MAX6429NTUR+T

Overview

The MAX6429NTUR+T is a low-power, single-level battery monitor from the MAX6427–MAX6438 family. It operates within a supply voltage range of 1.6 V to 5.5 V and is housed in an SOT-23-3 package. Designed for monitoring single lithium-ion cells or multicell alkaline/NiCd/NiMH power supplies, it asserts a low-battery output when voltage drops below a specified threshold. The device includes internal hysteresis and a minimum 140ms timeout period to ensure supply voltage stabilization before enabling system activity.

Feature Summary

• Provides single low-battery output indication for three distinct battery conditions: good, weak, and empty.
• Features internal hysteresis to prevent output oscillation during voltage transitions.
• Includes a minimum 140ms timeout period to allow supply voltages to stabilize before system enablement.

Applications

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

Procurement Notes

Verify component status carefully as this part may be obsolete or discontinued. Confirm availability through authorized distributors only. Ensure the SOT-23-3 package matches your PCB footprint requirements. Check RoHS compliance documentation for specific manufacturing lot details. Validate that the single-level monitoring configuration meets your system's low-battery detection needs.

Selection Notes

Select this component when a single low-battery threshold is sufficient for system management. It is suitable for applications requiring minimal external components due to integrated hysteresis. Consider the 1.6 V to 5.5 V operating range to ensure compatibility with the target power supply. Evaluate the SOT-23-3 package size constraints against available board space.

Part Context

This device belongs to the MAX6427–MAX6438 series of battery monitors. The family offers both single-level (MAX6427/MAX6428/MAX6429) and dual-level options. These devices are designed for portable electronics requiring efficient power management. The MAX6429 specifically provides one low-battery indicator, distinguishing it from dual-output variants in the same series.

Replacement Considerations

Compatible substitutes within the same family include MAX6427MRUR+T and MAX6429EJUR+T. Verify pinout and package compatibility (SOT-23-3) before substitution. Ensure the replacement part supports the required single-level monitoring function and operating voltage range.