Maxim Integrated MAX6811LEUS Microprocessor Reset Circuit

The Maxim Integrated MAX6811LEUS is a single-supply, low-power 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.

The MAX6811LEUS comes in a compact SOT-143 package, making it ideal for space-constrained applications. Its primary function is to assert a reset signal whenever the VCC supply voltage declines below a preset threshold, ensuring that the µP resets cleanly during power-up, power-down, and brown-out conditions. The reset output remains asserted for a preset timeout period after VCC has risen above the reset threshold level, providing a guaranteed reset duration and allowing the power supply and µP to stabilize.

Features:

• Precision monitoring of +5V power-supply voltages
• Fully specified over temperature
• Available in four different output configurations: push-pull, push-pull with longer reset timeout, open-drain, and open-drain with longer reset timeout
• Low supply current of 6µA (typical)
• 140ms min power-on reset pulse width
• Immune to short VCC transients
• No external components needed
• Compact SOT-143 package

This device is specifically designed to ignore fast transients on VCC, and its low power consumption makes it suitable for battery-operated equipment. The MAX6811LEUS is a versatile component that can be used in a variety of applications, including computers, controllers, intelligent instruments, critical µP and µC power monitoring, and portable/battery-powered equipment.

Overall, the Maxim Integrated MAX6811LEUS offers a simple and efficient solution for system stability in the event of power supply inconsistencies, ensuring that your digital systems operate reliably and without interruption.