5348

Features:

Interconnect Up to 125 Detectors
Piezoelectric Horn Driver
Guard Outputs for Detector Input
Pulse Testing for Low Battery
Power-ON Reset
Internal Reverse Battery Protection
Internal Timer & Control for Reduced Sensitivity
Built-In Hysteresis Reduces False Triggering



Pinout




Specifications

Supply Voltage Range,
   VDD ................................ -0.5 V to +15 V
Reverse Battery (10.5 V) .................... 20 s
Input Voltage Range,
    VIN ....................... -0.3 V to VDD + 0.3 V
Input Current, IIN ............................ 10 mA
Operating Temperature Range,
   TA ................................... 0°C to +50°C
Storage Temperature Range,
    TS ............................. -55°C to +125°C



Description

The A5348CA is a low-current, 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 an alarm. In addition,special features of A5348CA are incorporated to fa-cilitate alignment and test of the finished smoke detector. This A5348CA is designed to comply with Underwriters Laboratories Specification UL217.


The internal oscillator and timing circuitry of A5348CA keeps standby power to a minimum by powering down the device for 1.66 seconds and sensing smoke for only 10 ms. Every 24 on/off cycles, a check is made for low battery condition. By substituting other types of sensors, or a switch for the ionization detector, this A5348CA very-low power device can be used in numerous other battery-operated safety/security applications.


The A5348CA is supplied in a low-cost, 16-pin dual in-line plastic package. It is rated for continuous operation over the temperature range of 0to +50.