MAX6427EIUR+T

Overview

The MAX6427EIUR+T is a low-power, single-level battery monitor with internal hysteresis, manufactured by Analog Devices Inc. under the Maxim Integrated brand. 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 power-supply voltages to indicate three battery conditions: good, weak, or empty. When the voltage drops below the specified threshold, the output asserts; it deasserts after rising above the high threshold following a minimum timeout period. This component is designed for monitoring single lithium-ion cells or multicell alkaline/NiCd/NiMH supplies.

Feature Summary

• Provides single low-battery output indication for system power management
• Features internal hysteresis to prevent output chatter during voltage transitions
• Includes a minimum timeout period to ensure supply voltage stabilization before enabling system activity

Applications

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

Procurement Notes

Verify the specific suffix 'EI' against official manufacturer documentation to confirm temperature grade and availability status. Cross-reference the exact part number with current datasheets as product lifecycles may have changed. Confirm RoHS compliance details directly from the source data sheet prior to procurement planning.

Selection Notes

Select this component when a single low-battery indicator is required for portable systems. Ensure the operating voltage range covers the battery pack's discharge curve. Verify that the SOT-23-3 package fits the PCB layout constraints. Consider the internal hysteresis characteristics for noise immunity in the target application environment.

Part Context

This device belongs to the MAX6427–MAX6438 family of low-power battery monitors. The MAX6427 specifically offers a single low-battery output, distinguishing it from dual-output variants like the MAX6430 series. It serves as a power supply support circuit within the broader PMIC category, focusing on battery health detection rather than active regulation.

Replacement Considerations

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