Introducing the MAX691AEJE Microprocessor Supervisory Circuit

The MAX691AEJE from Maxim Integrated is a comprehensive solution designed to monitor power supplies in microprocessor and digital systems. It provides a significant line of defense against system failures caused by erratic power supply voltages and brown-out conditions. This advanced supervisory circuit ensures that the microprocessor is reset to a known state during power-up, power-down, and brown-out conditions.

Key Features of MAX691AEJE

• Power-Supply Monitoring: The MAX691AEJE keeps a watchful eye on the power supply, ensuring that the microprocessor has a stable voltage to operate correctly. It prevents any erratic behavior due to voltage fluctuations.
• Automatic Reset: Upon detecting an out-of-tolerance power supply condition, the device generates a reset signal to the microprocessor. This signal is maintained for at least 200ms after the supply voltage returns to a stable operating level, ensuring a proper system restart.
• Battery Backup Switching: In the event of a power failure, the MAX691AEJE automatically switches to a backup battery, allowing critical data to be saved and preventing loss of information.
• Watchdog Timer: The integrated watchdog timer ensures that the microprocessor does not hang in an unresponsive state. If the microprocessor fails to provide a periodic signal to the MAX691AEJE, a reset signal is issued.
• Programmable Reset Pulse Width: The duration of the reset pulse can be set by the user to ensure compatibility with a wide range of microprocessors and systems.

Applications

The MAX691AEJE is versatile and can be used in various applications, including:

• Computers and Servers
• Embedded Systems
• Communication Equipment
• Industrial Controllers
• Portable/Battery-Powered Equipment

Package and Quality

The MAX691AEJE is offered in a 16-pin JEDEC PDIP package, ensuring easy integration into a wide variety of system designs. Maxim Integrated is known for its commitment to quality, and this supervisory circuit is no exception, providing reliable and consistent performance.

With its robust feature set, the MAX691AEJE is an essential component for system designers looking to enhance the reliability and stability of their microprocessor-based systems.