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5358 Dataheets PDF



Part Number 5358
Manufacturers Allegro MicroSystems
Logo Allegro MicroSystems
Description PHOTOELECTRIC SMOKE DETECTOR WITH INTERCONNECT AND TIMER
Datasheet 5358 Datasheet5358 Datasheet (PDF)

5358 PHOTOELECTRIC SMOKE DETECTOR WITH INTERCONNECT AND TIMER The A5358CA is a low-current BiCMOS circuit providing all of the required features for a photoelectric type smoke detector. This device can be used in conjunction with an infrared photoelectric chamber to sense scattered light from smoke particles. Special features are incorporated in the design to facilitate calibration and testing of the finished detector. The device is designed to comply with Underwriters Laboratories Specification.

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5358 PHOTOELECTRIC SMOKE DETECTOR WITH INTERCONNECT AND TIMER The A5358CA is a low-current BiCMOS circuit providing all of the required features for a photoelectric type smoke detector. This device can be used in conjunction with an infrared photoelectric chamber to sense scattered light from smoke particles. Special features are incorporated in the design to facilitate calibration and testing of the finished detector. The device is designed to comply with Underwriters Laboratories Specification UL217 and British Standard BS 5446, Part 1. A variable-gain photo amplifier can be directly interfaced to an infrared emitter/detector pair. The amplifier gain levels are determined by two external capacitors that are then internally selected depending on the operating mode. Low gain is selected during standby and timer modes. During a local alarm this low gain is increased (internally) by ~10% to reduce false triggering. High gain is used during the pushbutton test and during standby to periodically monitor the chamber sensitivity. The internal oscillator and timing circuitry keeps standby power to a minimum by sensing for smoke every 10 seconds in a 10 µs window. A special three-stage speedup sensing scheme is incorporated to minimize the time to an audible alarm and also to reduce false triggering. Also, two consecutive cycles of degraded chamber sensitivity are required for a warning signal to occur. The A5358CA is supplied in a low-cost 16-pin dual in-line plastic package. It is rated for continuous operation over the temperature range of -25°C to +75°C. Data Sheet 26110.10A C1 C2 DETECT STROBE + SUPPLY IRED I/O HORN 1 1 2 3 4 5 6 7 8 HORN DRIVER V DD LOGIC OSC. & TIMING V SS 16 15 14 13 12 11 10 9 TEST HUSH – SUPPLY TIMING RES. OSC. CAP. LED FEEDBACK HORN 2 Dwg. PC-007 ABSOLUTE MAXIMUM RATINGS (Voltages are referenced to VSS) Supply Voltage Range, VDD .................................... -0.5 V to +15 V Input Voltage Range, VIN ............................ -0.3 V to V DD + 0.3 V Input Current, IIN ................................... 10 mA Operating Temperature Range, TA ..................................... -25 °C to +75°C Storage Temperature Range, TS ................................... -55°C to +125°C CAUTION: CMOS devices have input static protection but are susceptible to damage if exposed to extremely high static electrical charges. FEATURES s s s s s s s s Interconnect Up to 50 Detectors Piezoelectric Horn Driver All Internal Low-Battery Detection Power-ON Reset Internal Timer & Control for Reduced Sensitivity Built-In Circuits to Reduce False Triggering 6 V to 12 V Operating Voltage Range ESD-Protection Circuitry on All Pins Always order by complete part number: A5358CA . 5358 PHOTOELECTRIC SMOKE DETECTOR with INTERCONNECT and TIMER FUNCTIONAL BLOCK DIAGRAM + SUPPLY V DD 5 9V BAND-GAP REFERENCE I/O 7 V DD FEEDBACK 10 9 HORN 2 8 HORN 1 LOGIC PHOTO AMP +V LOW BATTERY C1 1 TIMING RES. +V C2 2 4 V DD 6 OSCILLATOR & TIMING STROBE IRED – SUPPLY 14 V SS 15 HUSH 16 TEST Dwg. FC-006 – + DETECT 3 – + POWER-ON RESET 11 LED 13 12 OSC. CAP. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1995, 1996 Allegro MicroSystems, Inc. 5358 PHOTOELECTRIC SMOKE DETECTOR with INTERCONNECT and TIMER DC ELECTRICAL CHARACTERISTICS at TA = -25°C to +75 °C*, VSS = 0 V, in typical application (unless otherwise noted). Characteristic Supply Voltage Range Operating Supply Current Symbol VDD IDD Average Standby Configured per Figure 1 During Strobe ON, IRED OFF, Configured per Figure 1 During Strobe ON, IRED ON, Configured per Figure 1 Low-Level Input Voltage VIL Test Conditions Test Pin 5 5 VDD – 12 Min. 6.0 – Limits Typ. Max. – – 12 12 Units V µA mA 5 12 – – 2.0 5 12 – – 3.0 mA 7 10 16 15 7 10 16 15 VIN = VDD, Strobe Active, Pin 12 @ VDD VIN = VDD 1, 2 9 9 9 9 9 9 9 9 12 – – – – 3.2 6.3 8.5 1.6 – – – – – – – – – – 1.5 2.7 7.0 0.5 – – – – 100 V V V V V V V V nA High-Level Input Voltage VIH Input Leakage High IIH 3, 10, 12 1, 2, 3 12 12 – – – – 100 -100 nA nA Input Leakage Low IIL VIN = VST , Strobe Active, Pin 12 @ VDD VIN = VSS 10, 12 15, 16 12 12 9 9 12 6.5 6.5 6.5 6.5 12 9 – – 0.25 20 – – – – 5.5 VDD - 0.1 VDD - 5.25 – – – – – – – 0.5 – – – -100 -1.0 10 80 140 0.6 1.0 – – – VDD - 4.75 nA µA µA µA µA V V V V V V Input Pull-Down Current IIN VIN = VDD No Local Smoke, VIN = VDD No Local Smoke, VIN = 17 V 16, 15 7 7 11 8, 9 13 8, 9 4 4 Low-Level Output Voltage V OL IO = 10 mA IO = 16 mA IO = 5 mA High-Level Output Voltage Strobe Output Voltage VOH VST IO= -16 mA Inactive IO = -1 µ A Active, IO = 100 µ A to 500 µ A Continued... 5358 PHOTOELECTRIC SMOKE DETECTOR with INTERCONNECT and TIMER DC ELECTRICAL CHARACTERISTICS, continued Test Pin 4 4 6 6 6 6 7 – 9 Limits Typ. Max. -60 0.01 – 3.1 -35 +0.40 – – – 0.1 3.35 – – – Characteristic Line Regulation Strobe Temperature Coeff. IRED Output Voltage Symbol ∆VST(∆VDD) α ST.


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