Triple 3-input NOR gate from the 4000B family
The CD4025BPW is a triple 3-input NOR gate from TI's 4000B series, housed in a 14-TSSOP package. It operates from a 3V to 18V supply, making it a natural fit for mixed-voltage legacy systems — think 5V logic talking to a 12V sensor interface, or a battery-powered controller that needs to tolerate a sagging rail down to 3V. The wide supply range means you can use it as a level translator of sorts: a 3.3V microcontroller output can drive the gate, and its output swings rail-to-rail, cleaning up the logic levels for the next stage.
The 1 µA quiescent current is low enough that you can leave the gate powered in a battery-backed circuit without draining the cell. Propagation delay is 90 ns at 15V with a 50 pF load — that is about 10x slower than a 74LVC gate running at 3.3V. If you are stitching this into a high-speed bus, budget the timing accordingly; for switch debouncing, panel pushbuttons, or slow sensor polling, it is plenty fast.