Maxim Integrated's MAX802LCPA Microprocessor Supervisory Circuit

The MAX802LCPA from Maxim Integrated is a highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used with +5V-powered circuits.

This supervisory circuit is specifically engineered to keep µP-based systems safer by monitoring the power supply voltage. In the event of a power failure or an unexpected dip below the preset threshold, the MAX802LCPA asserts a reset signal to prevent the µP from executing erroneous instructions. This reset signal remains asserted for a minimum of 150ms after the power supply has returned to an acceptable level, ensuring proper system reset and stabilization.

The MAX802LCPA features a 4.65V threshold, which is ideal for 5V power supply applications. It comes in an 8-pin DIP package, making it easy to integrate into a variety of digital systems. The device boasts a low supply current of only 40µA, which makes it suitable for power-sensitive applications.

Key features of the MAX802LCPA include:

• 4.65V ±2% Reset Threshold Suitable for 5V-Powered Circuits
• Minimum 150ms Reset Pulse Width
• Low 40µA Supply Current
• Debounced TTL/CMOS-Compatible Manual-Reset Input
• Reset Output Available in Active-High, Active-Low, and Open-Drain Configurations
• Temperature Range: 0°C to +70°C
• 8-Pin DIP Package

Applications for the MAX802LCPA are diverse, ranging from computers and controllers to intelligent instruments and critical µP power monitoring. Its manual reset capability allows for a reset to be triggered with a simple push-button, providing an additional layer of control for system maintenance and troubleshooting.

Overall, Maxim Integrated's MAX802LCPA is an essential component for any system requiring reliable monitoring and control of the power supply to ensure smooth and error-free operation of microprocessor-based applications.