MAX9042AESA+T

Overview

The MAX9042AESA+T 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 SOIC package. The device operates on a supply voltage range of 2.5V to 5.5V with a typical quiescent current of 55µA. It provides rail-to-rail inputs and outputs, ±3mV internal hysteresis, and a propagation delay of 400ns. The built-in reference outputs 2.048V with A-grade accuracy.

Feature Summary

• Integrates dual comparators with a precision voltage reference in a compact surface-mount package
• Features rail-to-rail input and output stages capable of sinking and sourcing up to 8mA
• Includes internal hysteresis to ensure clean switching for slow-moving signals
• Utilizes a unique output stage design that minimizes supply current surges during transitions

Applications

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

Procurement Notes

Verify the specific 'A' grade designation for initial accuracy requirements. Confirm the '+T' suffix indicates tape-and-reel packaging. Ensure the 8-SOIC footprint matches the target PCB layout. Check for RoHS compliance status as indicated by the '+' symbol. Validate operating temperature range specifications against environmental constraints.

Selection Notes

Select this component when low power consumption is critical alongside precise voltage referencing. The dual comparator configuration allows for complex threshold monitoring without additional external components. Consider the rail-to-rail capability for interfacing with various logic families. Evaluate the 400ns propagation delay against system timing requirements.

Part Context

This part belongs to the MAX9038–MAX9043 family of micropower comparators. It shares architectural similarities with other members like the MAX9041 and MAX9043 but offers dual comparators instead of single or uncommitted inputs. The device is designed for battery-operated applications requiring high efficiency and minimal supply glitches.

Replacement Considerations

Check for pin-compatible alternatives within the same MAX90xx series. Verify if B-grade versions meet accuracy needs. Ensure any substitute maintains the 2.048V reference output and 8-SOIC package dimensions.