RE46C100_14 Datasheet, PDF (1/18 Pages) Microchip Technology – Piezoelectric Horn Driver Circuit

RE46C100
Piezoelectric Horn Driver Circuit
Features:
• Low Quiescent Current (< 100 nA)
• Low Driver R_ON – 20typical 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
V_{DD 2}
NC 3
FEED 4
8 ^HRNEN
7 HORNS
6 HORNB
5 V_SS
RE46C100
2x3 DFN*
NC 1
8 HRNEN
V_DD 2 _EP 7 HORNS
NC 3 ⁹ 6 HORNB
FEED 4
5 V_SS
* Includes Exposed Thermal Pad (EP); see Table 2-1.
4 FEED
7 ^HORNS
V_DD ²
V_{SS 5}
6 _HORNB
 2009-2014 Microchip Technology Inc.
DS20002166B-page 1