RE46C168

The RE46C168 device is a 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. 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 µs 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. A continuous tone horn pattern is used for the alarm condition. An interconnect pin allows multiple detectors to be connected so when one unit alarms, all units will sound. A charge dump feature will quickly discharge the interconnect line when exiting a local alarm. An internal 1.2 minute timer allows for single button, push-to-test to be used for a reduced sensitivity mode. An alarm memory feature allows the user to determine if the unit has previously entered a local alarm condition. Utilizing low-power CMOS technology, the RE46C168 was designed for use in smoke detectors that comply with Underwriters Laboratory Specification UL217 and UL268.

Features
  • Continuous Tone Pattern
  • Alarm Memory
  • Sensitivity Control Times: 1.2 minutes
  • I/O Filter and Charge Dump
  • Interconnect up to 40 Detectors
  • Internal Power-on Reset
  • >2000V ESD Protection (HBM) on All Pins
  • Low Quiescent Current Consumption (<8 µA)
  • Internal Low Battery Detection and Chamber Test
  • RoHS Compliant Lead-Free Packaging
Parameter
Parameter Name Value Value
Type Photoelectric Photoelectric
Horn Driver Alarm Pattern Continuous Tone Continuous Tone
Low Battery Detect True True
Alarm Interconnect True True
Sensitivty Timer True True
Alternate Diagnostics Mode True True
Chamber Test True True
Internal POR True True
Operating Temperature Range (C) -25C to 75C -25C to 75C
Documents
RE46C165/6/7/8 Data SheetData Sheets03/29/2016537KB
Analog & Interface Product Selector GuideProduct Line Card03/21/20164116KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
RE46C168E16F16PDIP-25C to +75CTUBE1.231.020.930.900.89
RE46C168S16F16SOIC-25C to +75CTUBE0.990.830.750.730.72
RE46C168S16TF16SOIC-25C to +75CT/R0.990.830.750.730.72
Similar Devices
ProductHorn Driver Alarm PatternPrice5K
RE46C120NFPA Temporal or Continuous Tone$0.54
RE46C121NFPA Temporal$0.54
RE46C122NFPA Temporal$0.57
RE46C126Continuous Tone$0.54
RE46C127Continuous Tone$0.57
RE46C129Continuous Tone$0.57
RE46C140NFPA Temporal$0.60
RE46C141NFPA Temporal$0.60
RE46C143Continuous Tone$0.60
RE46C144Continuous Tone$0.60
RE46C145NFPA Temporal$0.76
RE46C152NFPA Temporal or Continuous Tone$0.54
RE46C162NFPA Temporal or Continuous Tone$0.89
RE46C163NFPA Temporal or Continuous Tone$0.89
RE46C165NFPA Temporal$0.71
RE46C166Continuous Tone$0.71
RE46C167NFPA Temporal$0.71
RE46C168Continuous Tone$0.72
RE46C180NFPA Temporal or Continuous Tone$0.83
RE46C190NFPA Temporal or Continuous Tone$0.94
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
RE46C168E16F1.1127001.83333316PDIP.300inMatte Tine3
RE46C168S16TF0.1574000.30769216SOIC.150inMatte Tine3
RE46C168S16F0.1574000.30000016SOIC.150inMatte Tine3
RE46C165/6/7/8 Data Sheet RE46C168
Analog & Interface Product Selector Guide ENC624J600
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