MAX971CUA

Comparators Overview

The MAX971CUA+T is a single-channel analog comparator from the Maxim Integrated family, housed in an 8-pin µMAX surface-mount package. It operates on a single supply voltage ranging from 2.5V to 11V or dual supplies of ±1.25V to ±5.5V. The device features ultra-low quiescent current consumption of 3.2µA typical at 25°C and includes an internal 1.182V precision voltage reference with ±1% accuracy. It provides open-drain outputs capable of sinking up to 50mA, with a propagation delay of 12µs at 10mV overdrive. The input common-mode range extends from the negative rail to within 1.3V of the positive rail.

Comparators Feature Summary

• Ultra-low power consumption suitable for battery-operated systems
• Integrated 1.182V precision bandgap voltage reference
• Open-drain output configuration allows wire-ORed connections
• Programmable hysteresis via dedicated HYST pin

Comparators Applications

• Battery-powered threshold detectors
• Window comparators for voltage monitoring
• Level translators between different logic families
• Oscillator circuits requiring low power draw

Comparators Procurement Notes

Verify the specific suffix '+T' indicates reel packaging when sourcing. Confirm the 'C' designation corresponds to the commercial temperature range of 0°C to +70°C. Ensure compatibility with the 8-pin µMAX footprint during PCB layout. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components.

Comparators Selection Notes

Select this component for applications requiring minimal static power dissipation. The integrated reference eliminates external resistor networks for fixed thresholds. Consider the open-drain output requirement for pull-up resistors if interfacing with higher voltage logic levels. Verify that the 12µs propagation delay meets the timing requirements of the target application.

Comparators Part Context

This device belongs to the MAX971–MAX974 series of micropower comparators. It shares architectural similarities with the MAX981–MAX984 series but differs in reference accuracy and hysteresis availability. The MAX971 variant specifically offers a single channel with an internal reference, distinguishing it from the dual-channel MAX972 which lacks these features.

Comparators Replacement Considerations

The MAX972CUA+T serves as a direct physical replacement if the internal reference and hysteresis capabilities are not required. Designers must account for the absence of the 1.182V reference and programmable hysteresis when substituting with the MAX972 variant.