The LM339N/NOPB is a quad, precision voltage comparator from Texas Instruments. It offers wide supply voltage range, low input bias current, and high output current capability, making it ideal for applications requiring precise signal comparison. The LM339N/NOPB is a low power device and can operate on a single 5V supply making it ideal for use in portable devices, signal processing applications, level detection, etc. It features an open-collector output, making it easy to connect to external circuitry. Additionally, all inputs have TTL and CMOS compatibility, ensuring the part is suitable for use in many logic and digital applications.