The MAX6424UK21 is a compact, high-precision microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a robust solution to ensure that microprocessors and other sensitive digital systems reset to a known state during power-up, power-down, or brown-out conditions.

Key Features

• Reset Threshold Voltage: The device has a preset reset threshold voltage of 2.1V, which is ideal for monitoring 2.5V power supplies and other low voltage applications.
• Low Power Consumption: With its ultra-low supply current of only 1.2µA, the MAX6424UK21 is highly energy-efficient, making it suitable for battery-operated devices.
• Manual Reset Input: A manual reset input allows the user to trigger a reset pulse manually, providing additional system control.
• High Accuracy: This supervisory circuit offers high reset threshold accuracy of ±1.5%, ensuring reliable operation under varying conditions and across temperature extremes.
• Immune to Short Vcc Transients: The MAX6424UK21 is designed to be immune to short-duration power supply transients, preventing unnecessary resets due to noise and brief voltage dips.

Applications

The MAX6424UK21 is versatile and can be used in a wide range of applications, including:

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

Package and Temperature Range

The device comes in a small SOT23-5 package, which is suitable for space-constrained applications. It operates over the automotive temperature range of -40°C to +125°C, allowing for deployment in harsh environments.

Conclusion

With its precise monitoring, low power consumption, and versatile applications, the MAX6424UK21 from Maxim Integrated is an excellent choice for system designers looking to enhance the reliability and performance of their digital systems. Its robust feature set ensures that devices operate correctly and safely in a variety of conditions and use cases.