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MC14468ED Datasheet(PDF) 1 Page - Freescale Semiconductor, Inc |
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MC14468ED Datasheet(HTML) 1 Page - Freescale Semiconductor, Inc |
1 / 9 page Document Number: MC14468 Rev 5.0, 11/2006 Freescale Semiconductor Technical Data © Freescale Semiconductor, Inc., 2006. All rights reserved. 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. Features • 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 • Pb-Free Packaging Designated by Suffix Code ED ORDERING INFORMATION Device Temperature Range Case No. Package MC14468P –10 ° to 60°C 648-08 Plastic Dip MC14468ED MC14468 LOW-POWER CMOS IONIZATION SMOKE DETECTOR IC WITH INTERCONNECT P SUFFIX ED SUFFIX (PB-FREE) 16-LEAD PLASTIC DIP CASE 648-08 16 15 14 13 12 11 10 1 2 3 4 5 6 7 8 DETECT COMP. OUT I/O LOW V SET STROBE OUT LED TIMING RESISTOR FEEDBACK GUARD HI-Z DETECT INPUT GUARD LO-Z SENSITIVITY SET OSC CAPACITOR SILVER BRASS VSS VDD 9 Figure 1. Pin Connections |
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