The 74HC164 ; 74HCT164 is a 8-bit serial-in/parallel-out shift register. The Gadget Contains two serial data inputs (DSA and DSB), eight concurrent data outputs (Q0 to Q7). Information is entered serially via DSA or DSB and input may be Utilized as an active HIGH allow for data entry via another input signal. Data is changed on the LOW-to-HIGH Drives and Enroll all outputs independently of different inputs. Inputs include clamp diodes. This enables the usage of current limiting resistors to port inputs to voltages in Surplus of VCC.