Ionization Smoke Detector IC with Interconnect

Overview

The MC14568, 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. This circuit is designed to operate in smoke detector systems that comply with UL217 and UL268 specifications.

Archived content is no longer updated and is made available for historical reference only.

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Features

Ionization Type with On–Chip FET Input Comparator
Piezoelectric Horn Driver
Guard Outputs on Both Sides of Detect Input
Input–Production Diodes on the Detect Input
Low–Battery Trip Point, Internally Set, can be Altered Via External Resistor
Detect Threshold, Internally Set, can be Altered Via External Resistor
Pulse Testing for Low Battery Uses LED for Battery Loading
Comparator Output for Detect
Internal Reverse Battery Protection
Strobe Output for External Trim Resistors
I/O Pin Allows Up to 40 Units to be Connected for Common Signaling
Power–On Reset Prevents False Alarms on Battery Change

MoreLess

Features

Ionization Type with On–Chip FET Input Comparator
Piezoelectric Horn Driver
Guard Outputs on Both Sides of Detect Input
Input–Production Diodes on the Detect Input
Low–Battery Trip Point, Internally Set, can be Altered Via External Resistor
Detect Threshold, Internally Set, can be Altered Via External Resistor
Pulse Testing for Low Battery Uses LED for Battery Loading
Comparator Output for Detect
Internal Reverse Battery Protection
Strobe Output for External Trim Resistors
I/O Pin Allows Up to 40 Units to be Connected for Common Signaling
Power–On Reset Prevents False Alarms on Battery Change

Data Sheets

MC14568: Ionization Smoke Detector IC with Interconnect ARCHIVED

Overview

Features

Features