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MC14468 bảng dữ liệu(PDF) 1 Page - Motorola, Inc |
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MC14468 bảng dữ liệu(HTML) 1 Page - Motorola, Inc |
1 / 8 page 1 Motorola Sensor Device Data Low–Power CMOS Ionization Smoke Detector IC with Interconnect The MC14468, 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. • Ionization Type with On–Chip FET Input Comparator • Piezoelectric Horn Driver • Guard Outputs on Both Sides of Detect Input • Input–Production Diodes on the Detect Input • Low–Battery Trip Point, Internally Set, can be Altered Via External Resistor • Detect Threshold, Internally Set, can be Altered Via External Resistor • Pulse Testing for Low Battery Uses LED for Battery Loading • Comparator Output for Detect • Internal Reverse Battery Protection • Strobe Output for External Trim Resistors • I/O Pin Allows Up to 40 Units to be Connected for Common Signaling • Power–On Reset Prevents False Alarms on Battery Change MAXIMUM RATINGS* (Voltages referenced to VSS) Rating Symbol Value Unit DC Supply Voltage VDD *0.5 to + 15 V Input Voltage, All Inputs Except Pin 8 Vin *0.25 to VDD + 0.25 V DC Current Drain per Input Pin, Except Pin 15 = 1 mA I 10 mA DC Current Drain per Output Pin I 30 mA Operating Temperature Range TA *10 to + 60 °C Storage Temperature Range Tstg *55 to + 125 °C Reverse Battery Time tRB 5.0 s * Maximum Ratings are those values beyond which damage to the device may occur. This device contains circuitry to protect the inputs against damage due to high static voltages or electric fields; however, it is advised that normal precautions be taken to avoid application of any voltage higher than maximum rated voltages to this high impedance circuit. For proper operation it is recommended that Vin and Vout be constrained to the range VSS v (Vin or Vout) v VDD. Order this document by MC14468/D MOTOROLA SEMICONDUCTOR TECHNICAL DATA © Motorola, Inc. 2000 MC14468 P SUFFIX PLASTIC DIP CASE 648–08 PIN ASSIGNMENT (16 PIN DIP) 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 Detect Comp. Out I/O Low V Set Strobe Out LED VDD Timing Resistor Feedback Guard Hi–Z Detect Input Guard Lo–Z Sensitivity Set Osc Capacitor Silver Brass VSS ORDERING INFORMATION MC14468P PLASTIC DIP 1 16 REV 3 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
Số phần tương tự - MC14468 |
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Mô tả tương tự - MC14468 |
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