Dual 4-Line To 1-Line Data Selectors/Multiplexers With 3-State Outputs

Each of these data selectors/multiplexers SN74HC253 contains inverters and drivers to supply full binary decoding data selection to the AND-OR Gates Separate output-control inputs are provided for each of the two 4-line sections.
The 3-state outputs CAN Interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (in the high-impedance state), the low impedance of the single enabled output drives the bus line to a high or low Logic level. Each output has its own output-enable (OE) input. The outputs are disabled when their respective OE is high.
By Texas Instruments