R&E International A Subsidiary of Microchip Technology Inc. RE46C105 Piezoelectric Horn Driver with Voltage Regulator and LED Driver Product Specification General Description Features The RE46C105 is a piezoelectric horn driver with a • Low Quiescent Current voltage regulator and an open drain NMOS driver • Low Horn Driver Ron suitable for use with a light emitting diode. It is • Voltage Regulation to 3.3V or 5V intended for 9V battery applications which require a • Low Battery Detection low voltage logic supply. The regulator can be • Available in DIP and SOIC packaging operated at either 3.3V or 5V. The horn feedback • Available in Standard Packaging or RoHS control pin is designed for use with self-oscillating Compliant Pb Free Packaging piezoelectric horn but can also be used in direct drive applications. A low battery detection circuit is Pin Configuration also provided. Applications LBOUT 1 14 REGEN Smoke detectors LBSTRB REGOUT CO Detectors LBSET REGSEL Personal Security Products Electronic Toys LED HRNEN VDD HORNS LEDEN HORNB FEED VSS Absolute maximum ratings Supply Voltage Vdd ........………………………………….......-.5V to +14V Input voltage Range Vin ...…………………………………..... -.3V to VDD+.3V, except FEED FEED Input Voltage Range Vinf …………………………...… -10V to +22V Input Current Iin ..............…………………………………..... 10mA, except FEED Operating Temperature .......………………………………….. -40 to 85°C Continuous Output Current (HornS, HornB) .……………….. 30mA Continuous Output Current (REGOUT) .…………………….. 55mA Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and operation at these conditions for extended periods may affect device reliability. This product utilizes CMOS technology with static protection; however proper ESD prevention procedures should be used when handling this product. Damage can occur when exposed to extremely high static electrical charges. © 2009 Microchip Technology Inc. DS22167A-page 1

RE46C105 Piezoelectric Horn Driver with Voltage Regulator and LED Driver R&E International Product Specification A Subsidiary of Microchip Technology Inc. Electrical Characteristics at TA = 25°C, VDD = 9V, Vss = 0V (unless otherwise noted). Test Limits Parameter Pin Test Conditions Min Typ Max Units Supply Voltage Vdd Operating 6.0 9.0 13.8 V Standby Supply Vdd Hrnen=Lbstrb=Leden=Vss 3.5 uA Current Regen=Vdd; No Loads Input Leakage Hrnen,Leden, Vin=Vdd or Vss -100 100 nA Lbstrb,Regen FEED Feed = +22V 20 50 uA FEED Feed = -10V -50 -15 uA Input Voltage Low Hrnen,Leden, 1.0 V Lbstrb,Regen Input Voltage High Hrnen,Leden 2.3 V Lbstrb,Regen Output Low Voltage Horns or Hornb Iout=16mA Vdd=9V 0.3 0.5 V Vdd=7.2V 0.9 V Iout=10mA Vdd=7.2V 0.5 1.0 V LED LBout Iout=100uA 0.3 0.5 V Output High Horns or Iout=-16mA Vdd=9V 8.5 8.7 V Voltage Hornb Vdd=7.2V 6.3 V Iout=-100uA Regsel=Vdd 4.5 4.75 V LBout Regsel=Vss 2.8 3.0 V Low Battery Lbstrb=Vdd, 7.2 7.80 V VoltageThreshold Vdd Vdd decreasing in voltage T =-40 to 85°C See note #3 A Low Battery Lbstrb=Vdd 300 mV Voltage Hysteresis Lbstrb Vdd increasing in voltage Lbstrb to Lbout Lbstrb, Lbout Lbstrb=Vdd 500 uS Active delay Regulator Voltage Regout Iout<50mA Regsel=Vdd 4.75 5.0 5.25 V Iout<50mA Regsel=Vss 3.10 3.3 3.50 V T =-40 to 85°C See note #3 A Line Regulation 6V<Vdd<12V 30 mV Regout No load Load Regulation Regout 0mA<Iout<50mA 100 mV Brown-Out Regsel=Vdd or Vss 4.5 5.0 5.5 V Threshold Voltage Vdd Falling edge of Vdd *See note #1 Brown-Out Pull Vdd=4.5V; Regout=2V 15 25 mA Down Current Regout Regout Overvoltage Regsel=Vdd; Iout > 1mA 5.5 6.0 6.5 V Clamp *See note #2 Regout Regsel=Vss; Iout > 1mA 3.7 4.0 4.3 V © 2009 Microchip Technology Inc. DS22167A-page 2

RE46C105 Piezoelectric Horn Driver with Voltage Regulator and LED Driver R&E International Product Specification A Subsidiary of Microchip Technology Inc. Notes: 1/ The brown-out threshold voltage is the Vdd voltage at which the regulator will be disabled and Regout will be pulled to Vss. 2/ In normal operation, the regulator will provide high-side current of up to 20mA, but current sinking capability is typically under 1uA. The over-voltage clamp is intended to limit the voltage at REGOUT when it is pulled up by an external source. 3/ The limits shown are 100% tested at 25C only. Test limits are guard-banded based on temperature characterization to guarantee compliance at temperature extremes. Typical Application © 2009 Microchip Technology Inc. DS22167A-page 3

RE46C105 Piezoelectric Horn Driver with Voltage Regulator and LED Driver R&E International Product Specification A Subsidiary of Microchip Technology Inc. Functional Block Diagram REGEN 14 Bandgap VDD 5 Reference 13 REGOUT VSS 1 REGSEL 12 Output Adjust Clamp & Shutdown Circuit Vdd 1 LBOUT LBSET 3 LBSTRB 2 7 FEED HRNEN 11 10 HORNS 9 HORNB 4 LED LEDE 6 © 2009 Microchip Technology Inc. DS22167A-page 4

RE46C105 Piezoelectric Horn Driver with Voltage Regulator and LED Driver R&E International Product Specification A Subsidiary of Microchip Technology Inc. Trademarks Information contained in this publication regarding device The Microchip name and logo, the Microchip logo, Accuron, applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, rfPIC, SmartShunt and UNI/O are registered that your application meets with your specifications. MICROCHIP trademarks of Microchip Technology Incorporated in the U.S.A. MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY and other countries. KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE FilterLab, Hampshire, Linear Active Thermistor, MXDEV, MXLAB, INFORMATION, INCLUDING BUT NOT LIMITED TO ITS SEEVAL, SmartSensor and The Embedded Control Solutions CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY Company are registered trademarks of Microchip Technology OR FITNESS FOR PURPOSE. Microchip disclaims all liability Incorporated in the U.S.A. arising from this information and its use. Use of Microchip devices in Analog-for-the-Digital Age, Application Maestro, CodeGuard, life support and/or safety applications is entirely at the buyer’s risk, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, and the buyer agrees to defend, indemnify and hold harmless ECONOMONITOR, FanSense, In-Circuit Serial Programming, Microchip from any and all damages, claims, suits, or expenses ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, resulting from such use. No licenses are conveyed, implicitly or MPLIB, MPLINK, mTouch, nanoWatt XLP, PICkit, PICDEM, otherwise, under any Microchip intellectual property rights. PICDEM.net, PICtail, PIC32 logo, PowerCal, PowerInfo, 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. DS22167A-page 5

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