RE46C121 Series

Temporal Horn Pattern, Detector Interconnect, Low Battery Detect

Catalog

Temporal Horn Pattern, Detector Interconnect, Low Battery Detect

Part	Supplier Device Package	Package / Case	Package / Case	Package / Case	Input Type	Mounting Type	Current - Supply	Type	Operating Temperature [Min]	Operating Temperature [Max]
Microchip Technology RE46C121E16F	16-PDIP	0.3 in	16-DIP	7.62 mm	Ionization	Through Hole	9 µA	Smoke Detector	-10 °C	60 °C

Catalog

Temporal Horn Pattern, Detector Interconnect, Low Battery Detect

Key Features

• * Guard Outputs for Ion Detector Input

• * +/-0.75pA Detect Input Current

• * Internal Reverse Battery Protection

• * Internal Low Battery Detection

• * Low Quiescent Current Consumption (<6.5uA)

• * Available in 16L PDIP or 16L N SOIC

• * ESD Protection on all Pins

• * Interconnect up to 40 Detectors

• * Compatible with MC145018

• * Available in Standard Packaging or RoHS Complaint Pb Free Packaging

Description

The RE46C121 is low power CMOS ionization type smoke detector IC. With few external components this circuit 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 this device was designed for smoke detection utilizing an ionization chamber it can be used in a variety of security applications.