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參數(shù)資料
| 型號(hào)： | HC74HC444 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | Quad. Tridirectional Bus Transceiver(with noninverted/inverted 3-state outputs) |
| 中文描述： | 四。 Tridirectional總線收發(fā)器（帶noninverted /倒三態(tài)輸出） |
| 文件頁(yè)數(shù)： | 2/12頁(yè) |
| 文件大小： | 82K |
| 代理商： | HC74HC444 |
HD74HC442/HD74HC443HD74HC444
2
Function Table
Inputs
CS
Transfers Between Buses
S
1
X
S
0
X
G
A
G
B
G
C
HD74HC442
HD74HC443
HD74HC444
H
X
X
X
None
None
None
X
H
H
X
X
X
None
None
None
X
X
X
H
H
H
None
None
None
X
L
L
X
H
H
None
None
None
X
L
H
H
X
H
None
None
None
X
H
L
H
H
X
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
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
L
L
L
X
L
L
A
→
B, A
→
C
B
→
C, B
→
A
C
→
A, C
→
B
A
→
B
B
→
C
C
→
A
A
→
C
B
→
A
C
→
B
L
L
H
L
X
L
L
H
L
L
L
X
L
L
L
X
L
H
L
L
H
H
X
L
L
H
L
L
H
X
L
L
L
X
H
L
L
L
H
L
X
H
L
H
L
H
L
X
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