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Sony CDU31A Series Service Manual page 92

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SN74ALS139NS
-TOP VIEW-
1Y
SN74ALS641 A-1 NS
-TOP VIEW-
••
...
SN74HCOOANS
TOP VIEW-
2Y1 OUT
2Y2Cl.IT
14
13 12 1l 10
9
8
Vee
(+OV)
0
1
2
J
GND
INPUTS
OUTPUTS
EN
0
0
0
0
1
B
0
0
1
1
x
A
Y3 Y2 Y1
YO
0
1
1
1
0
1
1
1
0
1
0
1
0
, ,
1
0
,
1
1
x
1
1
1
1
0
LOW LEVEL
1
HIGH LEVEL
X
DON'T CAllE
EN
OIR OPERATION
0
0
Bto A
o
1
Atos
X
HI· Z
O; LOW LEVEL
1 ;
HIGH LEVEL
X:
OON'T CARE •
H1-z; HIGH l"'PEOANCE
Dositive Logic: Y=
AB
7-15
SN74HC14ANS (TEXAS INSTRUMENTS)
-TOP VIEW-
6 A 6 Y 5 A S Y 4 A 4 Y
SN74LS244NS
TOP VIEW
TC7S08F (TOSHIBA)
-TOP VIEW-
SN74HC 14ANS
0;
LOW LEVEL
1 ;HIGH LEVEL
O:LOW LEVEL
1; HIGH LEVEL
X; OON'T CARE
Hl•Z;HIGH IMPEDANCE

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