5348

5348 SMOKE DETECTOR WITH INTERCONNECT AND TIMER 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 are incorporated to facilitate alignment and test of the finished smoke detector. This device is designed to comply with Underwriters Laboratories Specification UL217. The internal oscillator and timing circuitry 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 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 0°C to +50°C. Data Sheet 26110.3 TIMER START I/O LOW-V SET TIMER OUT LED + SUPPLY TIMING RES. FEEDBACK 1 2 3 4 5 6 7 8 V SS V DD LOGIC 16 15 14 13 12 11 10 9 GUARD 2 DETECT. IN GUARD 1 SENSITIVITY SET OSC. CAP. HORN 2 HORN 1 – SUPPLY OSC. & TIMING HORN DRIVER Dwg. PC-004 FEATURES s s s s s s s s ABSOLUTE MAXIMUM RATINGS (Voltages are referenced to VSS ) Supply Voltage Range, VDD ................................ -0.5 V to +15 V Re...