RE46C145

CMOS Photoelectric Smoke Detector ASIC with

R&E International

Interconnect and Timer Mode

A Subsidiary of Microchip Technology Inc.

Product Specification

© 2009 Microchip Technology Inc.

DS22181A-page 11

Timing Diagrams (continued)

Local Alarm Timing (not to scale)

STROBE

IRED

LED

No Alarm

Local or Remote Alarm

No Alarm

Horn Temporal Pattern

Horn

Interconnect Timing

IO as Output

IO as Input

Notes:

1. Smoke is not sampled when the horn is active. Horn cycle is self completing in local alarm but not in remote 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.