MAX6338DUB+

Overview

The MAX6338DUB+ is a quad voltage monitor supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It monitors four power supply inputs without requiring external components, utilizing factory-trimmed threshold voltages of 1.8 V, 3.3 V, and 5 V, alongside an adjustable input option. The device features active-low, open-drain outputs and operates within a supply voltage range up to 5.5 V. It maintains a typical operating supply current of 35 uA and ensures accuracy of 2.5%. The component is housed in a 10-pin UMAX package and supports operation across a temperature range from -40°C to +85°C.

Feature Summary

• Monitors up to four independent voltage supplies simultaneously without external components
• Provides four open-drain, active-low reset outputs for system supervision
• Offers factory-trimmed thresholds for standard rails plus an adjustable comparator option

Applications

• Telecommunications equipment
• Desktop and notebook computers
• Data storage systems
• Industrial control equipment

Procurement Notes

Verify the specific suffix DUB against the official datasheet to confirm the exact threshold configuration, as the MAX6338 series utilizes alphanumeric codes to denote distinct factory-set voltage levels. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary due to limited stock or obsolescence notices associated with legacy Maxim products.

Selection Notes

Select this component when simultaneous monitoring of multiple fixed-voltage rails is required in space-constrained designs. The integrated adjustable channel allows flexibility for non-standard voltages. Ensure the open-drain output architecture aligns with the downstream logic requirements, as pull-up resistors are necessary for proper signal transmission.

Part Context

This part belongs to the MAX6338 family of quad voltage monitors designed for low-power applications. It replaces older discrete supervisor solutions by integrating four comparators into a single 10-pin µMAX package. The series is optimized for portable and industrial electronics where board space and quiescent current consumption are critical design constraints.

Replacement Considerations

Direct substitutes include other MAX6338 variants with different suffixes (e.g., MAX6338OUB+) that offer alternative threshold combinations. Verify pin compatibility and electrical specifications before substitution.