View mc74hc165 datasheet:

MOTOROLA SEMICONDUCTOR TECHNICAL DATA 8-Bit Serial or Parallel-Input/ MC54/74HC165 Serial-Output Shift Register High–Performance Silicon–Gate CMOS J SUFFIX The MC54/74HC165 is identical in pinout to the LS165. The device inputs CERAMIC PACKAGE are compatible with standard CMOS outputs; with pullup resistors, they are 16 CASE 620–10 compatible with LSTTL outputs. 1 This device is an 8–bit shift register with complementary outputs from the last stage. Data may be loaded into the register either in parallel or in serial form. When the Serial Shift/Parallel Load input is low, the data is loaded N SUFFIX asynchronously in parallel. When the Serial Shift/Parallel Load input is high, PLASTIC PACKAGE the data is loaded serially on the rising edge of either Clock or Clock Inhibi