Maxim Integrated MAX699CWE+ Overview

The MAX699CWE+ is a state-of-the-art microprocessor (µP) supervisory circuit designed by Maxim Integrated 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.

Key Features

• Power Supply Monitoring: The MAX699CWE+ ensures that the µP is only operational when the power supply is within acceptable limits. It monitors the power supply voltage and keeps the µP in reset mode during power-up, power-down, and brownout conditions.
• Manual Reset Input: A dedicated manual reset input allows for a system reset to be triggered with an external switch or logic signal, providing additional control and safety.
• Battery Backup Switching: The device includes a battery backup switching option that automatically switches to the backup battery when the main power supply fails, ensuring continuous operation of critical system components.
• Watchdog Timer: An onboard watchdog timer can be used to monitor software execution integrity. If the µP fails to provide a periodic signal, the device will trigger a system reset, helping to recover from software lock-up conditions.
• Low Power Consumption: Designed to be power-efficient, the MAX699CWE+ consumes minimal power, making it suitable for portable and power-sensitive applications.

Applications

With its robust feature set, the MAX699CWE+ is ideal for use in a wide range of applications, including:

• Computers and Controllers
• Intelligent Instruments
• Portable/Battery-Powered Equipment
• Embedded Systems

Technical Specifications

The device comes in a 16-pin Wide SO package and operates over the extended temperature range of -40°C to +85°C. It requires a supply voltage of +4.75V to +5.5V, making it compatible with most +5V systems. The MAX699CWE+ features an active-low reset output, which simplifies interfacing with other logic components.

Conclusion

The Maxim Integrated MAX699CWE+ offers a compact, reliable solution for power monitoring and µP system control. Its integration of key supervisory functions into a single chip helps to enhance system stability while reducing component count and overall design complexity.