MAX6431ORUS

Overview

The MAX6431ORUS is a low-power, dual-level battery monitor manufactured by Analog Devices Inc./Maxim Integrated. It features internal hysteresis and provides two independent low-battery output indicators to signal three distinct battery conditions: good, weak, or empty. The device supports monitoring of single lithium-ion cells as well as multicell alkaline, NiCd, and NiMH power supplies. When the supply voltage drops below the specified low threshold, the outputs assert; they deassert after rising above the high threshold following a 140ms minimum timeout period. This timeout ensures supply stabilization before enabling power-converter or microprocessor activity. The component is designed for portable equipment applications requiring efficient battery management.

Feature Summary

• Dual low-battery output indicators provide simultaneous status reporting for critical power thresholds
• Internal hysteresis prevents output oscillation during voltage transitions near threshold levels
• Integrated 140ms minimum timeout period ensures supply voltage stabilization before system activation
• Capable of monitoring single lithium-ion cells and multicell alkaline, NiCd, or NiMH battery packs

Applications

• Monitoring single lithium-ion (Li+) cell voltage levels in portable devices
• Managing multicell alkaline, NiCd, or NiMH power supplies in consumer electronics
• Indicating battery conditions for systems operating in normal, low-power, or disabled modes
• Portable equipment requiring reliable low-battery detection with noise immunity

Procurement Notes

Verify the specific suffix 'ORUS' against official manufacturer documentation to confirm package type, temperature range, and tape/reel specifications. Confirm current availability status as product lifecycles may change. Ensure compatibility with existing board layouts regarding pin configuration and thermal requirements. Cross-reference with the latest datasheet revision for any design-in updates or recommended alternative components.

Selection Notes

Select this component when dual independent low-battery alerts are required for precise power management strategies. It is suitable for designs needing hysteresis to avoid false triggering during marginal voltage states. Consider the 140ms startup delay for timing-critical microprocessor resets. Evaluate suitability for both single-cell Li+ and multi-cell alkaline/NiMH architectures based on threshold settings.

Part Context

The MAX6431 belongs to the MAX6427–MAX6438 family of low-power, single/dual-level battery monitors with hysteresis. While other members offer single outputs, the MAX6431 specifically provides dual indicators. This family is characterized by low supply current and robust performance across various battery chemistries, making it a standard solution for battery-powered portable electronics requiring reliable power state indication.

Replacement Considerations

Within the same family, the MAX6430, MAX6432, MAX6436, MAX6437, and MAX6438 are dual-output variants. The MAX6427, MAX6428, MAX6429, MAX6433, MAX6434, and MAX6435 are single-output alternatives. Verify pinout compatibility and threshold voltage accuracy when substituting.