MAX6429MSUR+T

Overview

The MAX6429MSUR+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 consumes typical current of 1µA. The device features a factory-trimmed low-battery output (LBO) threshold of 2.9V with a minimum timeout period of 140ms to ensure voltage stabilization. It is available in a compact SOT-23-5 surface-mount package and is specified for operation across an industrial temperature range.

Feature Summary

• Provides a single low-battery output indicator to signal when supply voltage drops below a specific threshold
• Incorporates internal hysteresis to prevent output chatter during voltage transitions near the threshold
• Includes a minimum timeout period to stabilize supply voltages before enabling power-converter or microprocessor activity

Applications

• Monitoring single lithium-ion cells in portable electronic devices
• Monitoring multicell alkaline, NiCd, or NiMH power supplies
• Indicating weak battery conditions for low-power mode operation
• Signaling empty battery status to disable system functionality

Procurement Notes

Verify the exact suffix 'MSUR' against official datasheets to confirm the specific threshold voltage and package variant. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the ordering quantity meets manufacturer requirements for non-standard versions if applicable. Validate that the component matches the intended thermal and electrical specifications for the target application environment.

Selection Notes

Select this component when a single low-battery warning is sufficient for system power management. Choose this part over dual-output variants if only one threshold level is required. Consider the 1µA quiescent current for battery-sensitive applications. Verify that the 140ms timeout aligns with system startup timing requirements. Ensure the SOT-23-5 package fits the PCB layout constraints.

Part Context

The MAX6429 belongs to the MAX6427–MAX6438 family of low-power battery monitors. This family includes both single-level and dual-level output options. The MAX6429 specifically offers a single low-battery output with factory-trimmed thresholds. It shares common features like internal hysteresis and low current consumption with other members of the series, such as the MAX6427 and MAX6428.

Replacement Considerations

Compatible substitutes within the same family include MAX6427 and MAX6428, provided their specific threshold voltages match the design requirements. Verify pinout compatibility and package dimensions before substitution. Ensure the replacement part maintains the same low-power characteristics and timeout behavior.