Quad micropower comparator for slow, battery-conscious boards
The TLC339CDR is a quad general-purpose comparator from the LinCMOS™ family, packing four open-drain comparators into a 14-SOIC package. It draws a maximum quiescent current of 100 µA across its 3 V to 16 V supply range.
Open-drain output — what it means on the bench
Outputs are CMOS open-drain, rated for 20 mA sink each. That lets you wire-OR multiple comparators to a single pull-up resistor, or level-shift to a higher-voltage logic rail (up to the 16 V supply max). No push-pull stage inside, so you need an external pull-up to get a logic-high — factor that into the BOM if you are used to a rail-to-rail output comparator. Input bias current is 5 pA typical at 5 V, so high-impedance sensor inputs or long PCB traces won't load the source noticeably.
Temperature grade and where it fits
Rated 0 °C to 70 °C, so this is a commercial-temperature part. It belongs in indoor equipment, office gear, appliances, and benchtop instruments — not in an engine bay or a rooftop telecom enclosure. The 84 dB CMRR is adequate for general-purpose signal comparison; input offset voltage is 5 mV max at 10 V, which is typical for a non-precision comparator.
Lifecycle and compliance — no surprises
The TLC339CDR is listed as Active on TI's product status, with ROHS3 compliance. No end-of-life notice, no last-time-buy window to track. It can be specified into new production runs without worrying about a sudden phase-out. The 14-SOIC footprint is standard and widely second-sourced, so board layout is straightforward.