MAX6429BHUR+T

Overview

The MAX6429BHUR+T is a low-power, single-output battery monitor from the MAX6427–MAX6438 family. It operates within a supply voltage range of 1.6 V to 5.5 V and functions in an SOT-23-3 surface-mount package. The device monitors single lithium-ion cells or multi-cell alkaline/NiCd/NiMH power supplies. It asserts a low-battery output when voltage drops below a specified threshold and deasserts it after rising above a high threshold, following a minimum 140ms timeout period for stabilization.

Feature Summary

• Provides internal hysteresis for reliable low-battery detection across various chemistries
• Includes a minimum 140ms timeout period to ensure supply voltage stabilization before enabling system activity
• Supports indication of three distinct battery conditions: good, weak, and empty

Applications

• Monitoring single lithium-ion (Li+) cells
• Monitoring multi-cell alkaline power supplies
• Monitoring NiCd and NiMH battery systems

Procurement Notes

Verify component authenticity through authorized channels due to discontinuation status. Confirm RoHS compliance details via official documentation. Validate that the specific suffix corresponds to the required factory-trimmed specifications. Ensure compatibility with existing PCB footprints for the SOT-23-3 package. Review end-of-life notifications for long-term supply planning.

Selection Notes

Select this component for applications requiring precise monitoring of Li+, alkaline, NiCd, or NiMH batteries. Consider the 1.6 V to 5.5 V operating range for suitability. Evaluate the need for internal hysteresis to prevent output oscillation. Assess the 140ms timeout requirement against system startup timing constraints. Verify package availability for surface-mount assembly.

Part Context

This part belongs to the MAX6427–MAX6438 series of single/dual-level battery monitors. These devices are designed to indicate battery health states by asserting outputs based on voltage thresholds. The series supports multiple battery chemistries and includes options for single or dual low-battery indicators to manage normal, low-power, and disabled system modes.

Replacement Considerations

Public confirmed substitute part numbers are not available.