The MIC811TUY is a voltage supervisory circuit manufactured by Micrel (now Microchip Technology). It monitors the power supply voltage and provides a reset signal when the voltage falls below a certain threshold, preventing erratic operation of microprocessors and other digital circuits.

Applications

• Microprocessor Systems
• Microcontroller Systems
• Embedded Systems
• Power Management Circuits
• Battery-Powered Devices

Features

• Precision Voltage Monitoring: Accurately monitors the input voltage.
• Factory-Set Reset Threshold: Predetermined voltage level that triggers the reset signal.
• Active-Low Reset Output: Provides a low-level signal during a reset condition.
• Open-Drain Output: Allows for flexible connection to other circuits.
• Small Package: Available in compact packages like SOT-23 or similar.

Benefits

• Prevents Data Corruption: Ensures that microprocessors start in a known state, preventing data corruption during power-up or brown-out conditions.
• Improves System Reliability: Enhances the overall stability and reliability of the system by preventing erratic operation due to voltage fluctuations.
• Simplified Design: Simplifies power supply monitoring and reset circuit design.
• Cost-Effective Solution: Provides a low-cost and reliable voltage monitoring solution.
• Protection Against Brown-Outs: Prevents system malfunctions caused by voltage dips.

Additional Details

The MIC811TUY operates by comparing the input voltage to an internal reference voltage. If the input voltage falls below the threshold, the reset output is asserted (pulled low). The reset output remains asserted for a specified reset timeout period after the voltage rises above the threshold, ensuring that the microprocessor has sufficient time to stabilize.

The specific reset threshold voltage is determined by the part number suffix. The package type is often SOT-23 or similar. Refer to the Micrel (Microchip) datasheet for detailed specifications, including threshold voltages, reset timeout periods, operating temperature range, and package dimensions.