MAX6429NRUR+T

Overview

The MAX6429NRUR+T is a low-power, single-level battery monitor from the Maxim Integrated 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 surface-mount package. The device functions as a power-supply support circuit with internal hysteresis to indicate battery conditions. It asserts its output when the supply voltage drops below a specified low threshold and deasserts after rising above a high threshold, following a minimum timeout period to ensure voltage stabilization before enabling system activity.

Feature Summary

• Provides single low-battery output indication for monitoring battery health
• Features internal hysteresis to prevent output chatter during voltage transitions
• Includes a minimum timeout period to ensure supply voltage stability before re-enabling system operation

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors due to discontinuation status. Confirm RoHS compliance and lead-free specifications against current manufacturing records. Validate the SOT-23-3 package marking and pinout configuration to ensure compatibility with existing PCB footprints. Review official end-of-life notifications for final purchase deadlines and last-time-buy information.

Selection Notes

Select this component for applications requiring simple, low-power battery level detection without complex communication interfaces. Ensure the specific low-battery threshold voltage matches the target battery chemistry's cutoff requirements. Verify that the SOT-23-3 package size fits the available board space constraints. Consider the operating temperature range of -40°C to +85°C for environmental suitability.

Part Context

This part belongs to the MAX6427–MAX6438 series of single/dual-level battery monitors. These devices are designed to replace traditional comparator-based solutions by integrating precise thresholds and hysteresis into a compact form factor. The series supports various battery chemistries and offers options for single or dual output indicators to manage normal, low-power, and disabled system states efficiently.

Replacement Considerations

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