Maxim Integrated MAX802SCSA+ Supervisory Circuit

The MAX802SCSA+ from Maxim Integrated is a highly reliable supervisory circuit designed to monitor power supplies in microprocessor (µP) and digital systems. It provides a significant layer of protection by ensuring that the µP boots up in a predictable state every time. This supervisory circuit is an essential component for systems that require a high degree of operational stability and accuracy.

This device is particularly well-suited for portable, battery-powered applications due to its low power consumption. The MAX802SCSA+ helps to prevent code execution errors during power-up, power-down, and brownout conditions by resetting the µP until the system voltage reaches a stable and acceptable level. It also monitors the power supply voltage and keeps the µP in reset mode for a minimum of 140ms after the supply has reached the valid threshold. This ensures that the µP starts up cleanly every time.

The MAX802SCSA+ operates over a wide voltage range and offers several key features, including:

• A precise factory-trimmed threshold voltage for accurate monitoring
• Low power consumption, making it ideal for energy-sensitive applications
• A manual reset input, allowing for a reset to be triggered with an external signal
• An active-low reset output, which remains low when the monitored voltage is below the reset threshold
• Thermal shutdown protection to safeguard the device and the system it monitors

Available in a compact 8-pin SOIC package, the MAX802SCSA+ is easy to integrate into existing designs, offering a compact and efficient solution for system monitoring. Whether used in computers, controllers, intelligent instruments, or portable consumer products, this supervisory circuit helps to enhance system reliability and prevent data corruption by ensuring that all operations commence from a clean state.

With its combination of low power consumption, precision voltage monitoring, and robust reset features, the Maxim Integrated MAX802SCSA+ is an indispensable component for designers looking to enhance the operational stability of their digital systems.