The MIC803-44D2VM3TR is a voltage supervisory circuit manufactured by Micrel (now Microchip Technology). This device is designed to monitor the voltage level of a power supply and provide a reset signal to a microcontroller or other digital circuit if the voltage falls below a specified threshold. It is commonly used to prevent data corruption and ensure proper system operation during power-up or brownout conditions.

Applications

• Microcontroller reset circuits
• Voltage monitoring
• Power-on reset circuits
• Battery monitoring
• System voltage supervision

Features

• Precision voltage monitoring
• Active-low reset output
• Small package size
• Low supply current
• Fixed threshold voltage

Benefits

• Ensured proper microcontroller operation during power-up and brownout conditions, preventing erratic behavior.
• Protection against data corruption by holding the microcontroller in reset state until the voltage stabilizes.
• Simplified system design due to its precision voltage monitoring and integrated functionality.
• Extended battery life in portable devices due to its low supply current consumption.
• Minimized board space requirements because of its small package.

Technical Specifications

The MIC803-44D2VM3TR typically has a threshold voltage of 4.38V. The reset timeout period is typically 140ms. The supply voltage range is 1.6V to 5.5V. The reset output is active-low. It comes in a SOT-23 package. The operating temperature range is typically -40°C to +85°C.