MAX6328UR31

Overview

The MAX6328UR31+T is a supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated, designed for monitoring single voltage rails. It operates within a supply voltage range of up to 5.5V and features a fixed threshold voltage of 3.1V. The device provides an active-low open-drain reset output with a typical reset delay time of 185ms. It consumes a maximum quiescent current of 500nA, ensuring ultra-low power consumption. The component is housed in a compact SOT-23-3 surface-mount package and supports operation across an extended temperature range from -40°C to +85°C.

Feature Summary

• Ultra-low power consumption with a maximum quiescent current of 500nA
• Fixed voltage threshold detection at 3.1V for precise monitoring
• Active-low open-drain reset output compatible with various logic families
• Compact three-pin SOT-23 surface-mount packaging

Applications

• Portable battery-powered equipment requiring low standby current
• Microprocessor system power supply supervision
• Handheld instruments and consumer electronics
• Industrial control systems operating in harsh environments

Procurement Notes

Verify the specific suffix designation (+ or +T) to confirm lead-free status and tape-and-reel packaging configuration. Ensure compatibility with the target PCB footprint for the SOT-23-3 package. Confirm that the fixed 3.1V threshold aligns with the monitored rail requirements. Check for RoHS compliance documentation if required by regulatory standards.

Selection Notes

Select this component when a fixed 3.1V threshold is appropriate for the application. Consider the 185ms reset delay for timing-sensitive circuits. Evaluate the 500nA quiescent current against total system power budgets. Compare with other MAX6328 variants if different thresholds or manual reset capabilities are needed.

Part Context

This part belongs to the MAX6328 family of ultra-low-power voltage supervisors. The series offers various fixed threshold options to monitor different voltage rails. These devices are designed for applications where power conservation is critical. The family shares common pinouts and functional characteristics, differing primarily in threshold voltages and packaging options.

Replacement Considerations

Direct substitutes include other MAX6328 variants with identical SOT-23-3 packaging but different threshold voltages, such as MAX6328UR30 or MAX6328UR33. Verify that the alternative threshold voltage matches the system design requirements before substitution.