LM339 Quad Comparator IC (DIP)

Product Overview: LM339 Quad Comparator IC (DIP)

The LM339 Quad Comparator IC (DIP) contains four independent precision voltage comparators in one standard DIP package. Designed for reliable decision-making in analog and mixed-signal circuits, the LM339 compares input voltages and provides digital-level outputs through open-collector stages that are easy to interface with pull-up resistors and logic families.

Key Features

• Four independent voltage comparators in one IC
• Open-collector outputs for direct logic interfacing and wired-OR configurations
• Wide operating voltage range: 2V to 36V (single supply) or ±1V to ±18V (dual supply)
• Low power consumption, making it suitable for portable and battery-powered applications
• High precision and fast response time for accurate threshold detection
• Standard DIP package for easy prototyping and breadboard use

Applications and Use Cases

• Voltage monitoring and level detection circuits
• Zero-crossing detectors for AC sensing
• Oscillator and waveform generator comparator stages
• Window comparators and pulse detection
• Sensor signal conditioning and threshold interfacing
• General-purpose analog-to-digital signal comparison

Technical Details and Typical Specifications

• Comparators per IC: 4 independent channels
• Output type: Open-collector (requires external pull-up resistor)
• Supply voltage: 2V to 36V (single) or ±1V to ±18V (dual)
• Package: Standard DIP for through-hole prototyping
• Performance: Low power operation, fast response for common comparator tasks

Design Tips and Typical Circuits

• Always use an appropriate pull-up resistor on each open-collector output to match the logic level of the interfaced circuit.
• Include input protection (small series resistors or clamping diodes) when comparing signals that may exceed the supply rails.
• For noisy signals, add hysteresis (positive feedback) to prevent output chatter near threshold points.
• When powering multiple comparators from a single supply, decouple supply pins with a local bypass capacitor to reduce transient noise.

Why Choose LM339 for Your Project

The LM339 Quad Comparator IC offers a balance of precision, flexibility and ease of use. Its ability to operate over a wide supply range and interface directly with digital logic via open-collector outputs makes it a go-to choice for students, hobbyists and professional designers building voltage detectors, sensor interfaces and timing circuits.

Ordering and Packaging

This product is supplied in a standard DIP package, ideal for breadboarding and through-hole PCB assembly. Check the product listing for package quantity and availability.

Note: Images are for Illustration Purposes Only