MAX6440UTKQSD3-T

Overview

The MAX6440UTKQSD3-T is a single-cell battery monitor from the MAX6439–MAX6442 family, designed for ultra-low-power applications. It features factory-trimmed thresholds with a high threshold of 2.3V and a low threshold of 1.7V. The device operates within a supply voltage range of 1V to 5.5V and supports an operating temperature range of -40°C to +85°C. Packaged in a compact SOT-23-6 surface-mount case, it integrates a microprocessor supervisor with manual reset functionality.

Feature Summary

• Integrates dual low-battery output options to signal battery status levels including OK, low, and dead conditions.
• Includes an independent microprocessor supervisor that monitors VCC and provides an active-low reset output.
• Supports manual system reset via push-button without requiring external components.

Applications

• Single-cell lithium-ion battery monitoring systems
• Multicell alkaline or NiCd/NiMH battery management
• Low-power portable electronic devices requiring battery status alerts

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when ordering. Confirm compatibility with the target PCB footprint for the SOT-23-6 package. Ensure the fixed threshold voltages align with the battery chemistry requirements. Check current availability status as distribution may vary by region.

Selection Notes

Select this component for designs requiring precise, factory-trimmed voltage thresholds without external resistors. It is suitable for applications needing both battery health monitoring and processor reset supervision in a minimal footprint. Consider the fixed 2.3V/1.7V thresholds against the specific battery discharge curves of the intended power source.

Part Context

This part belongs to the MAX6439–MAX6442 family of low-power battery monitors. These devices are engineered to provide comprehensive power management support by combining battery level detection with microprocessor supervision. The family offers various threshold combinations to suit different battery chemistries and system requirements.

Replacement Considerations

Other parts in the MAX6440 series with different suffixes (e.g., UTLTSD3+T) offer alternative threshold values such as 2.6V/1.7V. Verify that the specific voltage trip points of any substitute match the application's critical low-battery cutoff requirements.