The MIC803-31D4VM3 is a voltage monitoring circuit or voltage supervisor manufactured by Micrel, now part of Microchip Technology. It is designed to monitor the voltage level of a power supply and provide a reset signal to a microcontroller or other digital system if the voltage falls below a specified threshold. This ensures that the system starts up and operates correctly, preventing data corruption and other malfunctions.
Applications:
- Microcontroller-Based Systems: Used in embedded systems to monitor the power supply voltage of the microcontroller.
- FPGA and DSP Applications: Provides power-on reset and voltage monitoring for FPGAs and DSPs.
- Memory Systems: Protects memory devices from data corruption due to undervoltage conditions.
- Industrial Control Systems: Ensures reliable operation of industrial control equipment.
- Automotive Electronics: Implemented in automotive electronic systems for power supply monitoring.
Features:
- Precision Voltage Monitoring: Accurately monitors the power supply voltage.
- Fixed Threshold Voltage: The MIC803-31D4VM3 has a fixed threshold voltage of 3.08V.
- Open-Drain Output: Requires a pull-up resistor for proper operation.
- Active-Low Reset Output: The reset output is asserted low when the voltage drops below the threshold.
- Small Package Size: Available in a small SOT-23 package.
- Low Supply Current: Consumes very little power.
Benefits:
- Reliable System Startup: Ensures that the system starts up correctly after a power failure or brownout.
- Data Corruption Prevention: Protects memory devices from data corruption due to undervoltage conditions.
- Simplified System Design: Reduces the need for external components.
- Robust System Operation: Provides reliable operation even in harsh environments.
- Low Power Consumption: Minimizes power consumption in battery-powered applications.
Additional Details:
The MIC803-31D4VM3 is available in a SOT-23 package. It operates from a supply voltage range of 1.6V to 5.5V. The reset output remains asserted for a specified reset timeout period after the voltage rises above the threshold.
The device is simple to use, requiring only a pull-up resistor on the reset output and a bypass capacitor on the supply voltage pin.
