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 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
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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 VCC 5. 5 V Output Voltage 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 ℃/W 230 SOT-23-3 θJA 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. www. DataSheet4U. com
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ACE809 PDF File
