MAX9042AESA+

Overview

The MAX9042AESA+ is a micropower, single-supply comparator integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It features two comparators and one precision voltage reference within an 8-pin SO package. The device operates from a supply voltage range of 2.5V to 5.5V with a typical quiescent current of 55µA at 2.7V. The internal voltage reference provides a fixed output of 2.048V. Comparator inputs support rail-to-rail operation with common-mode voltage extending 250mV beyond the supply rails. The output stage delivers rail-to-rail swing capable of sourcing and sinking up to 8mA.

Feature Summary

• Integrates dual comparators with a precision voltage reference in a compact 8-pin SO package
• Features rail-to-rail input and output stages for maximum dynamic range
• Includes internal hysteresis to ensure clean switching on slow-moving signals
• Utilizes unique output design to minimize supply current surges during transitions

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status as indicated by the plus suffix. Check for obsolescence notices or production change notifications prior to procurement. Ensure storage conditions adhere to moisture sensitivity level requirements. Validate that the specific ordering suffix matches the required package type and temperature range specifications.

Selection Notes

Select this component when dual comparison functionality is required alongside a stable voltage reference. The low supply current makes it suitable for battery-operated applications. Verify that the 2.048V reference voltage meets system threshold requirements. Consider the 8-pin SO package dimensions for PCB layout constraints. Ensure the operating voltage range aligns with the available power supply rails.

Part Context

This part belongs to the MAX9038–MAX9043 and MAX9050–MAX9053 family of micropower comparators with precision references. These devices are designed for low-voltage, single-supply operation. The family offers various configurations of single and dual comparators with different reference voltages. The MAX9042 specifically combines dual comparators with a 2.048V reference.

Replacement Considerations

Direct substitutes include other members of the MAX9038–MAX9043 series such as the MAX9041 or MAX9043, provided the pinout and reference voltage compatibility are verified. Cross-referencing electrical characteristics like propagation delay and supply current is essential for functional equivalence.