The MAX690AMJA 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 battery-powered systems.

Key Features

• Voltage Monitoring: This device ensures that the system's voltage levels are under constant surveillance, providing a reset output during power-up, power-down, and brownout conditions. The reset threshold voltage is precisely preset by the manufacturer, ensuring dependable operation without the need for external adjustments.
• Power Supply Glitch Immunity: The MAX690AMJA contains circuitry that guards against false resets triggered by glitches on the power supply line, enhancing system stability and reliability.
• Low Power Consumption: Designed for energy-efficient operation, this supervisory circuit is suitable for battery-powered applications due to its low quiescent current draw.
• Backup Battery Switchover: In the event of a primary power failure, the MAX690AMJA automatically switches to a backup battery without any interruption, ensuring continuous operation of the system.
• Watchdog Timer: The built-in watchdog timer serves as an independent system monitor, which can reset the system in case of software failure, thus enhancing the overall system reliability.

Applications

The MAX690AMJA is versatile and can be used in a variety of applications. It is particularly well-suited for:

• Microprocessor systems
• Computers and controllers
• Battery-powered equipment
• Intelligent instruments
• Automotive systems

Package and Quality

Encased in a robust 8-pin CERDIP package, the MAX690AMJA is designed to withstand harsh environments and is reliable over a wide temperature range. Maxim Integrated ensures quality and performance, making this supervisory circuit a trusted choice for critical system monitoring tasks.