RE46C100 Piezoelectric Horn Driver Circuit Features: Package Types RE46C100 Low Quiescent Current (< 100 nA) PDIP, SOIC Low Driver R 20typical at 9V ON NC HRNEN 1 8 Wide Operating Voltage Range V 2 HORNS DD 7 Available in 8-pin DFN, PDIP and SOIC packages NC 3 6 HORNB FEED 4 5 V SS General Description: The RE46C100 devices are intended for applications RE46C100 using a self oscillating piezoelectric horn, although it 2x3 DFN* can be used in direct drive applications. Feedback NC 1 8 HRNEN control and a driver circuit are provided, as well as a horn enable function. V 2 7 HORNS EP DD 9 The RE46C100 is intended for use in smoke detectors, NC 3 6 HORNB CO detectors, personal security products and FEED V 4 5 SS electronic toys. * Includes Exposed Thermal Pad (EP) see Table 2-1. Functional Block Diagram 4 FEED HORNS 7 8 HRNEN 2 V DD V SS 5 6 HORNB 2009-2014 Microchip Technology Inc. DS20002166B-page 1RE46C100 Typical Application Horn Enable Active High 1 8 2 7 + RE46C100 (1) 9V C2 3 6 Battery - 1 F 4 5 R3 R4 C1 1.5 M 220 k 0.001 F Note 1: Place C2 close to the device power pins to minimize horn switching noise. DS20002166B-page 2 2009-2014 Microchip Technology Inc.