RE46C152E16F

The RE46C152 is a low-power CMOS ionization type smoke detector IC. With few external components, this circuit will provide all the required features for an ionization-type smoke detector
An internal oscillator strobes power to the smoke detection circuitry for 10.5 ms every 1.66 seconds to keep standby current to a minimum. A check for a Low Battery condition is performed every 40 seconds when in Standby. The TONE input allows for selection of a temporal pattern or a two-thirds duty cycle continuous tone. The temporal horn pattern supports the NFPA72 emergency evacuation signal.
An interconnect pin allows multiple detectors to be connected such that when one unit’s alarm goes off, all the other interconnected units will sound
An internal eight-minute timer allows for a separate button to be used for reduced sensitivity mode. Single-button operation for Test and Timer mode is also possible
Although this device was designed for smoke detection utilizing an ionization chamber, it can be used in a variety of other security applications
Utilizing low-power CMOS technology, the RE46C152 was designed for use in smoke detectors that comply with Underwriters Laboratory Specifications UL217 and UL268

• Higher than 1500V Electrostatic Discharge (ESD) Protection (HBM) on all Pins
• Guard Outputs for Ion Detector Input
• ±0.75 pA Detect Input Current
• Internal Reverse Battery Protection
• Low Quiescent Current Consumption (<6.5 µA)
• Internal Low Battery Detection
• Power-Up Low Battery Test
• Interconnect up to 40 Detectors
• Pin-Selectable Horn Patterns
• Eight-Minute Timer for Sensitivity Control
• 16-Lead PDIP Package
• Available in RoHS Compliant Lead-Free Package