A5367 Datasheet | Allegro MicroSystems

FEATURES AND BENEFITS - Low average standby current for long battery life - Interconnect up to 125 detectors - Piezoelectric horn driver - Guard outputs for detector input - Pulse testing for low battery - Power-on reset (POR) - Internal reverse battery protection - Timer (Hush) mode for enabling reduced sensitivity period - Built-in hysteresis reduces false triggering - Temporal horn pattern, per UL217, NFPA72, and ISO8201 - UL Recognized for UL217 or UL268 applications PACKAGE: 16-pin DIP (suffix A): Not to scale DESCRIPTION The A5367 is a low-current, Bi CMOS circuit providing all of the required features for an ionization-type 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 their alarm. In addition, special features are incorporated to facilitate alignment and test of the finished smoke detector. The device is Recognized by Underwriters Laboratories for use in smoke alarms that ply with Standard UL217 or UL268, per file #S2113. The internal oscillator and timing circuitry keep standby power to a minimum by powering down the device for 1.66 seconds and sensing for smoke for only 10 ms. Every 24 on-off cycles, a check is made for a low battery condition. By substituting other types of sensors or a switch for the ionization detector, this very-low- power device can be used in numerous other battery-operated safety/security applications. The A5367 is supplied in a low-cost 16-pin dual in-line plastic package (DIP). It is rated for continuous operation over the temperature range of - 10°C to 60°C. The Pb (lead) free version (suffix - T) has 100% matte tin leadframe plating. Typical Application 50 kΩ To / from other units 9V Timer Mode 200 kΩ 1 TIMER START 16 GUARD2 200 Ω 2 I/O 15 DETECT IN 3 LOW-V SET 14 GUARD1 TIMER OUT SENSITIVITY SET 330 Ω 5 LED 12 OSC CAP 8.2 MΩ 6...