RE46C127 Datasheet, PDF (8/10 Pages) Microchip Technology – CMOS Ionization Smoke Detector ASIC with Interconnect and Timer Mode

RE46C127
CMOS Ionization Smoke Detector ASIC with
Interconnect and Timer Mode
Product Specification
R&E International
A Subsidiary of Microchip Technology Inc.
Timing Diagram (non Timer Mode)
Standby M ode; No Low Battery; No Alarm
Alarm; No Low Battery
Alarm; Low Battery
No Alarm; Low Battery
Oscillator
Internal Clock
LED
Pin 15 > Pin 13
1.67S 10.5mS
24 Clock Cycles (40 S)
Pin 13 > Pin 15; 130mV Level Shift on Pin 13
Pin 15 > Pin 13
24 Clock Cycles (1S)
Ouput High Z
Sample Smoke
Horn
T_HON1
T_HOF1
T_IODLY
IO (Pin 2) as Output
Timing not same scale as above
IO Charge Dump
IO ( Pin 2) as Input
T_{I OFI LT}
T_{I OD LY 2}
LED supressed in remote alarm mode
Horn Start of horn pattern is not synchronized to an external alarm
Horn pat t ern not self complet ing f or ext ernal alarm
Internal Clock
Notes:
1. Smoke is not sampled w hen the horn is active. Horn cycle is self completing in local alarm.
2. Low battery w arning chirp is suppressed in local or remote alarm
3. IO Dump active only in local alarm, inactive if external alarm
Low Battery Warning Chirp
© 2009 Microchip Technology Inc.
DS22174A-page 8