MAX6346UR38-T

Overview

The MAX6346UR38-T is a single-input voltage supervisory circuit manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates within a supply voltage range of up to 5.5V and features a fixed threshold voltage of 3.8V. The device provides an active-low, push-pull reset output with a standard reset delay time of 185ms. Designed for surface-mount installation in SOT-23-3 packages, it functions reliably across an industrial temperature range from -40°C to +85°C. With a typical operating supply current of 500nA and accuracy of 1.5%, this component serves as an ultra-low-power solution for monitoring system voltages without requiring external adjustments.

Feature Summary

• Monitors power-supply voltages using a precision bandgap reference and comparator
• Provides reliable circuit protection through internal threshold hysteresis
• Eliminates the need for external components and manual adjustments

Applications

• Battery-powered systems requiring low quiescent current
• Microprocessor (µP) reset supervisory circuits
• General-purpose voltage monitoring in embedded electronics

Procurement Notes

Verify the specific suffix against official documentation, as variations may exist between tape-and-reel and cut-tape packaging formats. Confirm that the UR38 designation corresponds to the intended 3.8V threshold and SOT-23-3 package type. Ensure compatibility with the target operating temperature range and interface requirements before finalizing procurement specifications.

Selection Notes

Select this component when a fixed 3.8V threshold is required for single-channel voltage supervision. Consider the 500nA supply current for battery-sensitive designs. Verify that the active-low push-pull output aligns with the downstream logic requirements. Ensure the SOT-23-3 footprint fits the available board space constraints.

Part Context

This part belongs to the MAX6346 family of ultra-low-power voltage detectors and µP supervisory circuits. These devices are designed to monitor battery, power-supply, and system voltages while consuming minimal power. The family integrates precision references and internally trimmed resistor networks to set specified trip thresholds, ensuring consistent performance across various industrial applications.

Replacement Considerations

Check the MAX6346 datasheet for other threshold variants within the same series that share identical pinouts and electrical characteristics. Verify if alternative manufacturers offer compatible single-input supervisors with matching 3.8V thresholds and SOT-23-3 packaging.