Six inverters, 3 V to 18 V supply — the 4000B workhorse
The Texas Instruments CD4069UBPWR is a 4000B-series CMOS hex inverter in a 14-TSSOP surface-mount package. It packs six independent inverter gates, each with a single input, and operates across a 3 V to 18 V supply range — wide enough to work directly off an unregulated battery or a 12 V industrial rail without a local regulator.
50 ns propagation delay — timing margin in slow-clock paths
At 15 V with a 50 pF load, the CD4069UBPWR delivers a 50 ns max propagation delay. That is slower than a 74HC04 running at 5 V, but the 4000B series trades speed for noise immunity and voltage flexibility. In a 32 kHz real-time clock buffer or a slow asynchronous handshake line, 50 ns is plenty of margin. The real value is that the delay stays consistent across the full 3 V to 18 V range — no surprise slowdown when the battery sags to 3.3 V.
Active lifecycle — no LTB scramble needed
The 4000B series has been a staple logic family for decades, and TI continues to manufacture it. No last-time-buy notice, no EOL clock ticking. Store the reels dry — TSSOP is MSL 1, but the narrow 0.65 mm pitch still benefits from a dry cabinet if the pouch has been open past the floor-life window.
14-TSSOP footprint — board layout notes
The 14-TSSOP package measures 0.173" body width (4.40 mm) with a 0.65 mm lead pitch. That is a standard fine-pitch SOIC footprint — no exotic land pattern. Route the supply rails with enough trace width for the 3.4 mA per-output drive; six outputs switching simultaneously stay under the package current limit. Decouple with a 0.1 µF ceramic close to pins 7 (GND) and 14 (VDD). The wide supply range means the bypass cap should be rated at least 25 V to cover the 18 V maximum.