The MIC803-44D4VM3 is a voltage supervisor manufactured by Micrel (now Microchip Technology). It's designed to monitor the power supply voltage of a system and provide a reset signal when the voltage drops below a certain threshold, preventing erratic behavior and data corruption.
Applications:
- Microprocessor and Microcontroller Systems
- Memory Systems
- Power Supply Monitoring
- Critical System Monitoring
- Portable Devices
Features:
- Precision Voltage Monitoring
- Factory Set Thresholds (e.g., 4.4V in this case)
- Active-Low Reset Output
- Open-Drain Output
- Small Package Size (e.g., SOT-23)
- Low Supply Current
- Immunity to Transient Voltages
Benefits:
- Prevents system malfunctions due to low voltage
- Ensures reliable system operation
- Simple to implement with minimal external components
- Space-saving design suitable for portable devices
- Low power consumption minimizes impact on battery life
- Protects data integrity
Additional Details:
The MIC803-44D4VM3 monitors the input voltage and asserts the reset output (active low) when the voltage falls below its preset threshold of 4.4V. The reset output remains asserted for a certain timeout period after the voltage rises above the threshold, ensuring that the system has enough time to initialize properly. Because it has an open-drain output, a pull-up resistor is required. The SOT-23 package makes it easy to integrate into tight board layouts. Specific timing characteristics and component selection guidelines can be found in the device's datasheet.
