The MAX816CPA is a highly reliable microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems that require voltage monitoring and battery control functions.

Key Features

• Precision Monitoring: The MAX816CPA offers precision monitoring of 5V, 3.3V, and other voltage levels to ensure that the microprocessor is operating under optimal power conditions.
• Power-On Reset Control: Upon power-up, the device ensures that the µP's reset input starts in the active state. It keeps the µP in reset for a minimum of 140ms after the supply has reached the valid threshold to allow the power supply and processor to stabilize before operation begins.
• Manual Reset Feature: This feature allows for a manual reset, providing an easy way to initiate a system reset from an external push-button or logic signal.
• Watchdog Timer: An onboard watchdog timer ensures that the µP does not lock up in a runaway state by forcing a system reset if the µP does not provide a periodic signal within a preset timeout period.
• Battery Backup Switching: The MAX816CPA includes automatic backup battery switching, which maintains memory and real-time clock operation during power failures.
• Low Power Consumption: Designed for low power consumption, this supervisory circuit is ideal for power-sensitive applications.

Applications

The MAX816CPA is versatile and can be used in a wide array of applications. It is particularly suited for portable devices, computers, controllers, and intelligent instruments where power monitoring is critical for data integrity and system stability.

Package and Availability

Encased in an 8-pin DIP package, the MAX816CPA is readily available for integration into your system. Its industry-standard footprint ensures compatibility with a wide range of PCB layouts.

Conclusion

With its robust feature set and Maxim Integrated's reputation for quality, the MAX816CPA supervisory circuit is an essential component for any system requiring reliable power monitoring and management. Its ability to enhance system reliability while reducing component count makes it a valuable addition to any power-critical application.