LM 339

The LM 339 is a precision low-power quad comparator designed for accurate voltage comparison across a wide variety of electronic circuits. Its robust architecture supports reliable operation in many applications while minimizing power consumption. Low supply current of approximately 0.8 mA per comparator for energy-efficient designs. Wide supply voltage range from 2 V to 36 V to accommodate diverse power environments. High voltage gain for enhanced sensitivity and fast response to input changes. Open-collector output enabling wired-AND connections and flexible circuit configurations. Input voltage range that reaches ground level to support single-supply operation. Compared to many older comparator models, the LM 339 provides a balanced combination of low power consumption and versatile input/output characteristics. Its extended input common-mode voltage range and open-collector outputs make interfacing with various logic families straightforward, improving compatibility in mixed-signal systems. The device integrates four comparators in a single package, reducing component count and PCB area. High gain and low offset voltage contribute to improved accuracy in threshold detection and signal processing. These attributes support reliable performance in applications such as voltage monitoring, level detection, window comparators, and basic analog-to-digital interface tasks. The LM 339 is suitable for designers seeking a compact, low-power comparator solution with flexible interfacing options and dependable operation across a broad supply range.