MAX6427ORUR+T

Overview

The MAX6427ORUR+T is a low-power, single-level battery monitor with internal hysteresis, designed for monitoring single lithium-ion cells or multicell alkaline/NiCd/NiMH power supplies. It operates within a supply voltage range of 1.6 V to 5.5 V and functions across an industrial temperature range of -40°C to +85°C. The device utilizes a SOT-23-3 surface-mount package. When the monitored voltage drops below the specified threshold, the output asserts to indicate a weak battery condition. Upon recovery above the high threshold, the output deasserts after a minimum timeout period, ensuring system stability before enabling power-converter or microprocessor activity.

Feature Summary

• Provides single low-battery output indication for three distinct battery states: good, weak, and empty.
• Incorporates internal hysteresis to prevent output chatter during voltage transitions near the threshold.
• Features a minimum timeout period following voltage recovery to ensure supply stabilization before system enablement.

Applications

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

Procurement Notes

Verify component authenticity through authorized channels due to potential availability constraints. Confirm that the specific suffix corresponds to the intended operating temperature range and packaging format. Cross-reference the manufacturer's latest discontinuation notices to ensure long-term viability for new designs. Validate RoHS compliance documentation against current regulatory requirements prior to procurement.

Selection Notes

Select this component when a simple, low-cost solution is required for basic battery level detection without complex communication interfaces. It is suitable for applications where a single warning threshold is sufficient to trigger low-power modes or system shutdown. Consider the SOT-23-3 package size for space-constrained designs requiring minimal footprint.

Part Context

This part belongs to the MAX6427–MAX6438 family of battery monitors from Analog Devices/Maxim Integrated. While other variants in the series offer dual-level outputs or different threshold options, the MAX6427 specifically provides a single low-battery indicator. This simplifies circuit design for applications that do not require multiple stages of battery degradation warnings.

Replacement Considerations

Direct substitutes within the same family include MAX6428 and MAX6429, which share similar functionality but may differ in threshold voltages. Verify that any replacement maintains compatibility with the existing threshold requirements and package dimensions.