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
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
VDD
REGOUT
FEED
HRNEN
HORNS
HORNB
VSS
1
8
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. DS22165A-page 1
