MC14468 - LONIZATION SMOKE DETECTOR IC WITH INTERCONNECT
MOTOROLA SEMICONDUCTOR TECHNICAL DATA Freescale Semiconductor, Inc.
Order this document by MC14468/D MC14468 Low Power CMOS Ionization Smoke Detector IC with Interconnect The MC14468, 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 spec
MC14468 Features
* loaded via a 10 mA pulse for 10 ms. If the LED is not used, it should be replaced with an equivalent resistor such that the battery loading remains at 10 mA. HYSTERESIS When smoke is detected, the resistor/divider network that sets sensitivity is altered to increase sensitivity. This yields approxi
