The MAX809RD is a microprocessor (µP) supervisory circuit designed by NXP Semiconductors to monitor the power supplies in µP and digital systems. It provides a significant level of protection for your electronic devices by ensuring that the system's voltage levels remain within operational limits. It's an essential component for any design that requires reliable operation over a range of conditions.

Key Features

• Precision Monitoring: With its ability to accurately monitor 3V, 3.3V, and 5V power supplies, the MAX809RD is versatile and ensures that your system operates under optimal power conditions.
• Reset Output: This device has an active-low reset output, which provides a clear signal to the µP whenever the monitored power supply falls below the factory-set reset threshold. The reset signal remains active until the power supply voltage returns to acceptable levels and stabilizes.
• Low Power Consumption: Designed for power-sensitive applications, the MAX809RD consumes low power, which makes it an ideal choice for portable and battery-operated equipment.
• Manual Reset: A manual reset feature allows for a reset to be asserted at any time by the user, providing additional control and safety mechanisms.
• Compact SOT-23 Packaging: The small size of the SOT-23 package makes it easy to integrate into space-constrained designs without sacrificing performance or functionality.

Applications

The MAX809RD is suitable for a wide range of applications where reliable voltage monitoring is critical. It is commonly used in:

• Computers and Servers
• Embedded Systems
• Portable/Battery-Powered Devices
• Intelligent Instruments
• Industrial Controllers

Technical Specifications

The device features a factory-trimmed reset threshold, ensuring accurate detection of under-voltage conditions. It also boasts a reset timeout period that provides a delay before the reset signal is issued, allowing the system to stabilize.

Conclusion

The MAX809RD from NXP Semiconductors is a robust and reliable solution for system voltage monitoring. Its precision, low power consumption, and compact size make it an excellent choice for a variety of applications that require stringent power management. By ensuring that your systems operate within their intended voltage ranges, the MAX809RD helps to prevent data corruption, erratic operation, and potential hardware damage.