Maxim Integrated's MAX699EWE Microprocessor Supervisory Circuit

The MAX699EWE from Maxim Integrated is a sophisticated microprocessor (μP) supervisory circuit designed 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 conjunction with +5V-powered circuits.

This compact device comes in a 16-pin SO (small outline) package, making it suitable for space-constrained applications. The MAX699EWE offers a variety of features to ensure that your microprocessor system operates reliably under various conditions.

Key Features:

• Power Supply Monitoring: The MAX699EWE continuously monitors the +5V power supply and keeps the microprocessor in reset until that supply is stable and within acceptable limits. This feature helps to prevent system errors and malfunctions that can occur due to power supply variations or spikes.
• Manual Reset Capability: A manual reset input allows for a reset to be triggered with an external switch or logic signal, providing additional control and safety measures for system operators.
• Backup Battery Switchover: In the event of a primary power failure, the device automatically switches to a backup battery, ensuring uninterrupted operation and data retention.
• Watchdog Timer: The integrated watchdog timer keeps the system in check by monitoring software execution intervals. If the software fails to provide a periodic reset signal to the watchdog, the MAX699EWE will issue a system reset, helping to recover from software lock-up conditions.
• Power-OK/Reset Time Delay: The device features a programmable time delay for power-OK and reset signals, providing flexibility to accommodate various system startup requirements.

Applications:

The MAX699EWE is ideal for use in a broad range of applications that require reliable monitoring and control of the power supply to microprocessors. These include:

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

With its robust feature set and Maxim Integrated's reputation for quality, the MAX699EWE is an excellent choice for designers looking to enhance system reliability and performance without incurring significant development costs.