A5338 - Allegro MicroSystems

A5338 Smoke Detector

The A5338 is a low-current CMOS circuit providing all of the required features for an ionization-type smoke detector. Oscillator. An internal oscillator operates with a period of 1.67 s during no-smoke conditions. Every 1.67 s, internal power is applied to the entire circuit and a check is made for smoke. Every 24 oscillator cycles (40 s total), the LED is p.

Features

for an ionizationtype smoke detector. A networking capability allows as many as 125 units to be interconnected so that if any unit senses smoke, all units will sound an alarm. Approximate Scale 1:1 In addition, special features are incorporated to facilitate alignment and test of the finished smoke detector. This device is designed to comply with Underwriters Laboratories Specification UL217. Features The internal oscillator and timing circuitry keeps standby power to a minimum by powering down the Interconnect up to 125 detectors device for 1.66 seconds and sensing smoke for only Piezoelectri.