An apparatus includes first and second receiver circuits and a decision circuit. The first receiver circuit is configured to generate a first data symbol from a particular input data symbol of a plurality of input data symbols included in an input signal. The second receiver circuit is configured to generate a second data symbol from the particular input data symbol. The decision circuit is configured to select, using respective values of one or more previous output data symbols, either the first or second data symbol as a current output data symbol. In response to a change in value between successive input data symbols, the first and second receiver circuits are configured to generate the first and second data symbols with respective data valid windows with different durations.