RE46C152E16F

R&E International A Subsidiary of Microchip Technology Inc. RE46C152 CMOS Ionization Smoke Detector ASIC with Interconnect, Timer Mode and Tone Select Product Specification General Description Features The RE46C152 is a low power CMOS ionization type smoke detector IC. With few external components this circuit will provide all the required features for an ionization type smoke detector. • • • • • • • • • • • • An internal oscillator strobes power to the smoke detection circuitry for 10.5mS every 1.66 seconds to keep standby current to a minimum. A check for a low battery condition is performed every 40 seconds when in standby. The Tone input allows for selection of a temporal pattern or a 2/3 duty cycle continuous tone. The temporal horn pattern supports the NFPA 72 emergency evacuation signal. >1500V ESD Protection (HBM) on all Pins Guard Outputs for Ion Detector Input +/-0.75pA Detect Input Current Internal Reverse Battery Protection Low Quiescent Current Consumption ( Pin 15; 130mV Level Shift on Pin 13 Pin 15 > Pin 13 10.5mS Internal Clock 24 Clock Cycles (40 S) 24 Clock Cycles (1S) LED Sample Smoke (NFPA72) THON3 THOF3 Low Battery Warning Chirp Horn (2/3 Duty Cycle, TONE=VSS) Low Battery Warning Chirp Horn (NFPA72, TONE=Open) See Figure Below for Complete Temporal Horn Cycle TIODLY1 IO (Pin 2) as Output Timing not same scale as above IO Charge Dump TIOFILT IO ( Pin 2) as Input LED supressed in remote alarmmode TIODLY2 Horn Start of horn temporal pattern is not synchronized to an external alarm Horn pattern not self completing for external alarm,see timing below for complete horn cycle Internal Clock Notes: 1. Smoke is not sampled when the horn is active. Horn cycle is self completing in local alarm. 2. Low battery warning chirp is suppressed in local or remote alarm 3. IO Dump active only in local alarm, inactive if external alarm THON1 THOF1 THOF2 Complete Temporal Horn Pattern © 2009 Microchip Technology Inc. DS22175A-page 10 RE46C152 CMOS Ionization Smoke Detector ASIC with Interconnect, Timer Mode and Tone Select Product Specification R&E International A Subsidiary of Microchip Technology Inc. Timing Diagram (Timer Mode) Oscillator 10.5mS 1.67S Internal Clock TSTART TLOF3 LED Outputs High Z TSTROBE TTPER © 2009 Microchip Technology Inc. DS22175A-page 11 RE46C152 CMOS Ionization Smoke Detector ASIC with Interconnect, Timer Mode and Tone Select Product Specification Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights. R&E International A Subsidiary of Microchip Technology Inc. Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, rfPIC, SmartShunt and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Hampshire, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, nanoWatt XLP, PICkit, PICDEM, 32 logo, PowerCal, PowerInfo, PICDEM.net, PICtail, PIC PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2009, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. © 2009 Microchip Technology Inc. DS22175A-page 12