Maxim Integrated's MAX6390XS29D4 Microprocessor Reset Circuit

The MAX6390XS29D4 from Maxim Integrated is a compact, high-precision microprocessor (µP) reset circuit designed to monitor supply voltages in digital systems. It provides a robust solution for systems that require reliable operation, protecting against unpredictable conditions such as power supply transients, brownouts, and system failures.

Key Features

• Voltage Monitoring Precision: The device offers a precise monitoring threshold voltage of 2.925V, ensuring accurate detection of undervoltage conditions.
• Low Power Consumption: With its low quiescent current draw, the MAX6390XS29D4 is suitable for power-sensitive applications, contributing to overall energy efficiency.
• Manual Reset Input: An external manual reset input allows for a system reset to be triggered manually, providing additional control and flexibility.
• Reset Timeout: It features a fixed reset timeout duration of 280ms (min), which ensures that the system has sufficient time to stabilize before normal operation resumes.
• Package Options: The device is available in a small, 4-pin SC70 package, making it ideal for space-constrained applications.
• Operating Temperature Range: It operates over an extended temperature range of -40°C to +125°C, suitable for industrial and automotive environments.

Applications

The MAX6390XS29D4 is designed for a broad range of applications where reliable voltage monitoring is critical. It is commonly used in:

• Portable/Battery-Powered Equipment
• Computers and Servers
• Embedded Systems
• Data Storage Systems
• Industrial Controllers
• Automotive Systems

Robust Protection

This reset circuit provides an active-low reset output, which remains asserted for the reset timeout period after the monitored voltage rises above the reset threshold. This ensures a clean reset signal to the µP, safeguarding system integrity during power-up, power-down, and brownout conditions.

The MAX6390XS29D4 is a testament to Maxim Integrated's commitment to delivering high-quality, reliable integrated circuits that meet the stringent demands of modern electronic systems.