The MAX809MUR is a compact, highly efficient microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in digital systems. It provides a significant function by asserting a reset signal to the µP during power-up, power-down, and brown-out conditions, ensuring that the µP starts in a known state.

Key Features

• Precision Monitoring: With its precise factory-trimmed threshold voltages, the MAX809MUR guarantees accurate monitoring of the system voltage.
• Low Power Consumption: The device is optimized for low power consumption, making it suitable for battery-operated applications.
• Manual Reset Input: A manual reset input is provided, allowing the system to be reset with an external pushbutton or logic signal.
• Reset Timeout: It offers a 140ms (min) reset timeout period, ensuring the system has adequate time to stabilize before the µP begins operation.
• Operating Temperature Range: The device operates over a wide temperature range, from -40°C to +85°C, accommodating various environmental conditions.

Applications

The MAX809MUR is suitable for a broad range of applications, including:

• Computers and Controllers
• Portable/Battery-Powered Equipment
• Embedded Systems
• Intelligent Instruments
• Automotive Systems

Package and Availability

The device is available in a compact SOT-23 package, which is ideal for space-constrained applications. The MAX809MUR's small footprint and low profile make it an excellent choice for portable devices.

Conclusion

In conclusion, the MAX809MUR from Maxim Integrated is a reliable and essential component for any system requiring vigilant voltage monitoring to safeguard against improper operation due to power supply inconsistencies. Its integration into a system design ensures that the digital system operates reliably and efficiently, with additional features that contribute to a robust power management strategy.