Maxim Integrated MAX699CWE Microprocessor Supervisory Circuit

The Maxim Integrated MAX699CWE is a highly reliable microprocessor (µP) supervisory circuit designed 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 device significantly improves system reliability and accuracy compared to separate ICs or discrete components. The MAX699CWE offers a variety of features that make it a versatile choice for managing microprocessor systems. It includes functions such as power-on reset control, watchdog timer, battery backup switching, and write protection for memory.

Key Features:

• Power-On Reset: The MAX699CWE generates a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring the µP starts in a known state.
• Watchdog Timer: A watchdog timer is built-in to ensure the µP does not hang in an erroneous state. If the µP does not toggle the watchdog input within a preset time frame, the MAX699CWE will issue a system reset.
• Manual Reset: An external input is provided to manually initiate a system reset, allowing for flexibility in system design and troubleshooting.
• Battery Backup Switching: The device automatically switches to backup battery power when the VCC supply fails, ensuring data integrity in volatile memory.
• Write Protection: The MAX699CWE provides write protection for memory, preventing accidental corruption during low voltage or power failure conditions.

Applications:

The MAX699CWE is suitable for a wide range of applications, including:

• Computers and Controllers
• Intelligent Instruments
• Critical µP and µC Power Monitoring
• Portable/Battery-Powered Equipment

With its industry-standard 16-pin SOIC package, the MAX699CWE is easy to integrate into existing designs. Its robust feature set ensures that digital systems function reliably, especially during power-up, power-down, and brown-out conditions. Whether in industrial, commercial, or consumer applications, the MAX699CWE from Maxim Integrated is an excellent choice for ensuring the integrity of your microprocessor-based systems.