View mc74hc164 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC54/74HC164 8-Bit Serial-Input/ Parallel-Output Shift Register Do Not Use for New Designs High–Performance Silicon–Gate CMOS THIS DEVICE WILL BE SUPERCEDED BY MC54/74HC164A IN THE The MC54/74HC164 is identical in pinout to the LS164. The device inputs SECOND QUARTER OF 1996 are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The MC54/74HC164 is an 8–bit, serial–input to parallel–output shift J SUFFIX register. Two serial data inputs, A1 and A2, are provided so that one input CERAMIC PACKAGE may be used as a data enable. Data is entered on each rising edge of the 14 CASE 632–08 clock. The active–low asynchronous Reset overrides the Clock and Serial 1 Data inputs. • Output Driv