MAX6429AJUR+T

Overview

The MAX6429AJUR+T is a low-power, single-level battery monitor with internal hysteresis, manufactured by Analog Devices Inc./Maxim Integrated. It belongs to the MAX6427–MAX6438 family and is housed in a SOT-23-3 package. The device monitors 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 140ms timeout. This timeout ensures supply stabilization before enabling power-converter or microprocessor activity.

Feature Summary

• Provides single low-battery output indicator for monitoring battery status
• Features internal hysteresis to prevent output chatter during voltage transitions
• Includes a minimum 140ms timeout period to ensure supply voltage stabilization

Applications

• Monitoring single lithium-ion cells
• Monitoring multicell alkaline power supplies
• Monitoring NiCd/NiMH power supplies

Procurement Notes

Verify the specific suffix 'A' against official Maxim Integrated documentation to confirm the exact threshold voltage and accuracy grade, as standard datasheets may list generic family parameters. Ensure the '+T' designation matches the required reel quantity and tape specifications for surface-mount assembly processes.

Selection Notes

Select this component when a single low-battery warning is sufficient for system management. It is suitable for applications requiring minimal quiescent current and simple hardware-based battery state indication without complex digital interfaces. Consider the SOT-23-3 footprint constraints and operating temperature range requirements.

Part Context

This part is part of the MAX6427–MAX6438 series of battery monitors. While the provided knowledge base contains data for other parts like MAX6459 and MAX6462, the MAX6429 specifically offers single-level monitoring. It serves as a power-supply support circuit for portable electronics relying on battery power sources.

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.

How does the device handle voltage recovery?

When the voltage rises above the specified high threshold, the low-battery output is deasserted following the 140ms minimum timeout period.