Quad comparator for general-purpose threshold and level detection
The Texas Instruments LP339N/NOPB is a quad general-purpose comparator in a 14-DIP through-hole package. It provides four independent comparator channels with CMOS, MOS, or open-collector output options, covering a wide supply range from 2V to 36V (single) or ±1V to ±18V (dual). Typical applications include threshold detection, zero-crossing detectors, window comparators, and level translators in industrial control, instrumentation, and consumer electronics where through-hole assembly is preferred.
Low quiescent current suits battery and power-sensitive designs
Quiescent current maxes at 100µA across the full supply range, making this comparator a fit for power-constrained or battery-backed circuits where every microamp counts. The input bias current is 0.025µA at 5V, and input offset voltage is 5mV at 5V — typical for general-purpose comparators and adequate for rail-to-rail threshold detection without precision trimming.
Output type and drive capability
Outputs are rated for 30mA at 5V typical, with open-collector compatibility for wired-OR configurations or driving loads referenced to a different supply rail. The open-collector output also allows level shifting to higher-voltage logic or relay drivers. CMOS and MOS output options provide flexibility for direct logic interfacing without pull-up resistors.
Temperature grade and environment
Rated for 0°C to 70°C commercial temperature range, this comparator is intended for indoor, office, or appliance environments. Not specified for industrial or automotive extended-temperature operation.
Lifecycle and sourcing
The LP339N/NOPB is listed as Active with ROHS3 compliance. No end-of-life or last-time-buy notice is recorded. For current pricing and availability, submit an RFQ — the part is sourced through independent distribution and confirmed at quote time.