MAX6429KTUR+T

Overview

The MAX6429KTUR+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 1.0V to 5.5V and draws a typical quiescent current of 1µA. The device features a push-pull low-battery output (LBO) that asserts when the input voltage drops below a factory-trimmed threshold. It includes a minimum 140ms timeout period to ensure stable logic states before system activity resumes. The component is housed in a compact SOT-23-3 surface-mount package and is qualified for automotive applications under AEC-Q100 standards.

Feature Summary

• Provides a single low-battery output indicator with internal hysteresis to prevent output chatter during voltage transitions.
• Features a guaranteed valid LBO logic state down to a supply voltage of 1.0V, ensuring reliable monitoring even at low power levels.
• Includes a minimum 140ms timeout period to allow supply voltages to stabilize before enabling power-converter or microprocessor activity.

Applications

• Monitoring single lithium-ion (Li+) cells for battery status indication
• Monitoring multicell alkaline, NiCd, or NiMH power supplies
• Indicating battery conditions such as good, weak, or empty states in portable devices

Procurement Notes

Verify the specific suffix 'K' against the official datasheet to confirm the exact factory-trimmed threshold voltage, as this parameter defines the operational switching point. Confirm the 'U' indicates the tape-and-reel packaging format if reel handling is required for assembly. Ensure the '+T' designation aligns with the intended environmental compliance and lead-free specifications for your manufacturing process.

Selection Notes

Select this component when a single low-battery warning is sufficient for the application architecture. It is suitable for designs requiring minimal quiescent current to extend battery life. Consider alternative family members if dual-level monitoring or user-adjustable thresholds are necessary, as this specific part offers fixed factory-trimmed thresholds optimized for standard cell voltages.

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, with options for push-pull or open-drain configurations. They are ideal for portable electronics where power conservation and accurate voltage monitoring are critical.

Replacement Considerations

Direct substitutes within the same family include MAX6427, MAX6428, MAX6430, MAX6431, MAX6432, MAX6433, MAX6434, MAX6435, MAX6436, MAX6437, and MAX6438, provided the threshold voltage and output configuration match the design requirements.