MAX6427KQUR-T

Overview

The MAX6427KQUR-T is a low-power, single-level battery monitor from the MAX6427 family, manufactured by Analog Devices Inc./Maxim Integrated. 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 monitors battery conditions, asserting a low-battery output when voltage drops below a specified threshold and deasserting it after rising above a high threshold with a minimum 140ms timeout. It functions across a temperature range of -40°C to +85°C.

Feature Summary

• Provides internal hysteresis for stable low-battery output indication
• Includes a minimum 140ms timeout period to ensure supply voltage stabilization before enabling system activity
• Supports monitoring of single lithium-ion cells or multicell alkaline/NiCd/NiMH power supplies

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 channels due to discontinuation status. Confirm RoHS compliance and package integrity upon receipt. Cross-reference datasheet specifications against design requirements. Ensure handling procedures match surface-mount standards. Validate part markings against official manufacturer documentation.

Selection Notes

Select this component for applications requiring simple, low-power battery level indication without complex communication interfaces. Consider the fixed threshold nature of specific suffixes versus adjustable options in other family members. Evaluate the SOT-23-3 footprint constraints against PCB layout requirements. Assess the 140ms delay impact on system startup timing.

Part Context

The MAX6427 series comprises single/dual-level battery monitors designed for portable electronics. This specific variant belongs to the single-output subset, ideal for basic low-battery warnings. It sits within the broader PMIC category, focusing on power supply support rather than active regulation. The family shares common architectural features like internal hysteresis and timeout logic.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.