Maxim Integrated's MAX693CPE+ Microprocessor Supervisory Circuit

The MAX693CPE+ from Maxim Integrated 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 system housekeeping for microprocessors and digital systems. This device is particularly suitable for use in computers, controllers, intelligent instruments, and critical µP power monitoring applications.

Key Features

• Power Supply Monitoring: The MAX693CPE+ ensures that the µP is only operating with a stable and valid power supply. It features a precision voltage monitor that tracks the VCC supply voltage and initiates a reset if the voltage drops below a preset threshold, ensuring safe operation and boot-up.
• Manual Reset Capability: A manual reset input allows for a reset to be triggered with an external push-button or logic signal, providing an additional layer of system control.
• Backup Battery Switchover: In the event of a primary power failure, the device automatically switches to a backup battery, maintaining power to the memory and real-time clock functions without interruption.
• Watchdog Timer: An onboard watchdog timer ensures that the µP is operating correctly by requiring periodic check-ins from the µP. If the µP fails to reset the watchdog timer within a preset interval, the MAX693CPE+ will issue a system reset.
• Low Power Consumption: With its low power requirements, the MAX693CPE+ contributes to the overall energy efficiency of the system it is protecting.

Package and Temperature Range

The MAX693CPE+ is offered in a 16-pin DIP (Dual In-line Package) and operates over the extended temperature range of -40°C to +85°C, making it versatile for various industrial environments.

Applications

Its robust feature set makes the MAX693CPE+ ideal for critical applications where data integrity and system reliability are paramount. These include:

• Microprocessor systems
• Computers and servers
• Embedded systems
• Industrial controls
• Portable/battery-powered equipment

With the MAX693CPE+, system designers can ensure enhanced protection against power supply inconsistencies, uncontrolled system resets, and data loss, maintaining the integrity and reliability of their digital systems.