Maxim Integrated MAX6806US26-T Microprocessor Reset Circuit

The MAX6806US26-T is a compact, highly reliable microprocessor (µP) supervisory circuit designed to monitor power supplies in µP and digital systems. Manufactured by Maxim Integrated, a renowned leader in analog and mixed-signal products, this component provides excellent circuit reliability and low cost by eliminating external components and adjustments when used in systems with a 2.63V threshold voltage.

This supervisory circuit is specifically engineered 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 minimum of 140ms after VCC has risen above the reset threshold level, providing sufficient time for the system to stabilize.

The MAX6806US26-T comes in a space-saving SOT-143 package, making it an ideal choice for portable and space-constrained applications. Its low supply current of 5µA (typical) is particularly beneficial for battery-operated equipment, allowing for extended battery life and reduced power consumption.

Key features of the MAX6806US26-T include:

• Preset VCC Reset Threshold at 2.63V
• Immune to Short VCC Transients
• 140ms (min) Reset Timeout Delay
• Low 5µA Supply Current
• Wide Operating Temperature Range: -40°C to +125°C
• Push-Pull RESET Output
• Available in a Small SOT-143 Package

Applications that benefit from the MAX6806US26-T include portable devices, computers, controllers, intelligent instruments, critical µP and µC power monitoring, and embedded systems that require reliable initialization during power-up or recovery from power failures.

With its combination of features, the MAX6806US26-T from Maxim Integrated offers designers a straightforward and effective solution for enhancing system reliability through proactive power supply monitoring. Its ease of integration and robust performance characteristics make it a valuable component for maintaining the integrity of digital systems.