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

LBSTRB

LBSET

LED

LEDEN

FEED

VDD

REGEN

REGOUT

REGSEL

HRNEN

HORNB

VSS

HORNS

1

14

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.

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