MAX6332UR18D3+T

Overview

The MAX6332UR18D3+T is a 3-pin, ultra-low-voltage, low-power microprocessor supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It monitors a single voltage input with a fixed threshold of 1.8V and features an active-high push-pull RESET output. The device operates within a supply voltage range up to 5.5V and maintains a typical quiescent current of 3.3µA. It provides a reset timeout period of 40ms and functions reliably across an extended temperature range from -40°C to +125°C. Packaged in SOT-23-3, it eliminates external components for power supply monitoring.

Feature Summary

• Provides active-high push-pull reset signal assertion when supply voltage drops below the preset threshold
• Operates with ultra-low quiescent current consumption suitable for battery-powered applications
• Includes internal reset timeout circuitry to ensure stable power-up sequencing

Applications

• Monitoring power supplies in 1.8V microprocessor systems
• Digital system power supervision requiring high reliability
• Battery-operated devices needing low standby current

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific lot traceability requirements before integration. Check for obsolescence notices as this series may have limited availability. Ensure packaging specifications match assembly line requirements. Validate datasheet revisions against current design specifications.

Selection Notes

Select this component when an active-high reset output is required, distinguishing it from the active-low variants in the same family. Verify that the 1.8V threshold aligns with the monitored rail. Consider the SOT-23-3 package constraints for PCB layout. Compare quiescent current specifications against other uPower series options if lower power is critical.

Part Context

This part belongs to the MAX6332/MAX6333/MAX6334 family of 3-pin uP reset circuits. While sharing identical electrical characteristics and thresholds, the MAX6332 is uniquely defined by its active-high output, whereas the MAX6333 offers active-low push-pull and the MAX6334 provides active-low open-drain outputs. All three share the same low-power architecture and thermal ratings.

Replacement Considerations

Direct functional substitutes include MAX6333UR18D3+T and MAX6334UR18D3+T, provided the active-high requirement is relaxed. Verify pinout compatibility and output stage differences before substitution.