Aber laut der Beschreibung ist das doch kein Multiplexer oder kann mir jemand das in deutsch und verständlich übersetzten

aus dem Datenblatt:

The HCF4019B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
The HCF4019B types are comprised of fourAND/OR select gate configurations , each consisting of two 2 input AND gates driving a single 2-input OR gate. Selection is accomplished by control bits Ka and Kb In addition to selection of either channel A
or channel Bin formation , the control bits can be
applied simultaneously to accomplish the logical
A+B function.