MAX6338KUB+T

Overview

The MAX6338KUB+T is a quad voltage monitor from Analog Devices Inc./Maxim Integrated, designed to supervise up to four power supplies without external components. It features factory-trimmed threshold voltages for +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V inputs, alongside an adjustable comparator option. The device operates within a supply voltage range of +2.5V to +5.5V and draws a low supply current of 25µA. It provides four independent open-drain active-low outputs with reset timeouts under 1ms. The component is rated for operation from -40°C to +85°C and is housed in a compact 10-pin µMAX package.

Feature Summary

• Monitors four distinct voltage rails simultaneously using internal comparators
• Offers flexible input options including fixed nominal voltages and user-adjustable thresholds
• Provides four independent open-drain active-low reset outputs
• Eliminates the need for external resistors or capacitors for basic operation

Applications

• Telecommunications equipment power supervision
• Desktop and notebook computer system monitoring
• Data storage equipment voltage tracking
• Industrial control systems requiring multi-rail oversight

Procurement Notes

Verify the specific suffix 'K' against official Analog Devices documentation 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 limited. Ensure the tape-and-reel packaging format matches your automated assembly requirements.

Selection Notes

Select this component when simultaneous monitoring of multiple voltage rails is required in space-constrained designs. The integrated nature reduces bill-of-materials count compared to discrete solutions. Consider the adjustable comparator feature if custom threshold levels are needed beyond standard logic supply voltages. Verify that the open-drain output configuration aligns with the downstream logic interface requirements.

Part Context

The MAX6338 series belongs to Maxim Integrated's line of supervisory circuits, now part of Analog Devices. These devices are engineered for reliable power management in portable and industrial applications. The µMAX package offers a small footprint suitable for dense PCB layouts. This specific variant continues the tradition of providing robust voltage monitoring with minimal external component dependency.

Replacement Considerations

Direct substitutes include other MAX6338 variants with different suffixes (e.g., MAX6338CUB+, MAX6338OUB+) which share the same pinout and core functionality but differ in factory-programmed threshold voltages. Ensure the replacement part's threshold settings match the monitored supply rails before substitution.