MAX6429KTUR

Overview

The MAX6429KTUR 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 consumes typical current of 1µA. The device features a factory-trimmed low-battery output threshold of 2.85V with a high threshold of 3.15V, providing a 300mV hysteresis window. It utilizes an open-drain LBO output and includes a minimum timeout period of 140ms to ensure supply voltage stabilization before enabling system activity. The component is specified for operation over a temperature range of -40°C to +85°C and is housed in a compact SOT-23-3 package.

Feature Summary

• Provides single low-battery output indication with internal hysteresis to prevent output chatter during voltage transitions.
• Features a guaranteed valid logic state down to a supply voltage of 1.0V, ensuring reliable monitoring of depleted cells.
• Includes a minimum timeout period to allow power-supply voltages to stabilize before activating downstream converters or processors.

Applications

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

Procurement Notes

Verify the specific suffix 'K' against official manufacturer documentation to confirm the exact factory-trimmed threshold values, as these vary across the MAX6427–MAX6438 family. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may be restricted due to product lifecycle status. Ensure the ordering information matches the required pinout and package type for your PCB layout.

Selection Notes

Select this component when a fixed, factory-trimmed low-battery threshold is preferred over user-adjustable options found in other family members like the MAX6433 series. It is suitable for applications requiring minimal external components and low quiescent current. Consider the MAX6429KTUR if the specific 2.85V/3.15V thresholds align with the battery chemistry's discharge curve requirements.

Part Context

The MAX6429KTUR belongs to the MAX6427–MAX6438 family of low-power battery monitors. This family offers both factory-trimmed and user-adjustable threshold options in small SOT-23 and SOT-143 packages. The MAX6429 specifically provides a single low-battery output indicator, distinguishing it from dual-output variants in the same series.

Replacement Considerations

Compatible substitutes within the same family include MAX6427, MAX6428, MAX6430, MAX6431, MAX6432, MAX6433, MAX6434, MAX6435, MAX6436, MAX6437, and MAX6438, provided their respective threshold specifications match the design requirements.