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ACE Technology

ACE809 Datasheet Preview

ACE809 Datasheet

3-Pin Microprocessor Reset Circuits

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ACE809                                                                                                                                                                               
                                              Technology
3-Pin Microprocessor Reset Circuits
Description
The ACE809 microprocessor supervisory circuits can be used to monitor the power supplies in
microprocessor and digital systems. They provide s reset to the microprocessor during power-up,
power-down and brown-out conditions.
The function of the ACE809 is to monitor the VCC supply voltage, and assert a reset signal whenever this
voltage declines below the factory-programmed reset threshold. The reset signal remains asserted for
240ms after VCC rises above the threshold. The ACE809 has an active-low RESET output. The output of
the ACE809 is guaranteed valid down to VCC =1V. The device is available in a SOT-23-3L package.
The ACE809 is optimized to reject fast transient glitches on the VCC line. Low supply current of 25µA,
(VCC=3.3V) makes these devices suitable for battery powered applications.
Features
Precision Vcc Monitor for 3.0V,3.3V and 5.0V Supplies
140ms Guaranteed Minimum RESET Output Duration
RESET Output Guaranteed to Vcc=1.0V
Low 25μA Supply Current.
Vcc Transient Immunity.
No External Components.
Application
Embedded systems
Computers
Critical μP Power Supply Monitoring
Battery Powered equipment
Absolute Maximum Ratings
Parameter
Supply Voltage
Output Voltage
Symbol Max Unit
VCC 5.5 V
RESET -0.3 to (Vcc+0.3) V
Input Current
20 mA
Output Current
IOUT 20 mA
Power Dissipation
PD Internally Limited
Thermal resistance junction to ambient
SOT-23-3
θJA
230 /W
Operating junction temperature range TJ
0 to 125
Storage temperature range
TSTG
-60 to 150
Note 1: Exceeding these rating could cause damage to the device. All voltages are with respect to Ground. Currents are positive
into, negative out of the specified terminal.
Note 2: Voltage values are with respect to the anode terminal unless otherwise noted.
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VER 1.2 1 




ACE Technology

ACE809 Datasheet Preview

ACE809 Datasheet

3-Pin Microprocessor Reset Circuits

No Preview Available !

 
ACE809                                                                                                                                                                               
                                              Technology
3-Pin Microprocessor Reset Circuits
Packaging Type
SOT-23-3
3
1
Pin No
1
2
3
2
Symbol
GND
RESET
Vcc
Description
Ground
RESET output remains low while Vcc is below the reset voltage threshold and for
240msec(typ.) after Vcc rises above reset threshold
Supply Voltage (typ.)
Ordering information
Selection Guide
ACE809 X XX + H
Halogen - free
Pb - free
BM: SOT-23-3
Vout Volts :
L : 4.63V
M : 4.38V
J : 4.00V
T : 3.08V
S : 2.93V
R : 2.63V 
Power Dissipation Table
Package
θJA Df(mW/)
TA25 OC
TA=70 OC
TA= 85 OC
(OC /W ) TA25Power rating(mW) Power rating(mW) Power rating (mW)
BM 230 3.5
543
348
283
Note:1.Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into
Thermal shutdown.
www.Dat2a.SThJ:eJeut4nUct.icoonmTemperature Calculation TJ = TA + ( PD x θJA )
The θJA numbers are guidelines for the thermal performance of the device/PC-board system. All of the above assume no
Ambient airflow.
3.θJA : Thermal Resistance-Junction to Ambient, DF: Derating factor, Po: Power consumption
VER 1.2 2


Part Number ACE809
Description 3-Pin Microprocessor Reset Circuits
Maker ACE Technology
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ACE809 Datasheet PDF






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