74hc574功能真值表及引脚管脚图
74HC574 pdf datasheet
Notes
1. H = HIGH voltage level
h = HIGH voltage level one set-up TIme prior to the LOW-to-HIGH
CP transiTIon
L = LOW voltage level
l = LOW voltage level on set-up TIme prior to the LOW-to-HIGH
CP transiTIon
Z = HIGH impedance OFF-state
= LOW-to-HIGH clock transition
