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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.

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PartNumber	DeviceWeight	ShippingWeight	LeadCount	PackageType	PackageWidth	SolderComposition	JEDECIndicator	RoHS	ChinaEFUP
RE46C168E16F	1.112700	1.833333	16	PDIP	.300in	Matte Tin	e3
RE46C168S16TF	0.157400	0.307692	16	SOIC	.150in	Matte Tin	e3
RE46C168S16F	0.157400	0.300000	16	SOIC	.150in	Matte Tin	e3
RE46C168SW16TF	0.438000	0.800000	16	SOIC	.300 In	Matte Tin	e3
RE46C168SW16F	0.438000	0.765957	16	SOIC	.300 In	Matte Tin	e3