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MC14468 Datasheet(PDF) 6 Page - Freescale Semiconductor, Inc

Part No. MC14468
Description  Low-Power CMOS Ionization Smoke Detector IC with Interconnect
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Maker  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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MC14468 Datasheet(HTML) 6 Page - Freescale Semiconductor, Inc

   
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Sensors
6
Freescale Semiconductor
MC14468
Figure 7. 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 on once per clock cycle (1.67 s for no smoke, 40 ms for smoke).
3. Low battery comparator information is latched only during LED pulse.
4. ~ 100 mV p-p swing.
HYSTERESIS (Internal)
(Pin 13) (Pin 14)
DETECT OUT
(Pin 1)
LOW BATTERY
(Internal)
SAMPLE (Internal)
Smoke
HORN
(Pin 10 and 11)
Low = Disable
High = Enable
LED
(Pin 5)
OSCILLATOR
(Pin 12)
Smoke/No Low Battery
Smoke/Low Battery
No Smoke/Low Battery
40 ms
10 ms
1.67 s
Standby
No Smoke/
No Low Battery
24 Clock Cycles (0.96 s)
24 Clock Cycles
(40S)
24 Clock Cycles
6 Clock
Suppressed Chirp
Battery Test
(Note 3)
(Note 3)
(Note 1)
Cycles (10.0 s)
STROBE OUT
(Pin 14)
I/O (Pin 2)
Output (Local)
I/O (Pin 2)
Input (Remote)
LED
Note: Horn Modulation Not Self-Completing
(Suppressed LED for Remote Only)


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Part NumberComponents DescriptionHtml ViewManufacturer
MC14568Low-Power CMOS Ionization Smoke Detector with Interconnect and Timer 1 2 3 4 5 MoreFreescale Semiconductor, Inc

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