MAX6338AUB+T

Overview

The MAX6338AUB+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 threshold voltages for +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V inputs. 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 a reset timeout of less than 1ms minimum. Designed for surface-mount installation, it is housed in a compact 10-pin µMAX package and is guaranteed to operate across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Monitors four distinct voltage rails simultaneously using factory-programmed thresholds or user-adjustable comparator options
• Provides four independent open-drain active-low reset outputs for flexible system integration
• Operates with minimal power consumption at 25µA supply current
• Requires no external components for standard monitoring configurations

Applications

• Telecommunications equipment power supervision
• Desktop and notebook computer motherboard monitoring
• Data storage controller voltage tracking
• Industrial control system power integrity verification

Procurement Notes

Verify the specific suffix 'A' against the official Maxim Integrated datasheet to confirm the exact threshold voltage configuration, as this character denotes a specific factory-trimmed option within the MAX6338 family. Ensure the ordering part number matches the required monitored voltage levels (e.g., +5.0V, +3.3V) documented in the manufacturer's selection guide. Confirm the package type is 10-pin µMAX/uSOP and that the operating temperature range meets the -40°C to +85°C requirement for your specific application environment before finalizing procurement.

Selection Notes

Select the MAX6338AUB+T when a design requires simultaneous monitoring of multiple power rails within a limited board space. This component is suitable for applications needing a compact solution without external resistors or capacitors for threshold setting. Consider the open-drain output structure for compatibility with various logic families. Evaluate the 25µA quiescent current against battery life requirements if used in portable devices. Ensure the input voltage range aligns with the available factory-trimmed options or utilizes the adjustable comparator feature if non-standard voltages are present.

Part Context

The MAX6338 series belongs to Maxim Integrated's line of supervisory circuits designed for power management reliability. These devices are engineered to replace discrete comparator-based solutions, reducing component count and assembly complexity. The MAX6338AUB+T specifically represents a variant optimized for multi-supervision tasks in consumer and industrial electronics where space constraints and power efficiency are critical design parameters.

Replacement Considerations

Direct replacements include other MAX6338 variants with different suffixes (e.g., MAX6338OUB+, MAX6338MUB+) which share the same pinout and functionality but offer different factory-trimmed threshold voltages. Verify that the substitute part number corresponds to the exact voltage levels required by the target application circuit.