R&E International
A Subsidiary of Microchip Technology Inc.
RE46C104
Piezoelectric Horn Driver and Voltage Converter
Product Specification
General Description
The RE46C104 is a piezoelectric horn driver with
voltage converter to provide maximum audibility in
low voltage applications. The feedback control pin is
designed for use with self-oscillating piezoelectric
horn but can also be used in direct drive
applications. The built-in charge pump voltage
converter provides increased supply voltage for the
horn drivers allowing outputs to swing from Vss to 2
x Vdd. A charge pump enable pin is provided to
minimize supply current when not in use.
Applications
Smoke detectors
CO Detectors
Personal Security Products
Electronic Toys
Features
• Low Quiescent Current
• Low Driver Ron
• Wide Operating Voltage Range
• Available in Standard Packaging or RoHS
Compliant Pb Free Packaging
Pin Configuration
N/C
FEED
CAP-
Vss
HRNEN
N/C
CAP+
N/C
Vdd
CPMPEN
HORNS
VPOS
N/C
HORNB
1
14
Absolute maximum ratings
Supply Voltage V
dd
........………………………………….......-.5V to +9.0V
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 .......………………………………….. 0 to 50°C
Continuous Output Current (HornS, HornB, or Vpos)…..….. 30mA
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. DS22164A-page 1
