Maxim Integrated MAX6381XR46D3+T Microprocessor Reset Circuit

The Maxim Integrated MAX6381XR46D3+T is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a crucial function in ensuring system stability by asserting a reset signal whenever the V<sub>CC supply voltage falls below a preset threshold, maintaining it until the supply voltage stabilizes above the threshold for a precise period, known as the reset timeout period.

This device comes in a small, 3-pin SC70 package, making it ideal for space-constrained applications. The MAX6381XR46D3+T operates with a nominal threshold voltage of 4.63V, tailored for systems that run on 5V power supplies. It is suitable for a variety of digital devices including microcontrollers, computers, controllers, and intelligent instruments, providing them with enhanced protection against unpredictable power fluctuations.

Key features of the MAX6381XR46D3+T include:

• Factory-Set Reset Threshold: The reset threshold voltage is preset at the factory, eliminating the need for external components to set the threshold, which simplifies the design and reduces component count.
• Low Power Consumption: The device is designed for low power consumption, making it suitable for battery-operated applications.
• Manual Reset Input: A manual reset input is provided, allowing the reset to be triggered with an external switch or logic signal for system testing and other purposes.
• Reset Timeout: After the supply voltage rises above the reset threshold, the reset signal remains asserted for the reset timeout period, ensuring the system has adequate time to stabilize.
• High Accuracy: The reset threshold accuracy and the timeout period are precisely controlled, ensuring reliable operation across the entire operating temperature range.
• Wide Operating Temperature Range: This device is designed to operate over a broad temperature range, making it suitable for industrial applications.

With its precision voltage monitoring and low power consumption, the Maxim Integrated MAX6381XR46D3+T is an essential component for maintaining the integrity of electronic systems. Its small footprint, ease of use, and robust feature set make it an excellent choice for designers looking to enhance system reliability and performance.