What the CD4069UBM is and where it fits
The Texas Instruments CD4069UBM is a 4000B-series CMOS hex inverter — six independent inverter gates in a single 14-SOIC package. It operates from a 3V to 18V supply, draws a maximum quiescent current of 1 µA, and covers the full military temperature range of -55°C to 125°C. Each output can source or sink 3.4 mA, and propagation delay is 50 ns at 15V with a 50 pF load. This part is a workhorse for general-purpose logic inversion, oscillator circuits, and level translation in designs that need wide supply tolerance and extreme temperature endurance.
3V to 18V supply — what it means for the BOM
The 3V to 18V supply range is the headline feature that separates this part from 5V-only or 3.3V-only logic families. It lets the same inverter gate work across a battery that sags from 9V to 6V, or interface a 5V microcontroller to a 12V sensor rail without a separate level shifter. The 1 µA quiescent current means it can sit on a power rail that is always on without draining the battery — a real advantage in remote or portable equipment where every microamp counts.
Temperature grade and deployment
Rated for -55°C to 125°C, the CD4069UBM is qualified for environments where commercial or even industrial parts fail: avionics avionics bays, satellite payloads, downhole drilling tools, and outdoor telecom cabinets that see both Arctic cold and solar heat soak. The 4000B series is inherently more noise-immune than 74HC at high supply voltages, which matters in electrically noisy industrial or automotive chassis environments.
Lifecycle and sourcing reality
The CD4069UBM is listed as Active and ROHS3 compliant. No LTB risk, no last-time-buy window to chase.