A data recovery circuit has a phase-locked loop for generating a plurality of clock signals; an oversampling unit for non-integer times oversampling serial data, and outputting the oversampled result as sample data formed of a plurality of bits; a pattern detector for receiving the sample data, and generating a pattern signal; a state accumulator for receiving the pattern signal, accumulating the frequency of occurrence of the pattern signal, and outputting the pattern signal having the highest frequency of occurrence as a state signal; a state selector for receiving the state signal, and generating a state selection signal for selecting bits at predetermined positions in the sample data; and a data selector for receiving the sample data, selecting bits of the sample data in response to the state selection signal, and outputting the selected bits as recovered data formed of a plurality of bits.