MAX6429CHUR+T

Overview

The MAX6429CHUR+T is a low-power, single-level battery monitor with internal hysteresis from the Maxim Integrated family. It operates within a supply voltage range of 1V to 5.5V and consumes only 1µA typical current. The device features factory-trimmed thresholds, specifically a high threshold of 3.0V and a low threshold of 2.9V for this suffix. It provides an open-drain Low Battery Output (LBO) that asserts when voltage drops below the low threshold and deasserts after rising above the high threshold following a 140ms minimum timeout. Packaged in a compact SOT-23-3 format.

Feature Summary

• Provides single low-battery output indication with internal hysteresis to prevent noise-induced toggling
• Features factory-trimmed voltage thresholds ensuring precise monitoring without external components
• Includes a minimum 140ms timeout period to ensure supply voltage stabilization before system enablement
• Operates with ultra-low quiescent current suitable for battery-powered applications

Applications

• Monitoring single lithium-ion cells or multicell alkaline/NiCd/NiMH power supplies
• Indicating three battery conditions: good, weak, or empty for system mode control
• Low-power microprocessor systems requiring reliable battery status detection

Procurement Notes

Verify the specific suffix CHUR against the manufacturer's official datasheet to confirm the exact threshold voltages and package type. Ensure compatibility with the target system's voltage range and logic requirements. Confirm RoHS compliance status as indicated in the component marking. Cross-reference the part number with authorized distributors to validate authenticity and availability.

Selection Notes

Select this component when a fixed, factory-calibrated low-battery threshold is required without the need for user-adjustable resistors. It is suitable for designs prioritizing minimal board space and low standby current. Consider the open-drain output configuration for interfacing with various logic levels. Verify that the 140ms timeout aligns with the system's startup timing constraints.

Part Context

This component belongs to the MAX6427–MAX6438 series of low-power battery monitors. These devices are designed to replace discrete comparator circuits, offering integrated hysteresis and timeout functions. The series supports both single and dual-output configurations, catering to diverse battery management needs in portable electronics.

Replacement Considerations

Compatible substitutes include other parts from the MAX6427–MAX6438 family with matching threshold specifications. Ensure any replacement maintains the same package footprint and electrical characteristics, particularly the quiescent current and output drive capability.