Datasheet Microchip RE46C168 — Даташит

RE46C165/6/7/8
CMOS Photoelectric Smoke Detector ASIC
with Interconnect, Timer Mode and Alarm Memory
Features Description Temporal Horn Pattern or Continuous Tone Alarm Memory Sensitivity Control Times:
-9 minutes (RE46C165/6)
-1.2 minutes (RE46C167/8) I/O Filter and Charge Dump Interconnect up to 40 Detectors Internal Power-on Reset (POR) >2000V ESD Protection (HBM) on All Pins Low Quiescent Current Consumption (<8 ВµA) Internal Low Battery Detection and Chamber Test RoHS Compliant Lead-Free Packaging The RE46C165/6/7/8 devices are low-power, CMOS
photoelectric type, smoke detector ICs. With minimal
external components, these circuits will provide all the
required features for a photoelectric type smoke
detector.
Each design incorporates a gain-selectable photo
amplifier for use with an infrared emitter/detector pair.
An internal oscillator strobes power to the smoke
detection circuitry for 100 Вµs, every 10 seconds, to
keep standby current to a minimum. If smoke is
sensed, the detection rate is increased to verify an
alarm condition. A High-Gain mode is available for
push button chamber testing.
A check for a low battery condition and chamber
integrity is performed every 43 seconds when in
standby. The temporal horn pattern supports the
NFPA 72 emergency evacuation signal.
An interconnect pin allows multiple detectors to be …