RE46C122 Datasheet, PDF (8/10 Pages) List of Unclassifed Manufacturers – CMOS Ionization Smoke Detector ASIC with Interconnect and Timer Mode Preliminary Product Specification

RE46C122
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 Mode; 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
24 Clock Cycles (1S)
Pin 15 > Pin 13
Sample Smoke
Horn
IO (Pin 2) as Output
See Figure Below for Complete Horn Cycle
T_IODLY1
Timing not same scale as above
Low Battery Warning Chirp
IO Charge Dump
T_IOFILT
IO ( Pin 2) as Input
Horn Start of horn temporal pattern is not synchronized to an external alarm
T_IODLY2
LED supressed in remote alarm mode
Horn pattern not self completing for external alarm,see timing below for complete horn cycle
Internal Clock
Notes:
1. Smoke is not sampled when the horn is active. Horn cycle is self completing in local alarm.
2. Low battery warning chirp is suppressed in local or remote alarm
3. IO Dump active only in local alarm, inactive if external alarm
T_HON1 T_HOF1
T_HOF2
Complete Temporal Horn Pattern
© 2009 Microchip Technology Inc.
DS22173A-page 8