An integrated semiconductor memory includes a memory cell array having memory cells for storing a datum having a first and a second data value. An input datum present at a data terminal is stored multiply in the memory cells of the memory cell array. In order to read out the input datum, the multiply stored input data are fed to an evaluation circuit. The evaluation circuit generates, on the output side, an output datum having the data value that was stored more frequently in the memory cells used for multiple storage of the input datum than other data values. The integrated semiconductor memory thus makes it possible to reduce transfer errors when reading data into the memory cell array or reading data out of the memory cell array.