Maxim Integrated MXD1811UR41+T Microprocessor Supervisory Circuit

The MXD1811UR41+T is a highly reliable and efficient microprocessor (µP) supervisory circuit designed and manufactured by Maxim Integrated, a trusted name in the development of innovative analog and mixed-signal products. This component is engineered to monitor the power supplies in µP and digital systems, providing a significant layer of protection by ensuring that the system's voltage levels remain within operational thresholds.

With its compact SOT-23 packaging, the MXD1811UR41+T is ideal for space-constrained applications. It offers a precise factory-trimmed V<sub>CC reset threshold of 4.1V, providing a robust solution for systems that operate at 5V power supply levels. The device ensures that the µP boots up in a known state, by asserting a reset signal whenever the V<sub>CC supply voltage drops below the 4.1V threshold. The reset output remains asserted for a period of at least 140ms after V<sub>CC has risen above the reset threshold, allowing the power supply and processor to stabilize before normal operation commences.

Among its features, the MXD1811UR41+T offers a low supply current of only 1.2µA, making it an energy-efficient choice for battery-operated devices. The device's open-drain reset output allows for a simple interfacing with other logic components, and it is guaranteed to be in the correct state for V<sub>CC down to 1V, which is particularly useful in low voltage conditions.

Designed for high reliability, the MXD1811UR41+T operates over a wide temperature range of -40°C to +125°C, making it suitable for use in a variety of industrial and automotive environments where extreme temperatures are common. The device's active-low reset output ensures compatibility with most µP and microcontroller (MCU) designs, simplifying integration into existing systems.

In summary, the Maxim Integrated MXD1811UR41+T is a versatile and efficient supervisory circuit that offers crucial monitoring of power supply levels in digital systems, ensuring proper system reset and reliable operation. Its low power consumption, precision voltage monitoring, and wide operating temperature range make it an excellent choice for designers looking to enhance system stability and robustness.