitivity
  • Programmable HUSH Sensitivity
  • Programmable Hysteresis
  • Programmable Chamber Voltage for Push-to-Test (PTT) and Chamber Test
  • Programmable ±150 mV Low Battery Set Point
  • Internal Ionization Chamber Test
  • Internal Low Battery Test
  • Internal Power-On Reset and Power-up Low Battery Test
  • Alarm Memory
  • Auto Alarm Locate
  • Horn Synchronization
  • IO Filter and Charge Dump
  • Smart Interconnect
  • Interconnect up to 40 Detectors
  • ±5% All Internal Oscillator
  • 9 Minute or 80 Second Timer for Sensitivity Control
  • Temporal or Continuous Horn Pattern
  • Guard Outputs for Ion Detector Input
  • ±0.75 pA Detect Input Current
  • 10-year End-of-Life Indication
  • [Datasheet] (https://www.mouser.com/datasheet/2/268/22275A-54807.pdf)

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