Maxim Integrated MAX6863UK19+T Microprocessor Reset Circuit

The MAX6863UK19+T is a highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. This device ensures that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. The compact and efficient design makes it an ideal solution for portable electronics, such as PDAs, laptops, and smartphones, as well as for embedded systems, networking equipment, and other microprocessor-based applications.

This supervisory circuit operates over a wide voltage range and is specifically designed to maintain system integrity by monitoring the system voltage. When the monitored voltage drops below the factory-set reset threshold level, the MAX6863UK19+T asserts a reset signal to prevent system errors. The reset output remains asserted for a preset timeout period after the voltage rises above the reset threshold, ensuring the system has adequate time to stabilize.

The MAX6863UK19+T features a reset threshold voltage of 1.9V, tailored for systems that operate at lower voltages. It offers a reset timeout period of 140ms (min), providing a sufficient delay for most microprocessors to initialize properly during power-up. This device comes in a small SOT-23 package, which is highly beneficial for space-constrained applications.

Key features of the MAX6863UK19+T include:

• Compact SOT-23 packaging for space-saving applications
• Low supply current of 6µA (typical), which is ideal for battery-powered devices
• Factory-set reset threshold voltage of 1.9V suitable for low voltage systems
• Manual reset input for system-level reset control
• Immune to short VCC transients

Maxim Integrated's commitment to quality and reliability is evident in the MAX6863UK19+T, making it a trusted choice for system designers looking to enhance the operational stability of their digital systems. By providing a precise and reliable reset signal, this supervisory circuit helps to prevent system errors and data corruption during adverse power conditions, thereby improving overall system reliability.