1. A read-out device for selecting a memory cell from a plurality of memory cells and for reading out a data word stored in the memory cell, the read-out device comprising: the plurality of memory cells, in each of which a data word is stored; a plurality of inputs for feeding in input variables, on the basis of which the memory cell whose data word is read out can be selected; and a hierarchical arrangement of multiplexers having N hierarchical levels, each multiplexer having M inputs, control inputs of the multiplexers of a hierarchical level being connected to an input of the read-out device, inputs of the hierarchical arrangements of multiplexers being connected to outputs of the memory cells, the number of memory cells being less than M N .