MPXM2102AS datasheet(657/670 Pages) MOTOROLA

657 / 670 page

MC145018

4–65

Motorola Sensor Device Data

www.motorola.com/semiconductors

Figure 6. MC145018 Timing Diagram

OSC

PIN 12

SMOKE – N

– Y

LOW BAT – Y

– N

HYST

PIN 13

HORN – ON

– OFF

LED – OFF

– ON

NO SMOKE, LOW BATTERY

NO SMK

NO LOW BAT

LOW BATTERY CHIRP

OSC

PIN 12

SMOKE – N

– Y

NO SMK

24 1

SMOKE

LATCH ALARM CONDITION

%([100 mV LEVEL SHIFT)

NFPA MOD

LOW BAT – Y

– N

HORN – ON

– OFF

LED – OFF

– ON

(NOTE 1)

24 CLOCKS

NOTES:

1. Horn modulation is self–completing. When going from smoke to no smoke, the alarm condition will terminate only when horn is off.

2. Comparators are strobed once per cycle (1.65 sec for no smoke, 40 msec for smoke).

3. For timing under remote conditions, refer to MC14468 data sheet.

Figure 7. Horn Modulation

NFPA72: TEMPORAL HORN

MODULATION PATTERN

TRADITIONAL 4/6 HORN

MODULATION PATTERN

0.5 SEC

1.5 SEC

167 msec

83 msec

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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