Microchip MIC803-29D2VM3-TR: A Precision Voltage Supervisor with Manual Reset Control

In the realm of electronic systems, ensuring reliable operation and controlled behavior during power-up, power-down, and brownout conditions is paramount. The Microchip MIC803-29D2VM3-TR stands out as a dedicated voltage supervisor IC designed specifically for this critical task. This device integrates a precise voltage monitoring circuit with a manual reset input, offering designers a robust solution for enhancing system stability and user control.

The core function of the MIC803 is to monitor a system's primary power supply voltage (Vcc). It compares this voltage against a fixed, internal threshold. The specific part number MIC803-29D2VM3-TR features a 2.93V threshold, making it ideal for supervising 3V and 3.3V power rails commonly found in modern microcontrollers, FPGAs, and digital signal processors. When Vcc dips below this preset threshold, the chip's open-drain RESET output is assertedly driven active (low), signaling the host processor to enter a known safe state. This prevents erratic code execution and potential data corruption that can occur from undervoltage conditions.

A key differentiator of this supervisor is its manual reset (MR) capability. The inclusion of a manual reset pin allows an external switch or another logic signal from the system to forcibly activate the reset function. This provides a straightforward method for users or external circuitry to initiate a system reboot on demand, irrespective of the current supply voltage status. This feature is invaluable for debugging, testing, and ensuring a controlled startup sequence.

The device is characterized by its extremely low supply current, typically drawing only 5µA. This minimal power drain makes it perfectly suited for battery-powered and portable applications where power conservation is critical. Housed in a space-saving SOT-23-3 package, the MIC803-29D2VM3-TR offers a compact footprint for high-density PCB designs. Its operational voltage range is from 1.0V to 5.5V, providing flexibility across various system voltages.

ICGOODFIND: The Microchip MIC803-29D2VM3-TR is an excellent choice for designers seeking a simple, reliable, and low-power voltage monitoring solution. Its integration of a precise 2.93V supervisor with a manual reset input in a tiny package provides essential protection and control for a wide array of embedded systems, from consumer electronics to industrial equipment.

Keywords: Voltage Supervisor, Manual Reset, Undervoltage Protection, Low Power, SOT-23 Package.