Maxim Integrated Product: MAX811EUS+T Microprocessor (µP) Supervisory Circuit

The MAX811EUS+T from Maxim Integrated is a compact, highly-reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. It provides a precise, low-power voltage monitor with a built-in reset function, ensuring that the µP resets properly during power-up, power-down, and brown-out conditions.

This supervisory circuit is particularly suitable for battery-powered applications due to its low power consumption. The MAX811EUS+T variant is available in a small, 4-pin SOT-143 package, making it an ideal choice for space-constrained applications where board real estate is at a premium.

Key Features:

• Voltage Monitoring: The device has a preset reset threshold voltage, ensuring that the system has a stable power supply before allowing the µP to operate.
• Manual Reset Input: A manual reset input is provided, allowing for a reset to be triggered with an external pushbutton or logic signal.
• Low Power Consumption: The MAX811EUS+T is designed for low power consumption, drawing a quiescent current of only 2.5µA, which is ideal for portable battery-operated devices.
• Reset Timeout: It features an adjustable reset timeout period, providing flexibility to choose the reset assertion time suitable for the application.
• Temperature Range: The device operates over an extended temperature range of -40°C to +85°C, accommodating a wide range of environmental conditions.
• Immunity to Short Vcc Transients: The MAX811EUS+T is immune to short duration Vcc transients, preventing false resets and ensuring stable operation.

Applications:

The MAX811EUS+T is versatile and can be used in a variety of applications, including:

• Computers and Controllers
• Battery-Powered Equipment
• Intelligent Instruments
• Critical µP and µC Power Monitoring
• Portable and Wearable Devices

With its precision voltage monitoring and low power consumption, the MAX811EUS+T from Maxim Integrated is an essential component for any system requiring reliable µP supervision. Its small footprint and robust feature set make it a top choice for designers looking to enhance system stability and integrity.