MAX6338OUB+

Overview

The MAX6338OUB+ is a quad voltage monitor manufactured by Analog Devices Inc./Maxim Integrated, designed to supervise up to four power supply rails without external components. It operates within a supply voltage range of 2.5 V to 5.5 V and features active low, open-drain outputs with a reset timeout of less than 1 ms minimum. The device monitors specific thresholds including -5 V, 3.3 V, 5 V, and an adjustable input. It maintains a quiescent current of 35 uA and offers 2.5% accuracy. The component is housed in a 10-UMAX package and supports operation from -40°C to +85°C.

Feature Summary

• Monitors up to four independent power supply rails simultaneously
• Provides active low open-drain reset outputs for system supervision
• Includes factory-trimmed thresholds for standard voltages and an adjustable comparator option
• Operates with low quiescent current suitable for battery-powered applications

Applications

• Supervising multiple voltage rails in embedded systems
• Monitoring power supplies in portable electronic devices
• System reset generation in industrial control equipment

Procurement Notes

Verify the exact threshold configuration matches the design requirements, as the O suffix indicates specific factory-set values including negative voltage monitoring. Confirm the 10-UMAX package dimensions fit the PCB layout constraints. Ensure the operating temperature range meets the environmental specifications of the target application. Cross-reference the datasheet revision to confirm pinout and electrical characteristics remain consistent with previous versions.

Selection Notes

Select this component when simultaneous monitoring of four distinct voltage levels is required, particularly if one rail involves a negative voltage such as -5 V. The adjustable input allows flexibility for non-standard thresholds. Consider the 35 uA quiescent current for power efficiency. Verify that the open-drain output type aligns with the pull-up resistor strategy of the receiving logic circuitry.

Part Context

The MAX6338 series belongs to Maxim Integrated's line of quad voltage supervisors, offering compact solutions for multi-rail power management. The O variant specifically addresses applications requiring monitoring of mixed positive and negative supply voltages alongside standard logic levels like 3.3 V and 5 V. This series replaces older discrete monitoring circuits with a single integrated solution.

Replacement Considerations

MAX6338IUB+T

FAQ

Does the MAX6338OUB+ include a manual reset input?

No, the MAX6338OUB+ does not feature a manual reset input; it relies solely on automatic voltage threshold detection.

What is the maximum supply voltage for the MAX6338OUB+?

The maximum supply voltage for the MAX6338OUB+ is 5.5 V.