RE46C105 Datasheet, PDF (1/5 Pages) Microchip Technology – Piezoelectric Horn Driver with Voltage Regulator and LED Driver

R&E International
A Subsidiary of Microchip Technology Inc.
RE46C105
Piezoelectric Horn Driver with Voltage Regulator and LED Driver
Product Specification
General Description
The RE46C105 is a piezoelectric horn driver with a
voltage regulator and an open drain NMOS driver
suitable for use with a light emitting diode. It is
intended for 9V battery applications which require a
low voltage logic supply. The regulator can be
operated at either 3.3V or 5V. The horn feedback
control pin is designed for use with self-oscillating
piezoelectric horn but can also be used in direct
drive applications. A low battery detection circuit is
also provided.
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
• Low Battery Detection
• Available in DIP and SOIC packaging
• Available in Standard Packaging or RoHS
Compliant Pb Free Packaging
Pin Configuration
LBOUT ₁
LBSTRB
LBSET
LED
VDD
LEDEN
FEED
14 ^REGEN
REGOUT
REGSEL
HRNEN
HORNS
HORNB
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