Maxim Integrated MAX6803US31D3+T Microprocessor Reset Circuit

The Maxim Integrated MAX6803US31D3+T is a compact, highly precise microprocessor (μP) supervisory circuit designed to monitor power supplies in digital systems. It provides a significant level of system reliability and accuracy required in critical applications, ensuring that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions.

This device is specifically engineered to maintain system integrity by monitoring the VCC power supply level. When the monitored VCC supply voltage drops below the factory-set reset threshold level, the MAX6803US31D3+T asserts a reset signal, holding the connected microprocessor in a reset state for a minimum of 140ms (typical) after VCC has risen above the reset threshold. This ensures that the system has sufficient time to stabilize before the processor starts operating.

Key features of the MAX6803US31D3+T include a preset VCC reset threshold voltage of 3.1V, which is ideal for 3.3V-powered systems. The device is offered in a compact SOT-23 package, making it a space-saving solution for space-constrained applications. Moreover, the low supply current of 5.5μA (typical) makes this device suitable for battery-operated equipment.

Additionally, the MAX6803US31D3+T offers an active-low, push-pull reset output. This type of output allows for a direct drive of a microprocessor reset or other logic without the need for external components, simplifying the design and reducing the overall bill of materials.

With its wide operating temperature range from -40°C to +125°C, the MAX6803US31D3+T is versatile enough to be used in various environments, from industrial to automotive applications. Its robust design and high level of precision make it an excellent choice for systems that require reliable performance and minimal downtime.

Overall, the Maxim Integrated MAX6803US31D3+T is a reliable and efficient solution for system designers looking to enhance the operational stability of their digital systems, providing peace of mind with its automatic reset functionality and low power consumption.