RE46C120
CMOS Ionization Smoke Detector ASIC
Product Specification
R&E International
Timing Diagram
Standby Mode; No Low Battery; No Alarm
Alarm No Low Battery
;
Alarm Low Battery
;
No Alarm Low Battery
;
Oscillator
Pin 15 > Pin 13
Pin 13 > Pin 15; 130m Level Shift on Pin 13
V
Pin 15 > Pin 13
1.67S
10m
S
Internal Clock
24 Clock Cycles (40 S)
24 Clock Cycles (1S)
LED
DETCOMP (pin1)
Sample (2/3 Duty)
Sample (NFPA72)
T
HON3
T
HOF3
Low Battery Warning Chirp
Horn (2/3 Duty Cycle, TONE=VSS)
Low Battery Warning Chirp
Horn (NFPA72, TONE=Open or VDD)
See Figure Below for Com
plete Tem
poral Horn Cycle
Notes:
1. Smoke is not sampled when the horn is active so the horn cycle is self completing
2. Low battery warning chirp is suppressed in alarm
T
HON1
T
HOF1
T
HOF2
Complete Temporal Horn Pattern
Telephone 610.992.0727
Page 6 of 7
E-mail: rande@randeint.com
DS-RE46C120-010907
This datasheet contains PROPRIETARY and CONFIDENTIAL information.
Facsimile 610.992.0734
RANDE [ R & E INTERNATIONAL, INC. ]
