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RE46C108 Datasheet

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R&E International
A Subsidiary of Microchip Technology Inc.
RE46C108
Piezoelectric Horn Driver and Voltage Regulator
Product Specification
General Description
The RE46C108 is a piezoelectric horn driver with a
voltage regulator that can operate at 3.3V or 5V. It
is intended for applications requiring a 9V horn
driver with a low voltage logic supply. The horn
feedback control pin is designed for use with self-
oscillating piezoelectric horn but can also be used in
direct drive applications.
Applications
Smoke detectors
CO Detectors
Personal Security Products
Electronic Toys
Absolute maximum ratings
Supply Voltage V dd ........………………………………….......-.5V to +14V
Input voltage Range V in ...…………………………………..... -.3V to V DD +.3V, except FEED
FEED Input Voltage Range Vinf …………………………...… -10V to +22V
Input Current I in ..............…………………………………..... 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.
Features
Low Quiescent Current
Low Horn Driver Ron
Voltage Regulation to 3.3V or 5V
Available in DIP and SOIC packaging
Available in Standard Packaging or RoHS
Compliant Pb Free Packaging
Pin Configuration
REGSEL
1
8
VDD
REGOUT
FEED
HRNEN
HORNS
HORNB
VSS
DS22165A-page 1

Summary of Contents

Page 1

... RE46C108 Piezoelectric Horn Driver and Voltage Regulator Product Specification General Description The RE46C108 is a piezoelectric horn driver with a voltage regulator that can operate at 3. intended for applications requiring a 9V horn driver with a low voltage logic supply. The horn feedback control pin is designed for use with self- oscillating piezoelectric horn but can also be used in direct drive applications ...

Page 2

... RE46C108 Piezoelectric Horn Driver and Voltage Regulator Product Specification Electrical Characteristics 25° 9V (unless otherwise noted). Test Parameter Pin Supply Voltage Vdd Standby Supply Vdd Current Input Leakage Hrnen,Resel FEED FEED Input Voltage Low Hrnen, Regsel Input Voltage High ...

Page 3

... RE46C108 Piezoelectric Horn Driver and Voltage Regulator Product Specification Bandgap Reference VDD 2 REGSEL 1 Clamp & Shutdown Circuit 8 HRNEN VSS 5 © 2009 Microchip Technology Inc. Typical Application Functional Block Diagram Output Adjust R&E International A Subsidiary of Microchip Technology Inc. 3 REGOUT 4 FEED 7 HORNS 6 HORNB ...

Page 4

... RE46C108 Piezoelectric Horn Driver and Voltage Regulator Product Specification Information contained in this publication applications and the like is provided only for your convenience and may be superseded by updates your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY ...

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