ACE809 Datasheet, PDF (1/6 Pages) ACE Technology Co., LTD. – 3-Pin Microprocessor Reset Circuits

Technology
ACE809
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 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
• 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
Output Voltage
V_CC
5.5
V
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
SOT-23-3
θ_JA
230
℃/W
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.
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