The 74CBTLV3251 is a 1-of-8 high-speed multiplexer/demultiplexer. The select input (S0, S1, S2) controls the data flow. The multiplexer/demultiplexer switches are disabled when the output-enable (OE) input is high. The 74CBTLV3251 operates at -40 °C to +85 °C.