R&E International
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.
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
Applications
Smoke detectors
CO Detectors
Personal Security Products
Electronic Toys
Pin Configuration
REGSEL
VDD
REGOUT
FEED
1
8
HRNEN
HORNS
HORNB
VSS
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
Telephone 610.992.0727
Page 1 of 4
Facsimile 610.992.0734
This datasheet contains PROPRIETARY information.
E-mail: rande@randeint.com
DS-RE46C108-011507
RE46C108
Piezoelectric Horn Driver and Voltage Regulator
Product Specification
R&E International
Electrical Characteristics at TA = 25°C, VDD = 9V, Vss = 0V (unless otherwise noted).
Parameter
Supply Voltage
Standby Supply
Current
Input Leakage
Test
Pin
Vdd
Vdd
Hrnen,Resel
FEED
FEED
Test Conditions
Operating
Hrnen=Vss; No Loads
Vin=Vdd or Vss
Feed = +22V
Feed = -10V
Limits
Min Typ Max
6.0
9.0
13.8
4
-100
20
-50
-15
1.0
2.3
100
50
Units
V
uA
nA
uA
uA
V
V
Input Voltage Low
Input Voltage High
Output Low Voltage
Output High Voltage
Regulator Voltage
Hrnen,
Regsel
Hrnen,
Regsel
Horns or
Hornb
Horns or
Hornb
Regout
Regout
Regout
Vdd
Regout
Regout
Iout=16mA; Vdd=9V
Vdd=7.2V
Iout=-16mA; Vdd=9V
Vdd=7.2V
Iout<50mA; Regsel=Vdd
Iout<50mA; Regsel=Vss
T
A
=-40 to 85°C
See note #3
6V<Vdd<12V; No load
0mA<Iout<20mA
Regsel=Vdd or Vss
Falling edge of Vdd
Vdd=4.5V; Regout=2V
Regsel=Vdd; Iout > 1mA
Regsel=Vss; Iout > 1mA
8.5
6.3
4.75
3.10
0.3
8.7
5.0
3.3
30
100
5.0
25
6.0
4.0
0.5
0.9
V
V
V
V
V
V
mV
mV
V
mA
5.25
3.50
Line Regulation
Load Regulation
Brown-Out Threshold
Voltage
*See note #1
Brown-Out Pull Down
Current
Regout Overvoltage
Clamp
*See note #2
Notes:
4.5
15
5.5
3.7
5.5
6.5
4.3
V
V
1/ The brown-out threshold voltage is the Vdd voltage at which the regulator will be disabled and Regout
will be pulled to Vss.
2/ In normal operation, the regulator will provide high-side current of up to 20mA, but current sinking
capability is typically under 1uA. The overvoltage clamp is intended to limit the voltage at Regout when it
is pulled up by an external source.
3/ The limits shown are 100% tested at 25C only. Test limits are guard-banded based on temperature
characterization to guarantee compliance at temperature extremes.
Telephone 610.992.0727
Page 2 of 4
Facsimile 610.992.0734
This datasheet contains PROPRIETARY information.
E-mail: rande@randeint.com
DS-RE46C108-011507
RE46C108
Piezoelectric Horn Driver and Voltage Regulator
Product Specification
R&E International
Typical Application
Functional Block Diagram
VDD
2
Bandgap
Reference
3
REGOUT
REGSEL
1
Output
Adjust
Clamp &
Shutdown
Circuit
4
FEED
HRNEN
8
7
HORNS
VSS
5
6
HORNB
Telephone 610.992.0727
Page 3 of 4
Facsimile 610.992.0734
This datasheet contains PROPRIETARY information.
E-mail: rande@randeint.com
DS-RE46C108-011507
RE46C108
Piezoelectric Horn Driver and Voltage Regulator
Product Specification
R&E International
R&E INTERNATIONAL, Inc.
reserves the right to make changes without further notice to any
products herein to improve reliability, function or design.
R&E INTERNATIONAL, Inc.
does not assume any liability arising out of the application or use of any product or circuit described
herein; neither does it convey any license under its patent rights, nor the rights of others.
R&E INTERNATIONAL, Inc.
products are not authorized for use as critical components in life support devices or systems without
the express written approval of the President of
R&E INTERNATIONAL, Inc.
Life support devices or systems are devices or
systems which are intended for surgical implant into the body to support or sustain life, and whose failure to perform, when properly
used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to
the user. A critical component is any component of a life support device or system whose failure to perform can be reasonably
expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
Telephone 610.992.0727
Page 4 of 4
Facsimile 610.992.0734
This datasheet contains PROPRIETARY information.
E-mail: rande@randeint.com
DS-RE46C108-011507
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