MAX6328XR22

Overview

The MAX6328XR22 is a single-channel supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of up to 5.5V and features a fixed reset threshold of 2.2V. The device provides an active-low, open-drain reset output with a minimum timeout period of 100ms. Designed for surface-mount installation in SOT-23-3 packages, it functions reliably across an industrial temperature range of -40°C to +85°C. The component consumes low quiescent current, making it suitable for power-sensitive applications requiring precise voltage monitoring.

Feature Summary

• Monitors a single power-supply voltage channel with a factory-set threshold.
• Provides an active-low reset signal via an open-drain output configuration.
• Ensures stable system initialization through a guaranteed minimum reset timeout delay.

Applications

• Microprocessor (µP) power supply supervision
• Battery-powered equipment voltage monitoring
• Portable instrumentation reset circuits

Procurement Notes

Verify the exact suffix against the manufacturer's official datasheet to confirm the specific threshold voltage and package variant. Ensure compatibility with the target PCB footprint and thermal requirements. Confirm RoHS compliance status if required by project specifications. Cross-reference the part number with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when a fixed 2.2V threshold is required for single-rail monitoring. Consider the open-drain output capability for interfacing with various logic levels. Evaluate the SOT-23-3 package size constraints against available board space. Verify that the 100ms minimum timeout meets the system's startup timing requirements.

Part Context

This part belongs to the MAX6328 series of ultra-low-power microprocessor reset circuits. The series offers various threshold voltages and timeout delays to accommodate different power-supply architectures. It is designed to replace older supervisor ICs while providing improved accuracy and lower power consumption in compact packages.

Replacement Considerations

Check for direct pin-compatible alternatives within the same family, such as other MAX6328 variants with different thresholds. Verify functional equivalence regarding output type and timeout characteristics before substitution.