LM139AWRQMLV

Overview

The LM139AWRQMLV is a quad differential comparator manufactured by Texas Instruments, designed for high-reliability aerospace and defense applications. It features four independent voltage comparators in a single package, offering low power consumption and wide supply voltage operation from 2 V to 36 V. The device supports rail-to-rail output swing and operates over an extended temperature range of -55°C to +125°C. It is qualified under QMLV standards, ensuring robust performance in radiation-hardened environments.

Feature Summary

• Quad differential comparator architecture providing four independent comparison channels
• Qualified under MIL-PRF-38534 QMLV standards for aerospace reliability
• Wide single-supply voltage operation ranging from 2 V to 36 V
• Extended industrial temperature range supporting -55°C to +125°C operation

Applications

• Aerospace electronics systems requiring radiation hardening
• Military communication equipment signal processing
• Defense sensor interface circuits
• High-reliability industrial control systems

Procurement Notes

Verify the specific suffix 'WRQMLV' confirms QMLV qualification status with the manufacturer or authorized distributor. Ensure the order includes proper handling instructions for sensitive aerospace components. Confirm that the packaging meets military-grade requirements for traceability and environmental protection during transit.

Selection Notes

Select this component when radiation hardness and long-term reliability are critical. Compare against standard commercial grades if cost is a primary constraint and radiation exposure is minimal. Verify pin compatibility with existing PCB layouts, as QMLV variants may have specific marking or testing requirements distinct from commercial equivalents.

Part Context

This part belongs to the LM139 family of quad comparators, known for low power and wide voltage operation. The QMLV designation indicates it meets strict military quality and life requirements. It serves as a radiation-tolerant alternative to standard commercial comparators in harsh environments where single-event effects must be mitigated.

Replacement Considerations

Direct substitutes include other QMLV-qualified quad comparators from Texas Instruments or National Semiconductor. Verify electrical parameters such as offset voltage and response time match system requirements. Ensure thermal management solutions are compatible with the specified operating temperature range.