RE46C145
CMOS Photoelectric Smoke Detector ASIC with
Interconnect and Timer Mode
Product Specification
R&E International
A Subsidiary of Microchip Technology Inc.
Timing Diagrams
Oscillator
Standby, No Alarm (not to scale)
TPOSC TPWOSC
Internal Clock
TON1
TPER1
STROBE
TON2
IRED
TPLED1
LED
LED
Horn
Low Supply or Chamber Test Failure
Low BatteryTest
Low BatteryWarning Chirp
Low Battery Warning Chirp
THON3
THOF3
Chamber Test and Warning is Offset from Low Battery Test and Warning by 21.5 Seconds.
© 2009 Microchip Technology Inc.
DS22181B-page 10