MC145018 查看數據表（PDF） - Freescale Semiconductor
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MC145018
Freescale Semiconductor
MC145018 Datasheet PDF : 8 Pages
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OSC
Pin 12
Smoke - N
-Y
Low Bat - Y
-N
HYST
Pin 13
1 23 45 67 8 9
23 24 1
6
12
18
No Smoke, Low Battery
No Smk
No Low Bat
Smoke
Latch Alarm Condition
( 100 mV Level Shift)
24
OSC
Pin 12
Smoke - N
-Y
No Smk
Low Bat - Y
-N
Horn - On
- Off
Low Battery Chirp >>
LED - Off
- On
24 Clocks
NFPA Mod >>
(Note 1)
24 Clocks
Horn - On
- Off
LED - Off
- On
Figure 7. MC145017 Timing Diagram
NOTE:
1. Horn modulation is self-completing. When going from smoke to no smoke, the alarm condition will terminate only when
horn is off.
Comparators are strobed once per cycle (1.65 sec for no smoke, 40 msec for smoke).
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
167msec
Traditional 4/6 Horn
Modulation Pattern
83 msec
Figure 8. Horn Modulation
MC145018
6
Sensors
Freescale Semiconductor
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