TILM339N
Overview
The LM339N is a quad, general-purpose voltage comparator featuring four independent channels in a single 14-pin PDIP package. It is designed to operate from a single power supply over a wide range of voltages from 2V to 36V, or from split supplies. Its open-collector output architecture allows for easy interfacing with various logic levels, making it a staple for mixed-signal prototyping.
Why Choose This Part
The LM339N provides four comparators in a breadboard-friendly through-hole package, reducing PCB area or prototyping space. It features a low input bias current of 0.25uA and remains stable across a wide supply voltage range of 2V to 36V. The open-collector outputs allow for wired-OR connections, which simplifies complex logic steering without additional gates.
Applications
Key Specifications
Getting Started
To use the LM339N, connect a bypass capacitor between the VCC and GND pins to ensure stability. Because it uses open-collector outputs, you must connect a pull-up resistor from the output pin to your desired logic voltage (e.g., 3.3V or 5V) to see a high-state signal. For prototyping, this part fits directly into standard 0.1-inch pitch breadboards and requires no specialized toolchain beyond a standard DC power supply and multimeter.
