Product Summary

The MC145017P is a Low-Power CMOS Ionization Smoke Detector IC with Temporal Pattern Horn Driver. The MC145017P, when used with an ionization chamber and a small number of external components, will detect smoke. When smoke is sensed, an alarm is sounded via an external piezoelectric transducer and internal drivers. The MC145017P is designed to operate in smoke detector systems that comply with UL217 and UL268 specifications.

Parametrics

MC145017P absolute maximum ratings: (1)DC Supply Voltage, VDD: -0.5 to + 15 V; (2)Input Voltage, All Inputs Except Pin 8 Vin: -0.25 to VDD +0.25 V; (3)DC Current Drain per Input Pin, Except Pin 15 = 1 mA, I: 10 mA; (4)DC Current Drain per Output Pin, I: 30 mA; (5)Operating Temperature Range, TA: -10 to +60℃; (6)Storage Temperature Range, Tstg: -55 to +125℃; (7)Reverse Battery Time, tRB: 5.0 s.

Features

MC145017P features: (1)Ionization Type with On-Chip FET Input Comparator; (2)Piezoelectric Horn Driver; (3)Guard Outputs on Both Sides of Detect Input; (4)Input-Production Diodes on the Detect Input; (5)Low-Battery Trip Point, Internally Set, can be Altered Via External Resistor; (6)Detect Threshold, Internally Set, can be Altered Via External Resistor; (7)Pulse Testing for Low Battery Uses LED for Battery Loading; (8)Comparator Outputs for Detect and Low Battery; (9)Internal Reverse Battery Protection; (10)Supports NFPA 72, ANSi 53.41, and ISO 8201 Audible Emergency Evacuation Signals.

Diagrams

MC145017P block diagram

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