LM139AW/883

Overview

The LM139AW/883 is a quad differential voltage comparator manufactured by Texas Instruments, designed for operation from a single power supply. It features low offset voltage and low power consumption characteristics suitable for precision applications. The device utilizes a ceramic dual flatpack (DFP) package with 14 pins and a 1.27 mm pin pitch. It operates within a military temperature range of -55°C to +125°C. Key electrical parameters include a maximum average bias current of 0.001 µA, an input offset voltage of 5000 µV, and a nominal response time of 1300 ns. The component supports a peak reflow temperature of 260°C.

Feature Summary

• Quad differential input architecture enabling multiple comparison functions in a single package
• Military-grade temperature rating ensuring reliability in extreme environmental conditions
• Low power consumption combined with low offset voltage for efficient precision sensing
• Open-collector output capability allowing flexible interfacing with various logic families

Applications

• High-reliability aerospace telemetry systems requiring radiation-hardened or verified components
• Precision battery monitoring circuits in defense equipment
• Over-voltage and under-voltage protection modules in military communication gear
• Window comparator implementations in harsh environment sensor interfaces

Procurement Notes

Verify the specific suffix AW/883 indicates compliance with MIL-PRF-38534 or equivalent military standards. Confirm the presence of lead-free plating if RoHS compliance is required for assembly processes, as historical data suggests this variant may not meet modern environmental directives. Ensure the supplier provides full traceability documentation including lot codes and material certifications appropriate for defense contracts.

Selection Notes

Select this component when military qualification and wide temperature stability are mandatory. The LM139AW/883 offers superior thermal endurance compared to commercial equivalents. Consider the DFP package constraints for board layout and thermal management. Verify that the open-collector outputs align with the system's pull-up requirements and voltage levels.

Part Context

This part belongs to the LM139 family of low-power quad comparators originally developed by National Semiconductor and continued by Texas Instruments. The /883 suffix denotes a military-grade version processed under strict quality control standards. It shares functional similarities with the LM239 and LM339 but differs in temperature range and manufacturing specifications.

Replacement Considerations

Public confirmed substitute part numbers: LM139W/883.