Microchip MIC811TUY-TR: Ultra-Low-Power μP Supervisor with Manual Reset

In the realm of embedded systems and portable electronics, ensuring a processor starts correctly and remains operational under unpredictable power conditions is paramount. The Microchip MIC811TUY-TR addresses this critical need as a highly integrated, ultra-low-power microprocessor (μP) supervisor with a manual reset input. This device is engineered to monitor system power supplies and provide a reliable reset signal to the host microcontroller or processor, thereby guaranteeing stable and predictable operation.

The core function of the MIC811TUY-TR is to monitor the VCC supply voltage of the system. When the voltage dips below a predefined threshold, typically 1.8V, the device asserts a reset signal to the μP, preventing it from operating with insufficient voltage, which can lead to erratic behavior or data corruption. This feature is crucial for systems operating in environments with fluctuating power, such as battery-powered devices. Once VCC rises back above the threshold voltage and remains stable for a preset delay period (typically 280ms), the reset signal is de-asserted, allowing the processor to begin execution in a known, valid state.

A defining characteristic of this supervisor IC is its ultra-low power consumption. The device operates on a mere 3.5μA (typical) of supply current, making it an ideal choice for power-sensitive applications like wireless sensors, medical implants, smart meters, and other battery-powered equipment where every microamp counts for extending operational life.

Beyond its automatic voltage monitoring, the MIC811TUY-TR incorporates a manual reset (MR) input. This active-low input allows a physical button or a logic signal from another part of the system to force a processor reset on demand. This is invaluable for system debugging, user-initiated reboots, or ensuring a complete restart from a known state without cycling the main power.

Housed in a space-saving SOT-23-5 package, the MIC811TUY-TR offers a compact footprint suitable for densely populated PCBs. Its wide operating voltage range and high noise immunity further enhance its reliability in electrically noisy environments.

ICGOOODFIND: The Microchip MIC811TUY-TR stands out as an exceptionally efficient and reliable solution for system monitoring. Its combination of ultra-low quiescent current, precise voltage monitoring, and manual reset capability in a miniature package makes it an indispensable component for designers striving to maximize reliability and battery life in modern electronic products.

Keywords: Ultra-Low-Power, Voltage Supervisor, Manual Reset, Microprocessor Supervisor, Battery-Powered Devices.