MAX6429LQUR+T

Overview

The MAX6429LQUR+T is a low-power, single-level battery monitor with internal hysteresis, manufactured by Maxim Integrated (Analog Devices Inc.). It operates in an SOT-23-3 package and supports RoHS compliance. The device monitors single lithium-ion cells or multicell alkaline/NiCd/NiMH power supplies. When the supply voltage drops below a specified low threshold, the output asserts; it deasserts when voltage rises above a high threshold following a minimum 140ms timeout period to ensure 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 ensure supply voltage stability before enabling processor or converter activity.

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and lead times prior to ordering. Note that this specific part number may be subject to end-of-life status or tariff regulations depending on the shipping destination. Ensure the SOT-23-3 package matches your PCB footprint requirements.

Selection Notes

Select this component for applications requiring simple, low-power battery level monitoring without complex communication interfaces. It is suitable for systems needing a single threshold detection with built-in hysteresis. Consider the 140ms delay when designing startup sequences for microprocessors or power converters. Verify that the fixed threshold voltages meet the specific battery chemistry requirements of the target application.

Part Context

The MAX6429LQUR+T belongs to the MAX6427–MAX6438 family of single/dual-level battery monitors. This family includes variants with single or dual output indicators. The MAX6429 specifically offers a single low-battery output. These devices are designed for portable electronics where power conservation and reliable battery state indication are critical.

Replacement Considerations

Other members of the MAX6427–MAX6438 family may serve as functional substitutes if threshold voltages align. Check datasheets for compatible pinouts and electrical characteristics. No direct public substitute part numbers are confirmed for this specific model in the provided documentation.