The MAX817MCSA+ is a high-performance 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 with 5V-powered circuits.

Key Features

• Precision Monitoring: This component ensures precise monitoring of 5V power supplies and other voltages, safeguarding your system against power supply faults.
• Reset Output: The MAX817MCSA+ features an active-low reset output, which provides a guaranteed valid reset for a minimum of 140ms after VCC has returned to an in-tolerance condition. This ensures reliable system reset operation without manual intervention.
• Manual Reset Input: A manual reset input is also available, allowing for a triggered system reset by an external signal, providing an additional layer of system control.
• Power-Fail Comparator: An integrated power-fail comparator gives early warning of impending power failure, allowing the system to take preemptive action to preserve data integrity.
• Backup Battery Switchover: In the event of a primary power failure, the MAX817MCSA+ automatically switches to a backup battery, ensuring uninterrupted operation.
• Low Power Consumption: The device is designed for low power consumption, which is critical for battery-powered applications.
• Compact Package: Available in an 8-pin SO package, the MAX817MCSA+ is designed for space-constrained applications.

Applications

The MAX817MCSA+ is ideal for use in a variety of applications where power supply monitoring is critical. This includes:

• Computers and Controllers
• Intelligent Instruments
• Portable/Battery-Powered Equipment
• Critical µP Power Monitoring

Technical Specifications

With its wide operating temperature range from -40°C to +85°C and 5.5V maximum supply voltage, the MAX817MCSA+ is designed for robust performance in challenging environments. Its low supply current of 40µA (typical) makes it an efficient choice for power-sensitive designs.