LM139AJRLQMLV

Overview

The LM139AJRLQMLV is a quad differential comparator manufactured by Texas Instruments, designed for high-reliability applications. It operates within a supply voltage range of 2 V to 36 V and features an open-collector output configuration. The device ensures low offset voltage performance with a maximum input offset voltage of 5 mV and low input bias current of 25 nA. It supports a wide operating temperature range from -55°C to +125°C and utilizes a 14-lead ceramic dual in-line package (CDIP) for robust environmental resistance.

Feature Summary

• Quad differential architecture providing four independent comparison channels within a single component
• Open-collector output structure enabling flexible logic interfacing and voltage level translation
• Low power consumption characteristics suitable for battery-operated or energy-constrained systems
• High reliability construction utilizing ceramic packaging for harsh environment operation

Applications

• Military aerospace electronic systems requiring radiation tolerance
• Spacecraft instrumentation and control circuits
• High-reliability industrial monitoring equipment
• Avionics sensor signal conditioning

Procurement Notes

Verify the complete part number including the QMLV suffix to ensure compliance with specific military quality standards. Confirm that the CDIP package type matches the target board layout requirements. Check for updated datasheet revisions to validate electrical parameters against current design specifications. Ensure sourcing channels provide appropriate traceability documentation for qualified components.

Selection Notes

Select this component when high reliability and radiation hardness are critical compared to standard commercial variants. Consider the open-collector output requirement for pull-up resistor implementation in the circuit design. Evaluate the thermal management needs given the ceramic package characteristics and high-temperature operation capabilities. Compare pinout compatibility if replacing existing LM139 family devices in legacy designs.

Part Context

This part belongs to the LM139 family of quad comparators, specifically tailored for space and military environments. The QMLV designation indicates qualification under specific military standards, distinguishing it from commercial versions like the LM139J or LM139DR. It shares functional similarities with other high-reliability comparators but offers distinct packaging and qualification benefits for specialized applications.

Replacement Considerations

LM139-SP serves as a comparable high-reliability alternative within the same manufacturer portfolio.