What this quad comparator brings to the bench
The Texas Instruments LMV339MX/NOPB is a quad general-purpose comparator in a 14-SOIC package. It runs on a single or split supply from 2.7V to 5.5V, making it a direct fit for 3.3V and 5V logic rails. The output stage supports CMOS, open-collector, and TTL levels, so it can drive a microcontroller input or a relay coil without extra translation. Propagation delay maxes out at 600ns, which is typical for a general-purpose part — fast enough for overcurrent detection and zero-crossing, but not for high-speed PWM feedback loops.
Supply range and temperature — where it works
The supply range of 2.7V to 5.5V covers the common 3.3V and 5V rails, and the -40°C to 85°C operating temperature range qualifies it for industrial control, outdoor telecom, and factory automation. If your board lives in a conditioned server room, that's fine too — the commercial-grade margin is comfortable.
Key specs that matter for your BOM
Quiescent current is 300µA max per device, which keeps the power budget modest in a four-channel design. Input offset voltage is 7mV max at 5V — plenty of margin for threshold detection, but if you need sub-millivolt precision for a window comparator, you'll want a precision part. Input bias current is 0.25µA max at 5V, so high-impedance sources won't load down. Output current is 84mA typical at 5V, enough to drive a logic input or a small LED indicator directly.
Package and footprint
The 14-SOIC package with 0.154-inch body width and 3.90mm width is a standard footprint shared by many quad comparators and op-amps. If you're replacing a failed LM339 in a 14-SOIC layout, check the pinout — the LMV339MX/NOPB follows the same pin arrangement as the classic LM339, so the swap is usually drop-in.
Lifecycle and compliance
The LMV339MX/NOPB is listed as Active in production and ROHS3 compliant. The NOPB suffix means it's lead-free (no lead in the plating), so it meets current RoHS requirements without exception.