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MC145017 Fiches technique(PDF) 5 Page - Freescale Semiconductor, Inc

No de pièce MC145017
Description  Low-Power CMOS Ionization Smoke Detector IC with Temporal Pattern Horn Driver
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Fabricant  FREESCALE [Freescale Semiconductor, Inc]
Site Internet  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MC145017 Fiches technique(HTML) 5 Page - Freescale Semiconductor, Inc

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Sensors
Freescale Semiconductor
5
MC145017
battery, respectively. Pin 1 = VDD for smoke and Pin 4 = VDD
for low battery. In this mode and during the 10 ms power
strobe, chip current rises to approximately 50
µA.
Led Pulse
The 9-volt battery level is checked every 40 seconds
during the LED pulse. The battery is loaded via a 10 mA
pulse for 11.6 ms. If the LED is not used, it should be replaced
with an equivalent resistor such that the battery loading
remains at 10 mA.
Hysteresis
When smoke is detected, the resistor/divider network that
sets sensitivity is altered to increase sensitivity. This yields
approximately 100 mV of hysteresis and reduces false
triggering.
Figure 6. Typical Application as Ionization Smoke Detector
Figure 7. MC145017 Timing Diagram
MC145017
116
2
3
4
5
6
7
8
15
14
13
12
11
10
9
330
8.2 M
+
9 V
0.1
µF
1.5 M
Ω*
0.001
µF
220 k
Ω*
0.1
µF
1 M
1 M
Test
*NOTE: Component values may change depending on type of piezoelectric horn used.
OSC
Pin 12
Smoke - N
- Y
Low Bat - Y
- N
HYST
Pin 13
HORN - On
- Off
LED - Off
- On
23
4
5
6
7
9
8
1
No Smk
No Low Bat
LOW BATTERY CHIRP
OSC
Pin 12
Smoke - N
- Y
No Smk
23
24 1
6
12
18
24
Smoke
Latch Alarm Condition
( 100 mV Level Shift)
NFPA MOD
LOW BAT - Y
- N
HORN - ON
- OFF
LED - OFF
- ON
(Note 1)
24 Clocks
24 Clocks
No Smoke, Low Battery
>>
>>
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).


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Numéro de composants électroniques

No de pièceDescriptionHtml ViewFabricant
MC145012 Photoelectric Smoke Detector IC with I/O and Temporal Pattern Horn Driver 1  2  3  4  5  More Freescale Semiconductor, Inc
MC14568 Low-Power CMOS Ionization Smoke Detector with Interconnect and Timer 1  2  3  4  5  More Freescale Semiconductor, Inc
MC14468 Low-Power CMOS Ionization Smoke Detector IC with Interconnect 1  2  3  4  5  More Freescale Semiconductor, Inc
MC14467-1_07 Low-Power CMOS Ionization Smoke Detector IC 1  2  3  4  5  More Freescale Semiconductor, Inc

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