MAX9042AEUA-T

Overview

The MAX9042AEUA-T is a micropower, single-supply integrated circuit featuring two comparators and one precision voltage reference. It operates from a 2.5V to 5.5V supply with typical quiescent current of 55µA. The device includes a 2.048V reference with ±0.4% initial accuracy (A grade) and 6ppm/°C temperature coefficient. Comparators offer rail-to-rail inputs extending 250mV beyond rails, internal ±3mV hysteresis, and push-pull outputs sourcing/sinking up to 8mA. Propagation delay is typically 400ns at 100mV overdrive.

Feature Summary

• Dual comparators combined with a precision voltage reference in a single package
• Rail-to-rail input common-mode range extending 250mV beyond supply rails
• Internal hysteresis ensures clean output switching for slow-moving signals
• Unique output stage design minimizes supply current surges during switching

Applications

• Precision battery management systems
• Window comparator circuits
• Infrared (IR) receivers
• Level translators
• Digital line receivers

Procurement Notes

Verify the specific suffix 'EUA' corresponds to the 8-pin µMAX package as listed in the official selector guide. Confirm the 'A' grade designation indicates the 0.4% initial accuracy specification. Ensure the trailing '-T' denotes tape-and-reel packaging if required by assembly processes. Cross-reference the manufacturer part number against the latest Analog Devices documentation to confirm current production status and any potential obsolescence notices.

Selection Notes

Select this component when dual comparison functions are required alongside a stable voltage reference in space-constrained designs. The low supply current makes it suitable for battery-operated applications. Choose the A grade for higher initial accuracy requirements. Consider the 8-pin µMAX package dimensions for PCB layout compatibility. Verify that the 400ns propagation delay meets the timing requirements of the target application.

Part Context

The MAX9042 belongs to the MAX9038–MAX9043 family of micropower comparators with integrated references. These devices are designed for low-voltage, single-supply operation. The MAX9042 specifically integrates two comparators and one reference, distinguishing it from single-comparator variants like the MAX9040 or MAX9041. The family shares similar electrical characteristics but varies in comparator count and reference voltage options.

Replacement Considerations

The MAX9042BEUA-T is a pin-compatible alternative with B grade reference accuracy (1% initial accuracy). Other family members such as the MAX9040 or MAX9041 offer single comparators and may require different pin configurations.