MC145018 Ver la hoja de datos (PDF) - Motorola => Freescale

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MC145018

Low-Power CMOS Ionization Smoke Detector IC with Interconnect and Temporal Horn Driver

Motorola => Freescale 

MC145018

OSC

PIN 12

1 23 45 67 8 9

23 24 1

SMOKE – N

–Y

LOW BAT – Y

–N

NO SMOKE, LOW BATTERY

NO SMK

NO LOW BAT

6

12

18

24

SMOKE

LATCH ALARM CONDITION

HYST

PIN 13

% [( 100 mV LEVEL SHIFT)

OSC

PIN 12

SMOKE – N

–Y

NO SMK

LOW BAT – Y

–N

HORN – ON

– OFF

LED – OFF

– ON

& LOW BATTERY CHIRP

24 CLOCKS

& NFPA MOD

24 CLOCKS

(NOTE 1)

HORN – ON

– OFF

LED – OFF

– ON

Figure 6. MC145018 Timing Diagram

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.

NFPA72: TEMPORAL HORN

MODULATION PATTERN

0.5 SEC

0.5 SEC

0.5 SEC

0.5 SEC

0.5 SEC

1.5 SEC

167 msec

TRADITIONAL 4/6 HORN

MODULATION PATTERN

83 msec

Figure 7. Horn Modulation

6

Motorola Sensor Device Data

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