Microchip MIC803-29D2VC3-TR: A Precision 2.93V Voltage Supervisor with Manual Reset

In the realm of electronic systems, ensuring reliable and predictable operation is paramount. Voltage supervisors, or reset circuits, play a critical role in this by monitoring the power supply and holding a microprocessor in a known state until the system voltage has stabilized at the correct level. The Microchip MIC803-29D2VC3-TR stands out as a highly specialized and robust solution, integrating a precise 2.93V voltage threshold with a manual reset input in an ultra-compact package.

This device is engineered to monitor voltages for systems powered by 3V or 3.3V rails. Its core function is to assert a reset signal whenever the VCC supply voltage drops below the factory-set 2.93V threshold. This precision ensures that microcontrollers and other critical logic are only active when the supply voltage is sufficient for guaranteed operation, thereby preventing erratic behavior, data corruption, or unintended code execution during power-up, power-down, or brownout conditions.

A defining feature of the MIC803-29D2VC3-TR is its manual reset (MR) input. This active-low pin allows an external button or a signal from another part of the system to force a processor reset on demand. This is an invaluable feature for debugging, system testing, or providing end-users with a straightforward way to reboot the device without cycling power. The manual reset function is debounced, ensuring a single, clean reset pulse is generated from what might be a noisy mechanical switch press.

The device offers a push-pull, active-low reset output, which is asserted when VCC is below the threshold or when the manual reset pin is pulled low. Housed in a space-saving SOT-23-3 package, it is ideal for applications where board real estate is at a premium. Furthermore, it boasts an extremely low supply current, typically drawing just 7µA, making it perfectly suited for battery-powered and low-power portable electronics.

Typical applications are vast and include:

Portable and Battery-Powered Devices: Smart meters, medical sensors, and handheld instruments.

Embedded Systems and Microcontroller Boards: Ensuring safe startup and operation.

Automotive Electronics: Monitoring subsystems where reliable reset is non-negotiable.

Industrial Control Systems: Providing a manual reset for safety and control.

ICGOODFIND: The Microchip MIC803-29D2VC3-TR is an exceptional choice for designers seeking a highly reliable, compact, and feature-specific voltage monitoring solution. Its combination of a precise 2.93V threshold, manual reset capability, and minimal power consumption makes it an indispensable component for enhancing the robustness and user interface of modern 3V-based electronic products.

Keywords: Voltage Supervisor, Manual Reset, 2.93V Threshold, Low Power Consumption, SOT-23 Package.