MAX6338BUB

Overview

The MAX6338BUB is a quad voltage monitor from Analog Devices/Maxim Integrated, designed to supervise up to four power supplies without external components. It features four independent open-drain active-low outputs and operates within a +2.5V to +5.5V supply range. The device offers low 25µA supply current and guaranteed operation from -40°C to +85°C. Factory-trimmed thresholds include options for +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V nominal voltages, alongside adjustable comparator inputs.

Feature Summary

• Monitors four distinct voltage rails simultaneously using factory-programmed or user-adjustable threshold settings
• Provides four independent open-drain active-low reset outputs for direct logic interfacing
• Operates with ultra-low 25µA supply current to minimize power consumption in battery-backed systems
• Requires no external components for basic supervision, simplifying circuit design and reducing board space

Applications

• Telecommunications equipment requiring multi-rail power supervision
• Desktop and notebook computers monitoring system bus voltages
• Data storage equipment supervising drive interface power lines
• Networking hardware ensuring stable voltage levels for signal integrity

Procurement Notes

Verify the specific suffix (e.g., BUB vs DUB) against the datasheet to confirm exact threshold configurations, as variations exist within the MAX6338 family. Confirm RoHS compliance status and lead times through authorized distributors, as availability may vary by region. Ensure the ordering part number matches the required package type and temperature grade for your specific application environment.

Selection Notes

Select the MAX6338BUB when simultaneous monitoring of four distinct voltage domains is required without external passive components. Choose this part if low quiescent current is critical for battery-operated or energy-efficient designs. Verify that the fixed threshold voltages align with your system's nominal rail levels, or consider adjustable variants if custom trip points are necessary. Ensure the open-drain output configuration matches your downstream logic requirements.

Part Context

The MAX6338 series belongs to Maxim Integrated’s line of compact supervisory circuits, now under Analog Devices. These devices are engineered for applications demanding reliable power management in minimal footprints. The MAX6338 specifically targets multi-voltage systems common in computing and industrial sectors, offering a robust solution for detecting under-voltage and over-voltage conditions across multiple rails simultaneously.

Replacement Considerations

Check for MAX6338 variants with different suffixes (e.g., CUB, DUB, MUB) which offer different factory-trimmed threshold combinations. Ensure any substitute maintains the same 10-pin uMAX package and electrical characteristics. Verify compatibility with existing PCB layout and logic levels before replacement.