The CD4015 is a 4-stage CMOS dual static shift register consists of two identical, independent, 4-stage serial-input/parallel-output registers. Each register has independent clock and RESET inputs as well as a single serial DATA input. “Q” outputs are available from each of the four stages on both registers. All register stages are D-type, flip-flops. The logic level present at the DATA input is transferred into the first register stage and shifted over one stage at each positive-going clock transition. Resetting of all stages is accomplished by a high level on the RESET line.