RE46C144
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
STROBE
IRED
LED
LED
Horn
Low BatteryTest
Low BatteryWarning Chirp
TPER1
TON2
TPLED1
Low Supply or Chamber Test Failure
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.
DS22180A-page 10