MAX6428DHUR+

Overview

The MAX6428DHUR+ is a single-level battery monitor IC manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 1.5V to 6V and features a low-battery output threshold of 2.8V. The device utilizes a SOT-23-3 surface-mount package and functions as a power-supply support circuit for monitoring single-cell lithium-ion or multicell alkaline/NiCd/NiMH batteries. It includes internal hysteresis and a minimum timeout period to ensure supply voltage stabilization before enabling system activity.

Feature Summary

• Provides single low-battery output indication for monitoring battery conditions
• Features internal hysteresis to prevent output oscillation during voltage transitions
• Includes a minimum timeout period to ensure supply voltages stabilize before system enablement

Applications

• Monitoring single lithium-ion (Li+) cells
• Monitoring multicell alkaline, NiCd, or NiMH power supplies
• Indicating battery good, weak, or empty states in portable systems

Procurement Notes

Verify the specific suffix DHUR against the official datasheet to confirm the exact threshold voltage and packaging configuration. Ensure compatibility with the target application's supply voltage range and logic levels. Check for obsolescence status or lifecycle changes directly from the manufacturer, as availability may be restricted.

Selection Notes

Select this component when a simple, low-power solution is required for single-threshold battery monitoring. It is suitable for applications needing to distinguish between normal operation, low-power mode, and system disable based on a single voltage level. Consider the SOT-23-3 package size constraints and the specific 2.8V threshold requirement for the battery chemistry in use.

Part Context

The MAX6428DHUR+ belongs to the MAX6427–MAX6438 family of low-power, single/dual-level battery monitors with hysteresis. This family is designed to indicate three battery conditions: good, weak, or empty. The MAX6428 specifically provides a single low-battery output indicator, distinguishing it from dual-output variants in the same series.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.