The MAX809EUR+T from Maxim Integrated is a compact, three-pin microprocessor (μP) supervisory circuit that provides a highly accurate and reliable system reset. This component is specifically designed to monitor power supplies in digital systems; it ensures that the microprocessor is reset to a known state during power-up, power-down, or brown-out conditions. The MAX809EUR+T is an essential component for systems that require a high degree of operational reliability and precision.

Key Features

• Precision Monitoring: It features a precision voltage sensor capable of monitoring V<sub>CC for under-voltage conditions. Once an out-of-tolerance condition is detected, the reset output is asserted, which remains active until V<sub>CC returns to an acceptable level.
• Low Power Consumption: This device is optimized for low power consumption, making it suitable for power-sensitive applications, including portable and battery-operated equipment.
• Manual Reset Input: The inclusion of a manual reset input allows for a reset to be triggered with an external switch or logic signal, providing additional system control.
• High Accuracy: The reset threshold voltage is factory-trimmed to high accuracy, which ensures reliable reset activation at the appropriate voltage level.
• Immunity to Short V<sub>CC Transients: The MAX809EUR+T is designed to ignore short-duration transients on the V<sub>CC line, which helps prevent false triggering of the reset signal.

Applications

The MAX809EUR+T is versatile and can be used across a wide range of applications, including:

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

Technical Specifications

With an operating temperature range of -40°C to +85°C and available in a SOT-23 package, the MAX809EUR+T is designed for integration into various environments and platforms. It supports a supply voltage range typically from 1.2V to 5.5V, ensuring compatibility with a broad spectrum of microprocessors and digital systems.

Integrating the MAX809EUR+T into your system design will enhance the reliability and performance of your applications by providing a stable and secure reset function, which is a critical component for maintaining the integrity of any microprocessor-based system.