The 100341 contains eight edge-triggered, D-type flip-flops with individual inputs (Pn) and outputs (Qn) for parallel operation, and with serial inputs (Dn) and steering logic for bidirectional shifting. The flip-flops accept input data a setup time before the positive-going transition of the clock pulse and their outputs respond a propagation delay after this rising clock edge. The circuit operating mode is determined by the Select inputs S0 and S1, which are internally decoded to select either "parallel entry", "hold", "shift left" or "shift right" as described in the Truth Table. All inputs have 50 k pull-down resistors.