RE46C144
Oscillator
TPOSC TPWOSC
Standby, No Alarm (not to scale)
Internal Clock
STROBE
TON1
TPER1
TON2
IRED
TPLED1
LED
LED
Horn
Low Supply or Chamber Test Failure
Low BatteryTest
Low Battery Warning Chirp
THON3
Low Battery Warning Chirp
FIGURE 3-1:
THOF3
Chamber Test and Warning is Offset from Low Battery Test and Warning by 21.5 Seconds
RE46C144 Timing Diagram – Standby, Low Supply and Chamber Test Failure.
2009-2012 Microchip Technology Inc.
DS22180C-page 11