MAX6429ORUR-T

Overview

The MAX6429ORUR-T is a low-power, single-level battery monitor with internal hysteresis, manufactured by Analog Devices Inc./Maxim Integrated. It is designed for monitoring single lithium-ion (Li+) cells or multicell alkaline/NiCd/NiMH power supplies. The device asserts a low-battery output when the supply voltage drops below a specified threshold and deasserts it after rising above a high threshold following a minimum 140ms timeout period. This delay ensures supply voltage stabilization before enabling power-converter or microprocessor activity. It is housed in a compact SOT-23-3 package.

Feature Summary

• Provides single low-battery output indication for three battery conditions: good, weak, or empty.
• Features internal hysteresis to prevent output chatter during voltage transitions.
• Includes a minimum 140ms timeout period to ensure supply voltage stability before system enablement.

Applications

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

Procurement Notes

Verify the specific suffix ORUR-T against official datasheets to confirm package type and revision. Confirm RoHS compliance status as indicated in manufacturer documentation. Ensure the component matches the exact part number for compatibility with existing circuit designs. Check for any obsolete status notices from the manufacturer. Validate that the sourcing channel provides genuine factory-sealed units.

Selection Notes

Select this component for applications requiring simple, low-power battery level monitoring without complex communication interfaces. It is suitable for systems where a single threshold indicates battery depletion. Consider the SOT-23-3 package size for space-constrained designs. Ensure the application voltage range aligns with the device's input specifications. Evaluate if the fixed timeout period meets the system's startup requirements.

Part Context

The MAX6429 is part of the MAX6427–MAX6438 family of single/dual-level battery monitors. These devices are optimized for portable electronics and battery-powered systems. The family offers various threshold options to accommodate different battery chemistries and capacity levels. The MAX6429 specifically provides a single output indicator for basic battery management tasks.

FAQ

What is the purpose of the 140ms timeout period?

The timeout period ensures that supply voltages have stabilized before power-converter or microprocessor activity is enabled, preventing premature activation during transient voltage drops.

Which battery chemistries does the MAX6429 support?

It supports single lithium-ion (Li+) cells and multicell alkaline, NiCd, and NiMH power supplies.