ACE809
Technology
Description
3-Pin Microprocessor Reset Circuits
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 V
CC
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 V
CC
rises above the threshold. The ACE809 has an active-low RESET output. The output of
the ACE809 is guaranteed valid down to V
CC
=1V. The device is available in a SOT-23-3L package.
The ACE809 is optimized to reject fast transient glitches on the V
CC
line. Low supply current of 25µA,
(V
CC
=3.3V) makes these devices suitable for battery powered applications.
Features
•
•
•
•
•
•
•
•
•
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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
Symbol
Max
Unit
Supply Voltage
V
CC
5.5
V
Output Voltage
RESET -0.3 to (Vcc+0.3) V
Input Current
20
mA
Output Current
I
OUT
20
mA
Power Dissipation
P
D
Internally Limited
Thermal resistance junction to ambient
℃/W
230
SOT-23-3
θ
JA
Operating junction temperature range
T
J
0 to 125
℃
Storage temperature range
T
STG
-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.
VER 1.2
1
ACE [ ACE TECHNOLOGY CO., LTD. ]
