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A5366CA Datasheet(PDF) 8 Page - Allegro MicroSystems |
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A5366CA Datasheet(HTML) 8 Page - Allegro MicroSystems |
8 / 12 page 5366 PHOTOELECTRIC SMOKE DETECTOR with INTERCONNECT and TIMER 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 8 TYPICAL APPLICATION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 OSC. & TIMING HORN DRIVER VSS VDD LOGIC Dwg. EC-006 TO/FROM OTHER UNITS 9 V PUSH TO TEST V DD CONNECT FOR TIMER MODE OR "HUSH" OPERATION CONNECT FOR NON-TIMER MODE OPERATION SMOKE CHAMBER 1k Ω 100 µF 100k Ω 1000pF 220k Ω 560 Ω 200k Ω 220 Ω + + C1 C2 The Diagnostic Test Mode is initiated by pulling this pin below VSS and continuously sourcing 100 µA from the pin for at least one clock cycle on the OSC. CAP. pin. This mode is used to facilitate calibration and test of the IC and the assembled detector. In this mode, certain device pins are reconfigured as described below. In this mode, the IRED pulse rate is increased to one every OSC. CAP. cycle and the STROBE pin is always active. To exit this mode, the test pin is floated for at least one OSC. CAP. cycle. Pin Name Pin No. Configuration HORN1 8 This pin is reconfigured as the smoke integrator output. Three consecutive smoke detections will cause this pin to go high and three consecutive no- smoke detections cause this pin to go low. LED 11 This pin becomes a low-battery indicator. The open-drain NMOS output is normally OFF. If VDD falls below the low- battery threshold, the output turns ON. PIN AND CIRCUIT DESCRIPTION, continued |
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