MAX6326UR31-

Supervisors Overview

The MAX6326UR31+T is a microprocessor supervisory circuit from Analog Devices/Maxim Integrated, designed for ultra-low-power applications. It monitors a single voltage input and provides an active-low push-pull reset output when the supply voltage drops below a factory-trimmed threshold of 3.1V. The device features a minimum reset timeout of 100ms and operates within a supply range up to 5.5V. It consumes a maximum supply current of 1µA and functions reliably across a temperature range of -40°C to +85°C in SOT-23-3 or SC-70-3 packages.

Supervisors Feature Summary

• Ultra-low power consumption with maximum supply current of 1µA
• Active-low push-pull reset output for direct logic interfacing
• Factory-trimmed reset threshold ensuring precise voltage monitoring
• Guaranteed valid reset state down to 1V supply voltage

Supervisors Applications

• Portable and battery-powered equipment
• Microprocessor and digital system power monitoring
• Intelligent instruments requiring reliable supervision
• Controllers needing compact footprint solutions

Supervisors Procurement Notes

Verify the complete part number including suffixes such as +T for tape and reel packaging. Confirm that the specific threshold voltage corresponds to the UR31 designation (3.1V). Check manufacturer documentation for current availability status, as some variants may have limited stock or be subject to allocation. Ensure compatibility with existing PCB footprints for SOT-23-3 or SC-70-3 packages during integration.

Supervisors Selection Notes

Select this component when a fixed 3.1V threshold is required for systems powered by 3.3V rails. Choose the push-pull output variant over open-drain if driving standard logic inputs without external pull-ups. Consider the 100ms timeout period against system startup requirements. Evaluate the 1µA quiescent current benefit for battery life extension compared to higher-current supervisors.

Supervisors Part Context

This part belongs to the MAX6326/MAX6327/MAX6328 family of 3-pin, ultra-low-power µP reset circuits. These devices eliminate external components and adjustments for common voltage levels. The MAX6326 specifically offers a push-pull output, distinguishing it from the open-drain MAX6328 and active-high MAX6327 variants within the same low-power series.

Supervisors Replacement Considerations

Direct substitutes include other MAX6326 variants with different thresholds (e.g., MAX6326UR23, MAX6326XR24) if the voltage level differs. Cross-family replacements like MAX6384 require checking package and output type compatibility. Verify that any substitute maintains the 1µA max current specification and adequate operating temperature range.