MAX6338OUB-T

Overview

The MAX6338OUB-T is a quad voltage monitor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors up to four power supplies without external components, featuring factory-trimmed thresholds for +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V inputs, plus an adjustable comparator option. The device operates within a supply voltage range of 2V to 5.5V and consumes 35µA of quiescent current. It provides active-low open-drain outputs with a minimum reset timeout of less than 1ms. The component is housed in a 10-uMAX package and supports surface-mount installation across a temperature range of -40°C to +85°C.

Feature Summary

• Monitors up to four independent power supply rails simultaneously without requiring external components
• Offers selectable factory-trimmed threshold voltages including negative rail support and high-impedance adjustable comparator functionality
• Generates active-low reset signals with guaranteed assertion delays upon undervoltage or overvoltage events

Applications

• Multi-rail embedded system power supervision
• Negative voltage rail monitoring in mixed-signal circuits
• Adjustable threshold detection for general-purpose voltage comparison

Procurement Notes

Verify the specific suffix designation against official datasheets to confirm exact threshold configurations, as variations exist within the MAX6338 family. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may be restricted. Ensure the ordering part number matches the required package type and electrical specifications for your design.

Selection Notes

Select this component when simultaneous monitoring of multiple rails, including negative voltages, is required. The adjustable input allows flexibility for non-standard voltage levels. Consider the 10-uMAX package constraints and the open-drain output requirement for pull-up resistor integration. Verify that the 35µA quiescent current meets system power budgets.

Part Context

This part belongs to the MAX6338 series of quad voltage monitors designed for microprocessor (µP) systems. It simplifies power management by integrating multiple supervisor functions into a single compact package. The series is widely used in industrial and consumer electronics where reliable power sequencing and fault detection are critical for system stability.

Replacement Considerations

Direct substitutes include other MAX6338 variants with different suffixes indicating specific threshold voltages or package types. Cross-referencing with the manufacturer's pin-compatible alternatives is recommended if specific threshold values differ from the OUB-T configuration.