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 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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