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5368 Dataheets PDF



Part Number 5368
Manufacturers Allegro MicroSystems
Logo Allegro MicroSystems
Description SMOKE DETECTOR WITH INTERCONNECT AND TIMER
Datasheet 5368 Datasheet5368 Datasheet (PDF)

5368 SMOKE DETECTOR WITH INTERCONNECT AND TIMER The A5368CA 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 UL.

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5368 SMOKE DETECTOR WITH INTERCONNECT AND TIMER The A5368CA 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 A5368CA 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. 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 Data Sheet 26110.8* OSC. & TIMING HORN DRIVER Dwg. PC-004 FEATURES s 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 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 CAUTION: CMOS devices have input static protection but are susceptible to damage when exposed to extremely high static electrical charges. 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 Temporal Horn Pattern Always order by complete part number: A5368CA . 5368 SMOKE DETECTOR WITH INTERCONNECT AND TIMER FUNCTIONAL BLOCK DIAGRAM AND TYPICAL APPLICATION + SUPPLY V 6 9V DD I/O 2 V DD FEEDBACK 8 11 HORN 2 + 3 LOW-V SET – + LOGIC 10 HORN 1 5 LED +V SENSITIVITY SET – SUPPLY 9 V SS 14 GUARD 1 +V DETECT. 15 IN 16 GUARD 2 1 TIMER START – + – + 13 POWER-ON RESET TIMING RES. 7 OSCILLATOR & TIMING OSC. CAP. 12 4 TIMER OUT +V Dwg. FC-001B 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1998, Allegro MicroSystems, Inc. 5368 SMOKE DETECTOR WITH INTERCONNECT AND TIMER ELECTRICAL CHARACTERISTICS at TA = +25°C, VDD = 9.0 V, VSS = 0 V, C12 = 0.1 µF, R7 = 8.2 MΩ (unless otherwise noted). Test Characteristic Supply Voltage Range Detector Input Current Input Offset Voltage Pin 6 15 14-15 16-15 15-13 Hysteresis Common Mode Range 13 14-15 13-15 Active Guard Impedance 14 16 Oscillator Period 12 Test Conditions Operating 0 to 40% RH, VIN = 0 to 9.0 V Active Guard Active Guard Detect Comparator No Alarm to Alarm Guard Amplifier Smoke Comparator to VSS to VSS No Alarm Alarm Oscillator Pulse Width Timer Period Low Voltage Threshold Sensitivity Adj. Voltage Horn Output Voltage 4 4 6 13 10-11 After Pin 1 High-to-Low, No Smoke TA = 0 to 50°C V13/V DD, pin 13 open circuit IOUT = 16 mA, VDD = 9.0 V IOUT = 16 mA, VDD = 7.2 V IOUT = -16 mA, V DD = 9.0 V IOUT = -16 mA, V DD = 7.2 V Horn Output ON Time 10-11 Alarm (see figure, time “A”) Low Battery Horn Output OFF Time 10-11 Alarm (see figure, time “B”) Alarm (see figure, time “C”) Low Battery Timer Start Logic Levels 1 VIH VIL Min. 6.0 — — — — 90 2.0 0.5 — — 1.34 32 8.0 8.0 7.2 48.5 — — 8.5 6.3 450 8.0 450 1350 32 4.5 — Limits Typ. 9.0 — — — — 130 — — 10 500 1.67 40 10 10 — 50 0.1 — 8.8 — 500 10 500 1500 40 — — Max. 12 ±1.0 ±100 ±100 ±50 170 VDD - 0.5 VDD - 2.0 — — 2.00 48 12 12 7.8 51.5 0.5 0.9 — — 550 12 550 1650 48 — 2.5 Units V pA mV mV mV mV V V kΩ kΩ s ms ms min V % V V V V ms ms ms ms s V V NOTE 1: NOTE 2: Continued next page . . . Negative current is defined as coming out of (sourcing) the specified device pin. Alarm (Smoke) Condition is defined as V15 < V13; No Alarm (No Smoke) Condition as V15 > V13. 5368 SMOKE DETECTOR WITH INTERCONNECT AND TIMER ELECTRICAL CHARACTERISTICS continued Test Characteristic Timer Start Input Current Timer Out Output Current LED Output ON Current LED Output ON Time LED Output OFF Time Pin 1 4 5 5 5 Test Conditions VIN = 9.0 V VOUT = 0.5 V VDD = 7.2 V, VOUT = 1.0 V No Local Alarm; Not Latched No Alarm, In Standby No Alarm, Timer Mode I/O Current 2 No Alarm, VI/O = VDD - 2.0 V Alarm, VI/O = V DD - 2.0 V Charge Dump, VI/O = 1.0 V I/O Charge Dump Duration I/O Alarm Volt.


5364 5368 5384VA


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