The Microchip MIC803-40D2VC3-TR: Precision Voltage Supervision with Manual Control

In the realm of electronic systems, ensuring stable and reliable operation is paramount. Voltage supervisors, or reset circuits, serve as the guardians of this stability, meticulously monitoring the power supply to prevent microprocessors and other critical ICs from operating under out-of-spec conditions. The Microchip MIC803-40D2VC3-TR stands out as a highly integrated and robust solution, combining automatic voltage monitoring with a crucial manual reset input in an ultra-compact package.

This specific device is engineered to monitor a 4.0V power supply. Its core function is to assert a reset signal whenever the VCC supply voltage drops below a predefined threshold, ensuring the connected microcontroller enters a known safe state and preventing erratic code execution. The MIC803-40D2VC3-TR is characterized by its extremely low power consumption, drawing a mere 5.5µA of supply current, making it an ideal choice for battery-powered and energy-sensitive applications.

A defining feature of this voltage supervisor is its manual reset input (MR). This active-low pin allows an external switch, a logic signal, or another circuit in the system to forcibly assert the reset signal, regardless of the state of the VCC voltage. This provides system designers with a powerful tool for initiating a controlled system reboot on demand, which is invaluable for debugging, user-initiated resets, or ensuring a clean startup sequence.

The device offers a push-pull, active-low reset output that is guaranteed to be in the correct state down to VCC = 1V, enhancing system reliability even during a catastrophic power failure. Housed in a space-saving SOT-23-3 package, the MIC803-40D2VC3-TR provides a simple, yet complete reset solution for a wide array of applications, including embedded systems, automotive electronics, industrial controls, and portable instrumentation.

ICGOOODFIND: The Microchip MIC803-40D2VC3-TR is an excellent choice for designers seeking a reliable, low-power voltage supervisor. Its integration of precise 4.0V monitoring, a manual reset capability, and a guaranteed reset output down to 1V into a miniature package makes it a versatile and robust component for enhancing system stability and control.

Keywords: Voltage Supervisor, Manual Reset (MR), 4.0V Threshold, Low Power Consumption, SOT-23 Package.