The MAX690TESA+ is a highly reliable 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.

This device is tasked with providing four essential functions to safeguard μP systems: a reset output during power-up, power-down, and brownout conditions; a 1.25V threshold detector for power-fail warning, low-battery detection, or for monitoring a power supply other than +5V; a 200ms reset pulse width to ensure proper system reset; and a watchdog timer to restart a stuck μP.

The MAX690TESA+ operates over a wide supply voltage range from 4.5V to 5.5V and consumes a low quiescent current of only 40μA, making it an energy-efficient choice for battery-powered applications. Its temperature specifications are guaranteed over the full automotive, commercial, and military temperature ranges.

Key features of the MAX690TESA+ include:

• Precision Voltage Monitor for +5V Power Supplies
• 200ms Reset Pulse Width
• Watchdog Timer to Restart Stuck μP
• Minimum Component Count
• Performance Guaranteed Over Temperature
• Low Cost
• Low Power Consumption
• Available in 8-Pin SO Package

Designed for use in computers, controllers, intelligent instruments, and critical μP power monitoring, the MAX690TESA+ is available in an 8-pin SO package. Its robust design ensures that the electronic systems it serves are protected from the dire consequences of power failures, thereby increasing the reliability and longevity of the application it is integrated into.

With its combination of features, the MAX690TESA+ is an essential component for any design requiring a dependable supervisory function, ensuring that systems remain operational and safe under a variety of power conditions.