LM139JB

Overview

The LM139JB is a quad differential comparator from the LM139-MIL family, housed in a 14-pin Ceramic Dual In-Line Package (CDIP). It operates on single supplies of 2 V to 30 V or dual supplies of ±1 V to ±15 V. Key electrical characteristics include a typical supply current of 0.8 mA, input bias current of 25 nA, and input offset voltage of 2 mV at 25°C. The device features open-collector outputs compatible with TTL, MOS, and CMOS logic levels. It is characterized for operation across the full military temperature range of –55°C to +125°C.

Feature Summary

• Four independent precision voltage comparators designed for wide single or dual supply operation
• Open-collector outputs allow wired-AND functionality and flexible logic level translation
• Input common-mode voltage range includes ground potential
• Differential input voltage range matches the maximum rated supply voltage

Applications

• Industrial control systems
• Automotive infotainment and instrument clusters
• Body control modules
• Power supervision circuits
• Oscillators and peak detectors

Procurement Notes

Verify that the component is sourced as an active production part from Texas Instruments. Confirm the package type is CDIP-14 and check for specific military qualification markings if required by the application. Ensure the ordering suffix 'JB' corresponds to the correct ceramic package variant listed in the manufacturer's orderable addendum.

Selection Notes

Select this component when high reliability over extreme temperatures is required. The LM139JB is suitable for applications needing low power consumption independent of supply voltage. Consider the open-collector output structure for interfacing with various logic families. Validate that the input common-mode range covers the system's signal voltages relative to the supply rails.

Part Context

The LM139JB belongs to the LM139-MIL series, which provides quad comparators qualified for military specifications. This series offers robust performance in harsh environments compared to commercial variants. The device shares functional similarities with other members of the LMx39 family but is distinguished by its hermetic ceramic packaging and extended temperature rating.

Replacement Considerations

LM139J.A serves as a direct equivalent within the same product line.