RE46C120 Ver la hoja de datos (PDF) - Microchip Technology

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RE46C120

CMOS Ionization Smoke Detector ASIC

Microchip Technology 

RE46C120

CMOS Ionization Smoke Detector ASIC

Product Specification

R&E International

A Subsidiary of Microchip Technology Inc.

Standby Mode; No Low Battery; No Alarm

Timing Diagram

Alarm; No Low Battery

Alarm; Low Battery

No Alarm; Low Battery

Oscillator

Internal Clock

LED

DETCOMP (pin1)

Sample (2/3 Duty)

Sample (NFPA72)

Pin 15 > Pin 13

1.67S 10mS

24 Clock Cycles (40 S)

Horn (2/3 Duty Cycle, TONE=VSS)

Horn (NFPA72, TONE=Open)

Pin 13 > Pin 15; 130mV Level Shift on Pin 13

24 Clock Cycles (1S)

THON3

THOF3

See Figure Below for Complete Temporal Horn Cycle

Pin 15 > Pin 13

Low Battery Warning Chirp

Low Battery Warning Chirp

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

THON1 THOF1

THOF2

Complete Temporal Horn Pattern

© 2009 Microchip Technology Inc.

DS22157B-page 6

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