Maxim Integrated's MAX697CPE+ Microprocessor Supervisory Circuit

The MAX697CPE+ is a versatile microprocessor (µP) supervisory circuit designed by Maxim Integrated to monitor power supplies and microprocessor activity in digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in conjunction with +5V-powered circuits.

This supervisory circuit offers a variety of features to ensure that your system operates reliably under different conditions. One of the key features of the MAX697CPE+ is its ability to assert a reset signal to the µP during power-up, power-down, and brownout conditions. The reset signal remains asserted until the supply voltage reaches a stable condition, ensuring that the µP starts in a known state.

Additionally, the MAX697CPE+ includes a watchdog timer that monitors the µP or microcontroller, preventing it from running amok during a code execution error. The watchdog timer is fully adjustable, allowing for customization based on specific system requirements. If the µP does not provide a watchdog triggering pulse within a preset timeout period, the MAX697CPE+ will issue a system reset as a corrective action.

The MAX697CPE+ also features a battery backup switching circuit that automatically switches to a backup battery when the main power supply fails, ensuring continuous operation of volatile memory. This seamless transition is critical for applications that cannot afford to lose data or require an uninterrupted power supply for memory retention.

The device comes in a 16-pin DIP package, making it convenient for integration into a wide range of applications, including computers, controllers, and intelligent instruments. Its operating temperature range of 0°C to +70°C allows for deployment in environments with standard temperature requirements.

With its combination of reset output, watchdog timer, and battery backup switching, the MAX697CPE+ from Maxim Integrated is a reliable solution for enhancing system integrity in microprocessor-based applications. It helps prevent costly system failures, making it an essential component for designers looking to improve the dependability of their digital systems.