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RE46C152 Datasheet - Page 10

Download or read online Microchip Technology RE46C152 CMOS Ionization Smoke Detector ASIC With Interconnect, Timer Mode And Tone Select pdf datasheet.



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RE46C152
CMOS Ionization Smoke Detector ASIC with Interconnect,
Timer Mode and Tone Select
Product Specification
Standby Mode; No Low Battery; No Alarm
Oscillator
Pin 15 > Pin 13
1.67S
10.5m S
Internal Clock
24 Clock Cycles (40 S)
LED
Sample Smoke (NFPA72)
Horn (2/3 Duty Cycle, TONE=VSS)
Horn (NFPA72, TONE=Open)
IO (Pin 2) as Output
Tim ing not sam e scale as above
IO Charge Dump
T
IOFILT
IO ( Pin 2) as Input
Horn
Start of horn tem poral pattern is not synchronized to an external alarm
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
T
HON1
HOF1
Complete Temporal Horn Pattern
© 2009 Microchip Technology Inc.
Timing Diagram (non Timer Mode)
Alarm ; No Low Battery
Pin 13 > Pin 15; 130m V Level Shift on Pin 13
24 Clock Cycles (1S)
T
T
HON3
HOF3
See Figure Below for Com plete Tem poral Horn Cycle
T
IODLY1
LED supressed in rem ote alarm m ode
T
IODLY2
Horn pattern not self com pleting for external alarm ,see tim ing below for com plete horn cycle
T
HOF2
R&E International
A Subsidiary of Microchip Technology Inc.
Alarm ; Low Battery
No Alarm ; Low Battery
Pin 15 > Pin 13
Low Battery Warning Chirp
Low Battery Warning Chirp
DS22175A-page 10

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