MC14568 Freescale Semiconductor, MC14568 Datasheet - Page 6

• Manufacturer Part Number: MC14568
• Description: Low-Power CMOS Ionization Smoke Detector
• Manufacturer: Freescale Semiconductor

MC14568
6
Pin 1 TIMER START
NO SMOKE
SMOKE
Pin 4 TIMER OUT
Pin 12 OSC CAP
Internal Clock
Pin 5 LED
10 ms
Check for Smoke Window
Check for Smoke Window
Figure 4. MC14568 Oscillator Waves in Stand By and Smoke Conditions
Figure 3. MC14568 Timing Diagram for the Timer Circuit
10 ms
40 ms
1.67 s
Check for Smoke Window
6 Clock Cycles
231 Clock Cycles
Freescale Semiconductor
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Sensors