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RE46C145 Datasheet - Page 11

Download or read online Microchip Technology RE46C145 CMOS Photoelectric Smoke Detector ASIC With Interconnect And Timer Mode pdf datasheet.



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Oscillator
T
T
POSC
PWOSC
Internal Clock
T
ON1
STROBE
IRED
LED
LED
Low BatteryTest
Low BatteryWarning Chirp
Horn
Chamber Test and Warning is Offset from Low Battery Test and Warning by 21.5 Seconds.
FIGURE 3-1:
RE46C145 Timing Diagram – Standby, Low Supply and Chamber Test Failure.
 2009-2012 Microchip Technology Inc.
Standby, No Alarm (not to scale)
T
PER1
T
ON2
T
PLED1
Low Supply or Chamber Test Failure
Low Battery Warning Chirp
T
HOF3
RE46C145
T
HON3
DS22181C-page 11

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