Ensuring System Integrity with the MIC803-30D2VC3-TR Voltage Supervisor

In the realm of electronic system design, maintaining operational stability and ensuring a controlled startup sequence are paramount. The Microchip MIC803-30D2VC3-TR is a dedicated voltage supervisor, or microprocessor reset IC, engineered to provide this critical functionality with high precision and added flexibility. This device continuously monitors the system's power supply voltage and asserts a reset signal to the microcontroller (MCU) or processor whenever the voltage dips below a predefined threshold, preventing erratic code execution and data corruption.

A key feature of this supervisor is its fixed 3.0V threshold voltage, denoted by the `-30` in its part number. This makes it an ideal guardian for 3.0V and 3.3V systems, ensuring the connected processor remains in a safe reset state until the power rail has stabilized at a valid level. The device offers an active-low, open-drain reset output, which provides design flexibility by allowing the use of an external pull-up resistor to any voltage rail up to 5.5V, facilitating easy interfacing with logic operating at different voltages.

Beyond its core monitoring function, the MIC803-30D2VC3-TR integrates a manual reset input (MR). This allows a system designer, technician, or end-user to forcibly initiate a system reset via a push-button switch. This manual override is invaluable for debugging, testing, and recovering from software lock-ups without the need to cycle the main power. The inclusion of this feature consolidates two functions into a single, tiny SOT-23-5 package, saving valuable board space.

The device is characterized by its extremely low supply current, typically drawing just 5.5 µA, making it highly suitable for battery-powered and power-sensitive applications. Its robust design ensures reliable operation across a wide temperature range.

ICGOO In summary, the MIC803-30D2VC3-TR from Microchip is a highly reliable and efficient solution for power management. Its combination of precise voltage monitoring, manual reset capability, and low power consumption makes it an essential component for enhancing the reliability and user interface of a wide array of embedded systems.

Keywords: Voltage Supervisor, Manual Reset, Microprocessor Reset IC, Open-Drain Output, Low Power Consumption.