Document
RE46C100
Piezoelectric Horn Driver Circuit
Features:
• Low Quiescent Current (< 100 nA) • Low Driver RON – 20typical at 9V • Wide Operating Voltage Range • Available in 8-pin DFN, PDIP and SOIC packages
General Description:
The RE46C100 devices are intended for applications using a self oscillating piezoelectric horn, although it can be used in direct drive applications. Feedback control and a driver circuit are provided, as well as a horn enable function. The RE46C100 is intended for use in smoke detectors, CO detectors, personal security products and electronic toys.
Functional Block Diagram
HRNEN 8
Package Types
RE46C100 PDIP, SOIC
NC 1 VDD 2 NC 3 FEED 4
8 HRNEN
7 HORNS 6 HORNB 5 VSS
RE46C100 2x3 DFN*
NC 1
8 HRNEN
VDD 2 EP 7 HORNS NC 3 9 6 HORNB
FEED 4
5 VSS
* Includes Exposed Thermal Pad (EP); see Table 2-1.
4 FEED 7 HORNS
VDD 2
VSS 5
6 HORNB
2009-2014 Microchip Technology Inc.
DS20002166B-page 1
RE46C100
Typical Application
Horn Enable Active.