Maxim Integrated MAX823MEUK Microprocessor Supervisory Circuit

The Maxim Integrated MAX823MEUK is a compact, highly reliable supervisory circuit designed to monitor power supplies in microprocessor systems. It provides a significant layer of protection by ensuring that the microprocessor and other critical system components operate within the specified power supply parameters. This microelectronic device is a crucial component for applications that demand consistent and accurate system monitoring.

At the heart of the MAX823MEUK supervisory circuit is its ability to assert a reset signal to the microprocessor whenever the VCC supply voltage falls below a predetermined threshold, known as the reset voltage threshold. This ensures that the system resets in a controlled manner during power-up, power-down, and brown-out conditions. The reset output remains asserted for a period after VCC has risen above the reset threshold, providing a guaranteed reset signal duration, which is crucial for proper system recovery.

The MAX823MEUK comes in a compact SOT-23 package, making it an ideal choice for space-constrained applications. It operates over a wide voltage range and features low supply current, which helps in reducing the overall power consumption of the system. Its key features include:

• Precision Monitoring: Accurate monitoring of the power supply with a factory-trimmed reset threshold voltage.
• Low Power Consumption: The device consumes minimal power, making it suitable for portable and battery-operated applications.
• Guaranteed Reset: It provides a guaranteed reset valid to VCC = 1V, ensuring reliable system reset.
• Manual Reset: A manual reset input allows for a user or external microcontroller to initiate a system reset.
• High Threshold Accuracy: The reset threshold accuracy is maintained over the entire temperature range, providing consistent performance.
• Immunity to Short VCC Transients: The device includes circuitry to ignore brief drops in VCC, which prevents false triggering of the reset signal.

The MAX823MEUK is ideal for a wide range of applications, including computers, controllers, intelligent instruments, portable/battery-powered equipment, and embedded systems. Its robust feature set ensures that it can handle the rigorous demands of maintaining system integrity and preventing data loss during power supply fluctuations.

For designers looking for a reliable supervisory solution, the Maxim Integrated MAX823MEUK offers a blend of precision, low power consumption, and compact form factor, making it a top choice in the industry.