RE46C122

Features:

• Guard Outputs for Ion Detector Input
• +/-0.75pA Detect Input Current
• Internal Reverse Battery Protection
• Low Quiescent Current Consumption (<6uA)
• Available in 16L PDIP or 16L N SOIC
• ESD Protection on all Pins
• Internal Low Battery Detection
• Interconnect up to 40 Detectors
• 10 Minute Timer for Sensitivity Control
• Compatible with Allegro A5367




Pinout






Specifications

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

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

PARAMETER	SYMBOL	VALUE	UNIT
Supply Voltage	VDD	15	V
Input Voltage Range Except FEED	Vin	-.3 to Vdd +.3	V
FEED Input Voltage Range	Vinfd	-10 to +22	V
Reverse Battery Time	TRB	5	S
Input Current except FEED	Iin	10	mA
Operating Temperature	TA	-10 to 60
Storage Temperature	TSTG	-55 to 125
Maximum Junction Temperature	TJ	150

Description

The RE46C122 is low power CMOS ionization type smoke detector IC. With few external components this circuit RE46C122 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 of RE46C122 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 allows for a separate button to be used for reduced sensitivity mode. Although this device was designed for smoke detection utilizing an ionization chamber it could be used in a variety of security applications. The RE46C122 was designed for use in smoke detectors that comply with Und