MAX6427EIUR

Overview

The MAX6427EIUR+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 supply voltage drops below the specified low threshold, the low-battery output asserts; it deasserts when voltage rises above the high threshold following a minimum 140ms timeout period.

Feature Summary

• Provides single low-battery output indication for three distinct battery conditions: good, weak, or empty.
• Features internal hysteresis to prevent output oscillation during voltage transitions.
• Includes a minimum 140ms 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 'EIUR' against official documentation to confirm exact threshold voltages and temperature grades. Confirm RoHS compliance status via current datasheets. Note that this component may be subject to discontinuation or limited availability; check manufacturer notifications for end-of-life status before finalizing procurement plans.

Selection Notes

Select this component when a single low-battery indicator is sufficient for system power management. Ensure the required low-voltage threshold matches the specific 'E' grade variant specifications. Verify that the SOT-23-3 package footprint aligns with the PCB design constraints and that the operating voltage range covers the intended battery chemistry's discharge curve.

Part Context

The MAX6427EIUR belongs to the MAX6427–MAX6438 family of low-power battery monitors manufactured by Analog Devices/Maxim Integrated. This family includes both single-level (MAX6427–MAX6429) and dual-level variants. The MAX6427 specifically offers a single low-battery output, distinguishing it from dual-output models like the MAX6430 series within the same product line.

Replacement Considerations

Direct substitutes within the same family include other MAX6427 variants with different suffixes indicating varying thresholds or packages, such as MAX6427MRUR+T or MAX6427KSUR+T. Verify that any replacement part maintains the same single-level output configuration and compatible operating voltage range.