Maxim Integrated's MAX691EPE+ Microprocessor Supervisory Circuit

The MAX691EPE+ is a highly integrated microprocessor (µP) supervisory circuit designed by Maxim Integrated to provide a range of monitoring and control functions essential for the reliable operation of microprocessor-based systems. With its precision voltage monitoring and power-on reset capabilities, the MAX691EPE+ ensures that µPs and their peripherals are initialized in the correct state upon power-up and remain operational under various system conditions.

Key Features

• Power Supply Monitoring: The device keeps a watchful eye on the power supply voltage levels, ensuring that the µP is reset to its start-up state whenever a power failure is detected. This feature helps prevent system errors and data corruption.
• Battery Backup Switching: In the event of a power failure, the MAX691EPE+ automatically switches to a backup battery, maintaining the volatile memory and real-time clock operations.
• Programmable Watchdog Timer: To ensure that the µP is operating correctly, the device incorporates a watchdog timer that must be periodically reset by the µP. If the µP fails to reset the timer, the MAX691EPE+ will issue a system reset, indicating that the µP may have malfunctioned or locked up.
• Manual Reset Input: This input allows for an external signal to initiate a system reset, providing additional flexibility and control for system maintenance or emergency situations.

Applications

The MAX691EPE+ is ideal for use in a variety of applications where reliable system operation is critical. These include:

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

With its robust feature set and Maxim Integrated's reputation for quality, the MAX691EPE+ is a trusted solution for designers looking to enhance the safety and reliability of their microprocessor systems. Its versatility and ease of integration make it a go-to choice for a wide range of electronic applications.

The MAX691EPE+ comes in a 16-pin DIP (Dual In-line Package) and is specified for the extended industrial temperature range of -40°C to +85°C, providing reliable performance across diverse environments.