Quad comparator for mixed-signal threshold detection
The LMV339M/NOPB is a quad general-purpose comparator from Texas Instruments, packing four independent comparators into a single 14-SOIC package. Each channel compares two analog voltages and outputs a logic-level signal — useful for window detectors, zero-crossing circuits, and sensor thresholding where you need multiple trip points on one board. The CMOS, open-collector, and TTL-compatible output stage lets you interface directly with a microcontroller GPIO or a logic gate without extra level shifting.
Speed, drive, and quiescent budget
Propagation delay is 600 ns max — fast enough for most sensor and control loops running below 1 MHz, but not for high-speed switching or RF-level comparators. The output can sink or source 84 mA at 5 V, so it can drive an LED indicator or a small relay coil directly through a series resistor. Quiescent current maxes out at 300 µA for all four channels combined — that's 75 µA per comparator, making it a solid fit for battery-powered or power-sensitive designs.
Housed in a 14-SOIC (0.154-inch body width, 3.90 mm), the LMV339M/NOPB is a hand-solderable surface-mount package — fine for prototyping with a fine-tip iron or for reflow assembly. Mounting is surface mount only — no through-hole variant in this order code.