Product Overview: MAX691AEPE+ from Maxim Integrated

The MAX691AEPE+ is a highly integrated 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 battery-powered systems. This supervisory circuit significantly improves system consistency and accuracy over temperature, voltage, and time.

Featuring a combination of functions such as power-on reset control, watchdog timer, battery backup switching, and power-fail warning, the MAX691AEPE+ ensures that the µP system powers up and operates correctly. These features make it an ideal choice for use in microprocessor systems, computers, controllers, and intelligent instruments.

Key Features

• Power Supply Monitoring: The device ensures that the system's power supply remains within acceptable limits, providing a reset output during power-up, power-down, and brownout conditions.
• Watchdog Timer: A built-in watchdog timer helps to reset the microprocessor within a set time frame if a malfunction occurs, ensuring system reliability and safety.
• Battery Backup: It includes a battery backup capability that automatically switches to the backup battery when the main power supply fails, preserving critical data and system functionality.
• Power-Fail Warning: The MAX691AEPE+ generates an early warning signal when the power supply falls below a preset threshold, allowing the system to take appropriate action before a power failure occurs.

Applications

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

The MAX691AEPE+ is packaged in a 16-pin plastic DIP (PDIP) and operates over the extended industrial temperature range of -40°C to +85°C. Its robust feature set and packaging make it a versatile choice for various applications that require reliable voltage monitoring and system integrity checks.

With the MAX691AEPE+, Maxim Integrated continues to deliver innovative, high-quality integrated circuits that solve design challenges in the rapidly evolving electronics industry.