LM339NS

Overview

The LM339NS is a quad differential voltage comparator manufactured by Texas Instruments, designed for operation from a single power supply. It features four independent comparators with open-collector outputs, allowing flexible interfacing with various logic families. The device operates within a wide common-mode input voltage range that includes ground, making it suitable for diverse sensing applications. Key electrical characteristics include a typical propagation delay of 1.3 microseconds and a maximum supply current of 500 microamperes per channel. It supports supply voltages ranging from 2 volts to 30 volts and functions reliably across an operating temperature range of 0 degrees Celsius to 70 degrees Celsius.

Feature Summary

• Quad differential input configuration for multi-channel signal comparison
• Open-collector output structure enabling wired-AND connections and level shifting
• Wide single-supply voltage operational capability including ground reference
• Low power consumption profile suitable for battery-operated systems

Applications

• Temperature monitoring and control circuits
• Over-voltage and under-voltage protection systems
• Window comparator designs for threshold detection
• Logic level translation between different voltage domains

Procurement Notes

Verify the specific package variant and suffix codes against official Texas Instruments documentation to ensure compatibility with your PCB layout requirements. Confirm the manufacturing date code and RoHS compliance status prior to procurement, as component revisions may affect pinout or material specifications. Cross-reference the ordering part number with the manufacturer's current lifecycle status to avoid obsolescence risks during production.

Selection Notes

Select this component when a low-cost, general-purpose quad comparator is required for single-supply applications. Consider the open-collector output limitation which necessitates external pull-up resistors for proper high-state logic levels. Evaluate the propagation delay and offset voltage specifications against your signal speed and accuracy requirements compared to faster or precision alternatives in the same family.

Part Context

The LM339 series represents a widely adopted standard in analog signal processing, offering a robust solution for basic voltage comparison tasks. As a quad comparator, it consolidates four independent units into a single package, reducing board space and component count. This family is known for its reliability and ease of use in industrial and consumer electronics, serving as a foundational building block for threshold detection and waveform generation circuits.

Replacement Considerations

Compatible substitutes include the LM339N, LM339AN, and LM339NE3 from Texas Instruments, which share identical functional pinouts and electrical characteristics. Other manufacturers offer pin-compatible equivalents such as the MC3391 or LM339 variants from Onsemi, provided they meet the specific voltage and current requirements of the design.