RE46C140

www.DataSheet4U.com R&E International RE46C140 CMOS Photoelectric Smoke Detector ASIC with Interconnect and Timer Mode Product Specification General Description The RE46C140 is low power CMOS photoelectric type smoke detector IC. With minimal external components this circuit will provide all the required features for a photoelectric type smoke detector. The 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 100us 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 connected such that when one units alarms, all units will sound. An internal 10 minute timer can be used for a reduced sensitivity mode. Utilizing low power CMOS technology the RE46C140 was designed for use in smoke detectors that comply with Underwriters Laboratory Specification UL217 and UL268. Features Internal Power On Reset Low Quiescent Current Consumption Available in 16L PDIP or 16L N SOIC ESD Protection on all Pins Interconnect up to 40 Detectors 10 Minute Timer for Sensitivity Control Tem...