MAX6429CJUR+T

Overview

The MAX6429CJUR+T is a low-power, single-level battery monitor housed in an SOT-23-3 package. It functions as a power supply support circuit designed to monitor single lithium-ion cells or multicell alkaline/NiCd/NiMH power supplies. The device asserts a low-battery output when the supply voltage drops below a specified threshold and deasserts it upon rising above a high threshold following a minimum 140ms timeout period. This mechanism ensures supply stabilization before enabling microprocessor activity.

Feature Summary

• Provides single low-battery output indication for three distinct battery conditions: good, weak, and empty.
• Incorporates internal hysteresis with a minimum 140ms timeout period to ensure voltage stabilization.
• Optimized for monitoring single lithium-ion cells or multicell alkaline, NiCd, and NiMH power supplies.

Applications

• Monitoring single lithium-ion (Li+) battery cells
• Monitoring multicell alkaline power supplies
• Monitoring multicell NiCd power supplies
• Monitoring multicell NiMH power supplies

Procurement Notes

Verify that the ordering suffix 'T' denotes tape-and-reel packaging rather than tube, as this affects handling procedures. Confirm compliance with RoHS and Lead-Free standards through official manufacturer documentation. Ensure the specific threshold voltage matches system requirements, as variants within the MAX6427–MAX6438 family differ by fixed voltage levels. Cross-reference the datasheet revision to confirm electrical characteristics align with current design specifications.

Selection Notes

Select this component when a single low-battery indicator is sufficient for system management. Choose this part over dual-output variants if only one threshold level is required. Consider the SOT-23-3 package size constraints and the low-power consumption profile suitable for portable applications. Verify that the internal hysteresis and timeout features meet the stability requirements of the connected microprocessor or power converter.

Part Context

The MAX6429CJUR+T belongs to the MAX6427–MAX6438 family of single/dual-level battery monitors. While sharing the same core functionality and package options, individual part numbers in this series are distinguished by their specific low-battery threshold voltages. The MAX6429 variant offers a unique threshold setting compared to siblings like the MAX6427 or MAX6428, allowing precise customization for different battery chemistries without external components.

Replacement Considerations

Substitute with other members of the MAX6427–MAX6438 family, such as MAX6427EJUR+T or MAX6428EJUR+T, provided the threshold voltage requirements are met. Ensure the replacement maintains the SOT-23-3 package and single-output configuration. Verify that the substitute part supports the same battery chemistries and operates within the required voltage range.