RE46C121

Specifications

Parameter NameValueTypeIonizationHorn Driver Alarm PatternNFPA TemporalLow Battery DetectTrueReverse Battery ProtectionTrueAlarm InterconnectTrueSensitivty TimerFalsePowerup Low BatteryFalseOperating Temperature Range (C)-10C to 60C

Parameter Name	Value
Type	Ionization
Horn Driver Alarm Pattern	NFPA Temporal
Low Battery Detect	True
Reverse Battery Protection	True
Alarm Interconnect	True
Sensitivty Timer	False
Powerup Low Battery	False
Operating Temperature Range (C)	-10C to 60C

Description

The RE46C121 is low power CMOS ionization type smoke detector IC. With few external components this circuit RE46C121 will provide all the required features for an ionization type smoke detector. An internal oscillator strobes power to the smoke detection circuitry for 10.5mS 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 temporal horn pattern supports the NFPA 72 emergency evacuation signal. An interconnect pin allows multiple detectors to be connected such that when one unit alarms all units will sound. Although RE46C121 was designed for smoke detection utilizing an ionization chamber RE46C121 can be used in a variety of security applications. The RE46C121 was designed for use in smoke detectors that comply with Underwriters Laboratory Specification UL217 and UL268.