74hc574作用真值表及脚位引脚图

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

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