The NXP MAX809JD is a precision microprocessor (µP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant degree of reliability and accuracy in ensuring the proper function of the µP when power levels fluctuate. This component is essential for applications that require a stable and reliable system reset, offering designers a compact and cost-effective solution.

Key Features

• Voltage Monitoring: The MAX809JD keeps a watchful eye on the system voltage, triggering a reset when levels drop below the preset threshold, ensuring the µP and other critical components are protected from unpredictable power conditions.
• Reset Timeout: After the power supply returns to a stable condition above the threshold, the device maintains the reset output in the active state for a predetermined period to allow the system to stabilize. This timeout period is typically 140ms, which ensures that the µP has adequate time to reset properly before resuming operation.
• Low Power Consumption: With its low supply current draw, this supervisory circuit is an excellent choice for power-sensitive applications, contributing to overall energy efficiency.
• High Threshold Accuracy: The reset threshold accuracy of the MAX809JD is ±1.5%, providing a precise control over the reset function, which is critical for systems that cannot tolerate wide variations in reset thresholds.
• Operating Temperature Range: The device is designed to operate over a wide temperature range, from -40°C to +105°C, making it suitable for use in harsh environmental conditions.
• Packaging: The MAX809JD is available in a compact SOT-23 package, which is ideal for space-constrained applications.

Applications

The NXP MAX809JD is versatile and can be used in a variety of applications, including:

• Computers and controllers
• Portable/battery-powered equipment
• Intelligent instruments
• Embedded systems
• Industrial controllers

In summary, the NXP MAX809JD is a robust and reliable solution for system reset management. Its precision and low power consumption make it an indispensable component in the design of modern digital systems where consistent performance and stability are paramount.