Six inverters in a single 16-SOIC — the CD4049UBDT from the 4000B family
The CD4049UBDT is a Texas Instruments 4000B-series CMOS hex inverter. It packs six independent inverter gates into a 16-SOIC surface-mount package, each with a single input. The part operates across a 3V to 18V supply range, making it a natural fit for battery-powered or wide-rail industrial logic where the tighter 5V-only 74HC family would need a regulator. Quiescent current maxes at 4 µA, so it adds negligible draw in always-on sections.
Output drive and speed — what the numbers mean for your BOM
Each output can source 4.3 mA and sink 24 mA. Propagation delay is 50 ns at 15V with a 50 pF load.
Temperature grade and environment
Rated for -55°C to 125°C, the CD4049UBDT covers military and industrial extremes — avionics, satellite, downhole instrumentation, or outdoor telecom cabinets where the ambient can swing from a cold soak to engine-bay heat. The 4000B series is well-known for latch-up immunity and noise margin at high supply voltages, which is why it persists in legacy avionics and defence BOMs.
Package and handling
Supplied in a 16-SOIC (0.154" body width, 3.90 mm) — the standard small-outline footprint for this logic density. Cut Tape (CT) is also listed for prototype or low-volume builds. No exposed pad; standard SOIC reflow profile applies.