SN74LS148D データシートの表示（PDF） - Motorola => Freescale
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SN74LS148D
Motorola => Freescale
SN74LS148D Datasheet PDF : 7 Pages
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SN54/74LS147 • SN54/74LS148 • SN54/74LS748
SN54 / 74LS147
FUNCTION TABLE
INPUTS
OUTPUTS
1 2 3 4 5 6 7 8 9 DCBA
HH HHH HHHH HH HH
XX XXX XXXL LHHL
XX X XX XX LH LHHH
XX XXX X L HHHL L L
XX XXX LHHHHL LH
XX XX L HHHHHL HL
XX X LHHHHHHL HH
XX L HHHHHHHH L L
X L HHHHHHHHH LH
L H HHH HH HH HH H L
H = HIGH Logic Level, L = LOW Logic Level, X = Irrelevant
SN54 / 74LS148
SN54 / 74LS748
FUNCTION TABLE
INPUTS
OUTPUTS
EI 0 1 2 3 4 5 6 7 A2 A1 A0 GS EO
HX XXXXXXX H H H H H
L H HHHHHHH H H H H L
L X XXXXXXL L L L L H
L X XXXXXLH L L H L H
L X XXXX LHH L H L L H
L X XXX LHHH L H H L H
L X XX LHHHH H L L L H
L X X LHHHHH H L H L H
L X LHHHHHH H H L L H
L L HHHHHHH H H H L H
FUNCTIONAL BLOCK DIAGRAMS
(11)
1
(12)
2
(13)
3
(1)
4
(2)
5
(3)
6
(4)
7
(5)
8
(10)
9
SN54 / 74LS147
(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
SN54 / 74LS148
(15)
EO
(14)
GS
(8)
A0
(7)
A1
(6)
A2
FAST AND LS TTL DATA
5-246
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