HD74HC444 查看數據表（PDF） - Hitachi -> Renesas Electronics
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HD74HC444 Datasheet PDF : 12 Pages
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HD74HC442/HD74HC443HD74HC444
Function Table
Inputs
Transfers Between Buses
CS S1 S0 GA GB GC HD74HC442
H
X
X
X
X
X
None
HD74HC443
None
X
H
HXX
X None
None
X
X
XHH
H None
None
X
L
L
XH
H None
None
X
L
HHX
H None
None
X
H
L
HH
X None
None
L
L
L XL
L
A → B, A → C
A → B, A → C
L
L
H
L
X
L
B → C, B → A
B → C, B → A
L
HLLL
X C → A, C → B
C → A, C → B
L
L
L XL
H A→B
A→B
L
L
H
HX
L
B→C
B→C
L
H
L
L
H
X
C→A
C→A
L
L
L
X
H
L
A→C
A→C
L
L
H
L
X
H
B→A
B→A
L
H L HL
X C→B
C→B
HD74HC444
None
None
None
None
None
None
A → B, A → C
B → C, B → A
C → A, C → B
A→B
B→C
C→A
A→C
B→A
C→B
2
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