LM239DR

Overview

The LM239DR is a quad general-purpose differential voltage comparator manufactured by Texas Instruments. It features four independent comparators in a 14-pin SOIC package, designed for operation from a single power supply. The device supports a wide supply voltage range of 2 V to 30 V and includes an open-collector output configuration compatible with CMOS and TTL logic families. Key electrical specifications include a maximum input offset voltage of 5 mV, a typical response time of 300 ns, and a quiescent supply current of 500 µA. It operates within a temperature range of -25°C to +85°C.

Feature Summary

• Integrates four independent high-gain differential comparators within a single integrated circuit.
• Features open-collector outputs that facilitate wired-AND connections and compatibility with various logic families.
• Designed for stable operation using a single power supply source across a wide voltage spectrum.
• Provides low power consumption suitable for battery-operated or energy-efficient applications.

Applications

• Overvoltage and undervoltage detection circuits
• Window comparator designs
• Simple timer and pulse generation circuits
• Level shifting and digital interface buffering

Procurement Notes

Verify the specific suffix 'DR' indicates the tape-and-reel packaging format on the 14-SOIC body. Confirm RoHS compliance status as detailed in the manufacturer's official documentation. Ensure the operating temperature grade matches the industrial range requirements of the target design. Cross-reference the ordering part number with the latest datasheet revision to confirm pinout and electrical characteristics remain unchanged.

Selection Notes

Select this component when a quad comparator configuration is required in a surface-mount form factor. It is appropriate for designs needing open-collector outputs to interface with different voltage logic levels. Consider the 300 ns propagation delay for timing-sensitive applications. Evaluate the 5 mV input offset voltage against the precision requirements of the signal being monitored.

Part Context

This device belongs to the LMx39 family of quad comparators from Texas Instruments. It shares functional similarities with the LM139 and LM339 but offers specific performance trade-offs regarding temperature range and supply voltage limits. The DR suffix denotes a specific reel-based packaging option within the broader LM239 product line, distinguishing it from tube-packaged variants like the LM239D.

Replacement Considerations

LM139DR: Offers extended temperature range and rail-to-rail output capabilities. LM339DR: Provides similar functionality with commercial temperature grading. LM2901: Pin-compatible alternative with improved speed and lower offset voltage specifications.