74LS147 查看數據表（PDF） - ON Semiconductor
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74LS147 Datasheet PDF : 8 Pages
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SN74LS147 SN74LS148
SN74LS147
FUNCTION TABLE
INPUTS
OUTPUTS
1 2 3 4 5 6 7 8 9DCBA
HHHHHHHHHHHHH
XXXXXXXX L L HH L
XXXXXXX L HL HHH
XXXXXX LHHH L L L
XXXXX L HHHH L L H
XXXX LHHHHH LH L
XXX L HHHHHH LHH
XX LHHHHHHHHL L
X LHHHHHHHHHL H
LHHHHHHHHHHH L
H = HIGH Logic Level, L = LOW Logic Level, X = Irrelevant
SN74LS148
FUNCTION TABLE
INPUTS
OUTPUTS
EI 0 1 2 3 4 5 6 7 A2 A1 A0 GS EO
HXXXXXXXX H H H H H
L HHHHHHHH H H H H L
L XXXXXXXL L L L L H
L XXXXXXLH L L H L H
L XXXXX LHH L H L L H
L XXXX LHHH L H H L H
L XXX LHHHH H L L L H
L XX LHHHHH H L H L H
L X LHHHHHH H H L L H
L LHHHHHHH H H H L H
1 (11)
(12)
2
(13)
3
(1)
4
5 (2)
(3)
6
7 (4)
8 (5)
9 (10)
SN74LS147
FUNCTIONAL BLOCK DIAGRAMS
(9)
A
(7)
B
(6)
C
(14)
D
(10)
0
(11)
1
(12)
2
(13)
3
(1)
4
(2)
5
(3)
6
(4)
7
(5)
EI
SN74LS148
(15)
EO
(14)
GS
(8)
A0
(7)
A1
(6)
A2
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