MAX6429EIUR-T

Overview

The MAX6429EIUR-T is a low-power battery monitor featuring single or dual-level output indicators with internal hysteresis. It operates within an input voltage range of 1V to 6V and draws a typical supply current of 1µA. The device provides factory-trimmed thresholds, including low thresholds from 1.6V to 2.1V or 2.6V to 3.1V in 100mV increments, and high thresholds from 2.3V to 2.6V or 3.3V to 3.6V. It ensures valid logic states down to 1.0V with a minimum 140ms timeout period for stabilization.

Feature Summary

• Integrates internal hysteresis to prevent output chatter during voltage transitions
• Provides push-pull, open-drain, or open-drain LBO output options for flexible interfacing
• Guarantees valid low-battery output logic state even when supply voltage drops to 1.0V

Applications

• Monitoring single lithium-ion (Li+) cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd/NiMH battery packs
• Indicating weak battery conditions for low-power mode operation

Procurement Notes

Verify the specific suffix 'E' indicates the correct factory-trimmed threshold variant required for the application. Confirm the 'U' package designation matches the SOT-23 footprint requirements. Check current availability status as distribution may be limited or subject to factory special orders. Ensure the operating temperature range aligns with system environmental specifications.

Selection Notes

Select this component when ultra-low quiescent current is critical for extending battery life. Choose based on the specific voltage thresholds needed for the target battery chemistry. Consider the output drive type (push-pull vs. open-drain) relative to the downstream microprocessor or power converter interface requirements.

Part Context

This part belongs to the MAX6427–MAX6438 family of low-power battery monitors. These devices are designed to indicate three battery conditions: good, weak, or empty. The family supports both single and dual low-battery outputs, allowing systems to operate in normal mode, switch to low-power mode, or disable entirely based on voltage levels.

Replacement Considerations

Compatible substitutes within the same family include MAX6427, MAX6428, MAX6430, MAX6431, and MAX6432, provided their specific factory-trimmed thresholds match the design requirements.