Microchip MIC803-31D3VM3-TR: A Precision 3.08V Voltage Supervisor with Manual Reset

In the realm of electronic systems, ensuring reliable and controlled operation is paramount. The Microchip MIC803-31D3VM3-TR stands out as a critical component designed specifically for this purpose. This voltage supervisor, or microprocessor reset circuit, provides a robust solution for monitoring power supply voltages and guaranteeing that a microcontroller or DSP starts and operates only under valid conditions.

The core function of this device is to monitor a 3.08V power supply rail. When the supply voltage (VCC) dips below this precise threshold, the chip asserts a reset signal. This prevents the downstream processor from executing instructions erratically due to insufficient voltage, a common cause of system failure and data corruption. The MIC803-31D3VM3-TR is characterized by its extremely low supply current, typically drawing just 5µA, making it an ideal choice for battery-powered and power-sensitive portable applications.

A key differentiating feature of this supervisor is its manual reset input (MR). This active-low pin allows an external switch, a system command from another IC, or a test signal to force a reset command independently of the VCC voltage. This provides system designers with flexible control over the reset state, enabling features like user-initiated reboots, safe shutdown sequences, or enhanced system debugging capabilities.

Housed in a space-saving SOT-23-3 package, the device offers a simple yet effective solution with an open-drain reset output. This output architecture allows for easy interfacing with other devices and enables the use of pull-up resistors to different voltage levels if needed. Its industrial temperature range ensures reliability across various environmental conditions.

ICGOOODFIND: The Microchip MIC803-31D3VM3-TR is an excellent choice for designers seeking a low-power, high-reliability voltage monitoring solution with the added flexibility of a manual reset capability. Its precision, minimal footprint, and functional robustness make it perfectly suited for a wide array of embedded systems, from consumer electronics to industrial control modules.

Keywords: Voltage Supervisor, Manual Reset, 3.08V Threshold, Low Power, Microprocessor Reset.