Microchip Technology MIC811SUY Voltage Supervisor

The MIC811SUY from Microchip Technology is a highly reliable voltage supervisor designed to monitor power supplies in microprocessor systems. It provides a crucial function by asserting a reset signal whenever the V<sub>CC supply voltage drops below a predetermined threshold, ensuring the proper operation of microprocessor systems by preventing code execution errors during power-up, power-down, or brown-out conditions.

This device comes in a compact SOT-143 package, making it an ideal choice for space-constrained applications. The MIC811SUY offers a variety of features that make it a versatile and essential component for any system requiring voltage supervision. The reset output remains asserted for a minimum of 140ms after V<sub>CC has risen above the reset threshold, providing ample time for the system to stabilize before the processor begins execution.

One of the key attributes of the MIC811SUY is its precision monitoring of 3V, 3.3V, and 5V supply voltages with a threshold accuracy of ±2.5%. This precision ensures that systems are protected from unpredictable voltage fluctuations that could otherwise lead to system failure or data corruption. Additionally, the device has a low supply current of 1.5µA, which is particularly beneficial for battery-operated devices where power efficiency is critical.

The MIC811SUY also features an active-low reset output, which is compatible with most microprocessors and can be directly connected without the need for external components. Its open-drain output allows for OR'ing of multiple supervisors for monitoring different voltages or for redundancy, enhancing the reliability of the system it is monitoring.

In summary, the MIC811SUY is an essential component for any system requiring reliable voltage monitoring. Its small size, low power consumption, and high accuracy make it an excellent choice for a wide range of applications including computers, embedded systems, and portable devices.