LM139ADR

Overview

The LM139ADR is a quad differential analog comparator manufactured by Texas Instruments, housed in a 14-SOIC surface-mount package. It operates within a supply voltage range of 2 V to 36 V and draws a typical quiescent current of 800 µA. The device features an open collector/open drain output capable of sinking up to 6 mA per channel. Key electrical specifications include a maximum input offset voltage of 2 mV, an input bias current of 25 nA, and a propagation delay of 1.3 µs. It supports industrial operating temperatures from -55°C to +125°C.

Feature Summary

• Integrates four independent high-gain differential comparators for multi-channel signal processing.
• Features open-collector outputs compatible with various logic families including CMOS and TTL.
• Designed for wide single-supply operation across a broad voltage range.

Applications

• Temperature sensing circuits
• Voltage level detection systems
• Peak hold circuits

Procurement Notes

Verify the specific suffix 'A' indicates Grade A performance parameters when sourcing. Confirm the 'DR' suffix corresponds to the tape-and-reel packaging format required for automated assembly processes. Ensure the component matches the 14-SOIC footprint dimensions for PCB layout compatibility.

Selection Notes

Select this component for applications requiring multiple comparator channels in a compact surface-mount form factor. Consider the 800 µA quiescent current for power-sensitive designs. Verify that the open-drain output configuration aligns with the pull-up requirements of the downstream circuitry.

Part Context

This part belongs to the LM139 family of quad comparators. It shares functional similarities with the LM239 and LM339 series but offers extended temperature ranges and specific electrical characteristics defined by the 'A' grade designation. The device is widely used in general-purpose analog switching applications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.