thumb|300px|Schematic of a 2-to-1 multiplexer. It can be equated to a controlled switch. thumb|270px|Schematic of a 1-to-2 demultiplexer. Like a multiplexer, it can be equated to a controlled switch.
thumb|300px|Schematic of a 2-to-1 multiplexer. It can be equated to a controlled switch. thumb|270px|Schematic of a 1-to-2 demultiplexer. Like a multiplexer, it can be equated to a controlled switch.
In electronics, a multiplexer (or mux; spelled sometimes as multiplexor), also known as a data selector, is a device that selects between several analog or digital input signals and forwards the selected input to a single output line. The selection is directed by a separate set of digital inputs known as select lines. A multiplexer of 2^n inputs has n select lines, which are used to select which input line to send to the output.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).