Maxim Integrated's MAX706EUA Microprocessor Supervisory Circuit

The MAX706EUA from Maxim Integrated is a compact, highly reliable 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 with 5V-powered circuits.

This device significantly improves system robustness by providing several essential functions: a reset output during power-up, power-down, and brownout conditions; and a 1.25V threshold detector for power-fail warning, low-battery detection, or to monitor a power supply other than +5V. The reset output is guaranteed to remain in the logic low state for a minimum of 140ms after V_CC has risen above the reset threshold level.

The MAX706EUA comes in a compact 8-pin μMAX package, making it ideal for space-constrained applications. It includes a debounced manual reset input feature, allowing for a simple external push-button to manually reset the system. The device operates over a wide voltage range, making it suitable for use in systems with 5V power supplies.

Key features of the MAX706EUA include:

• Precision Monitoring of +5V Power-Supply Voltages
• Fully Specified Over Temperature
• Available in 8-Pin μMAX Package
• 140ms min Power-On Reset Pulse Width
• 1.25V Threshold Detector for Power-Fail Warning, Low-Battery Detection, or Monitoring a Power Supply Other Than +5V
• Debounced Manual Reset Input

Designed for demanding applications, the MAX706EUA is ideal for portable devices, computers, controllers, and intelligent instruments where reliable monitoring of system power is critical. Its low supply current of 17μA (typical) makes it suitable for battery-operated applications.

With its combination of features, the MAX706EUA provides a simple and efficient solution for system reset and power failure detection, ensuring that digital systems maintain integrity and reliability under varying conditions of operation.