MAX6328UR30

Overview

The MAX6328UR30+T is a single-channel voltage supervisory circuit manufactured by Analog Devices Inc. (Maxim Integrated). It operates within a supply voltage range up to 5.5 V and features a fixed threshold of 3 V with an accuracy of 1.5%. The device provides an active-low, open-drain reset output with a typical reset delay time of 185 ms. It consumes a maximum quiescent current of 500 nA and functions reliably across an industrial temperature range of -40°C to +85°C. Packaged in a compact SOT-23-3 surface-mount case, it supports manual reset-free operation without watchdog or backup switching capabilities.

Feature Summary

• Ultra-low power consumption with 500 nA operating current for battery efficiency
• Fixed 3 V threshold monitoring with 1.5% accuracy for precise supervision
• Active-low open-drain reset output compatible with various logic families
• Compact SOT-23-3 package suitable for space-constrained designs

Applications

• Portable electronic devices requiring low-power voltage monitoring
• Battery-operated systems needing reliable power-fail detection
• Microcontroller reset circuits in embedded applications
• Industrial control systems operating in extended temperature ranges

Procurement Notes

Verify the complete part number including suffixes such as +T for reel packaging when ordering. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure compatibility with existing PCB footprints for SOT-23-3 packages. Check for any specific handling requirements regarding moisture sensitivity level 1 classification during storage and assembly processes.

Selection Notes

Select this component when a fixed 3 V threshold is required for single-supply monitoring. Consider the 185 ms reset delay for timing-sensitive applications. Evaluate the 500 nA quiescent current against system power budgets. Verify that the open-drain output configuration meets interface requirements with downstream logic components without additional pull-up resistors if already present.

Part Context

This device belongs to the MAX6328U series of ultra-low-power reset circuits. It shares functional similarities with other members like MAX6328UR28+ but differs in threshold voltage specifications. The series is designed for general-purpose voltage supervision in portable and industrial electronics where power efficiency and small form factors are critical design constraints.

Replacement Considerations

Direct substitutes include MAX6328UR28+T for different threshold requirements. Cross-reference pinouts and electrical characteristics carefully before substitution. Verify thermal performance and package dimensions match existing board layouts. Consult official datasheets for parameter variations between series members.