The MAX807NCUE from Maxim Integrated is a highly efficient microprocessor (µP) supervisory circuit designed 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 battery-powered applications. The MAX807NCUE is well-suited for systems that require a watchdog timer, manual reset capability, and a reset signal delay.

Key Features

• Precision Monitoring: This device offers precision monitoring of +3V, +3.3V, and +5V power-supply voltages, ensuring that the system's microprocessor is always operating under optimal power conditions.
• Integrated Watchdog Timer: The built-in watchdog timer helps to ensure that the system remains operational by monitoring the software execution and system activity. If the system becomes unresponsive, the watchdog timer can reset the system to a known state.
• Manual Reset Input: The manual reset input allows for an external signal to trigger a system reset, providing an additional layer of control for system maintenance or emergency interventions.
• Power-Fail Comparator: The MAX807NCUE includes a power-fail comparator that triggers a reset if the power supply falls below a specific threshold, which is critical for preventing system malfunctions due to power instability.
• Active-Low Reset: An active-low reset signal is asserted during power-up, power-down, and brownout conditions, ensuring that the µP starts in a known state.
• Reset Time Delay: The device features a reset time delay, which provides a predictable time interval for the system to stabilize before it becomes operational after a reset event.

Applications

The MAX807NCUE is ideal for a variety of applications, including:

• Computers and Controllers
• Embedded Systems
• Portable/Battery-Powered Equipment
• Intelligent Instruments
• Automotive Systems

With its compact 16-pin QSOP package, the MAX807NCUE offers a space-saving design that is perfect for modern electronic systems where space is at a premium. It operates over a wide temperature range, making it suitable for industrial applications as well.

For designers and engineers looking to enhance system reliability and performance, the MAX807NCUE from Maxim Integrated is a robust choice that combines monitoring precision with functional integration.