LM139AWGRLQMLV

Overview

The LM139AWGRLQMLV is a quad differential comparator manufactured by Texas Instruments, designed for aerospace and high-reliability applications. It operates within a supply voltage range of 2 V to 36 V and features an open-collector output type. The device supports a wide operating temperature range from -55 °C to +125 °C. Key electrical parameters include a maximum input offset voltage of 5 mV and a typical quiescent current of 500 µA. The component is housed in a WG (VSSOP) package with 14 pins.

Feature Summary

• Quad differential comparator architecture providing four independent comparison channels
• Qualified for military and aerospace environments under QML specifications
• Open-collector outputs compatible with various logic families
• Wide single-supply or split-supply voltage operation capability

Applications

• Aerospace electronic systems requiring radiation-hardened components
• Military-grade signal processing circuits
• High-reliability industrial control interfaces
• Spacecraft telemetry and command subsystems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official QML datasheet to ensure compliance with required environmental testing and screening levels. Confirm that the device meets all applicable MIL-PRF-38534 or equivalent standards for the intended mission profile before finalizing procurement.

Selection Notes

Select this component when designing systems that require certified reliability under extreme thermal and potential radiation conditions. Ensure the design accommodates the open-collector output structure, which necessitates external pull-up resistors. Verify that the 5 mV input offset voltage specification aligns with the precision requirements of the application circuit.

Part Context

This part belongs to the LM139 family of low-power quad comparators. While standard commercial versions exist, the LQMLV suffix indicates qualification for military/aerospace use. It serves as a robust alternative to general-purpose comparators in critical infrastructure where failure is not an option.

Replacement Considerations

Direct replacements must match the QML qualification status. Check for equivalents such as the LM139A-MIL or other TI parts with identical pinouts and radiation hardness ratings. Verify that any substitute maintains the same operating temperature range and supply voltage limits.