MC14568 Freescale Semiconductor, MC14568 Datasheet
MC14568
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MC14568 Summary of contents
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... Product Preview Low-Power CMOS Ionization Smoke Detector with Interconnect and Timer The MC14568, when used with an ionization chamber and a small number of external components, will detect smoke. When smoke is sensed, an alarm is sounded via an external piezoelectric transducer and internal drivers. This circuit is designed to operate in smoke detector systems that comply with UL217 and UL268 specifications ...
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... Maximum Current Output Pins (Pins 10, 11) Maximum Current (Pin 15) Operating Temperature Range Storage Temperature Range Human Body Model ESD Rating CAUTION: CMOS devices have input static protection but are susceptible to damage when exposed to extremely high static electrical charges. MC14568 2 I – ...
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... MC14568 Unit kΩ min µA µ ...
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... VDD (PIN 6) This is the positive power supply for the entire IC. TIMING RESISTOR (PIN 7) This pin, when tied through a resistor to VDD, works along with pin 12 to set the bias current that controls the oscillation frequency. MC14568 4 = +25° 9 ...
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... NOT cause the oscillator to speed up as does a SMOKE condition). Low battery check will still be performed in reduced sensitivity mode and a low battery chirp will be heard if V falls below specified value. DD TIMER An internal timer is provided that can be used in various configurations to allow for a period of reduced smoke detector sensitivity. MC14568 5 ...
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... Pin 4 TIMER OUT Pin 5 LED Figure 3. MC14568 Timing Diagram for the Timer Circuit NO SMOKE Check for Smoke Window SMOKE 10 ms Check for Smoke Window Figure 4. MC14568 Oscillator Waves in Stand By and Smoke Conditions MC14568 6 Check for Smoke Window 231 Clock Cycles 6 Clock Cycles 10 ms 1.67 s ...
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... NOTE 2: The sensitivity adjustment set point can be tailored to the customer’s requirement during the timer mode can with the use of an external resistor. NOTE 3: The Smoke Reference set point can be tailored to the customer’s requirement with the use of an external resistor. Figure 5. MC14568 Typical Application Diagram Sensors Freescale Semiconductor 1 M ...
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... The MC14568 is supplied in a low-cost, 16-pin dual in-line plastic package rated for continuous operation over the tem- perature range of 0°C to +50°C. MC14568 8 PACKAGE DIMENSIONS CASE 648-08 ISSUE T 16-LEAD PLASTIC DIP PAGE Sensors Freescale Semiconductor ...
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... Sensors Freescale Semiconductor PACKAGE DIMENSIONS CASE 648-08 ISSUE T 16-LEAD PLASTIC DIP PAGE MC14568 9 ...
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... MC14568 10 PACKAGE DIMENSIONS CASE 648-08 ISSUE T 16-LEAD PLASTIC DIP PAGE Sensors Freescale Semiconductor ...
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... Freescale Semiconductor Literature Distribution Center P.O. Box 5405 Denver, Colorado 80217 1-800-441-2447 or 303-675-2140 Fax: 303-675-2150 LDCForFreescaleSemiconductor@hibbertgroup.com MC14568 Rev. 1.0 11/2006 RoHS-compliant and/or Pb-free versions of Freescale products have the functionality and electrical characteristics of their non-RoHS-compliant and/or non-Pb-free counterparts. For further information, see http://www.freescale.com Freescale sales representative. For information on Freescale’ ...