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Hitachi MB-6890 Service Manual page 31

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(Dual
4-Line
to
Selectors/Multiplexers)
I
Slrcbc
(SV)
Select
VCC
2G
A
'Id
as
I5
I
I
ll!!
.
-
B
I
1
IG
Sdeci
IC:
Sfmbt
B
-5-
'IT'1I>Ig_
Input
Select
" " 2 = " " §
X
X
X
L
L
L
_
_
L
L
I
H
L
H
L
L
H
H
H
L
I..
I
I
H
L
HI
p
I
H
H
L
I
H
H
H
pp
X :'H"
Acceptable
eae
we
1/o
Truth
D
,Q
Input
Salocf
Dqrq
I
I
aAcoIcIIc2
I
I
X
x
x
x
I
I
L
L
x
L
L
I
L
H
x
x I L I x I x L , _
ILIH
I
I
I
.
.,
L.
._
"
"
"'
I
,"
I
I
H
WL
x
x
I
H
L
x
x
p
I
H
H
x
x
HI
H
x
x
I
"
Acceptable
""
both
and
H
In
ut
I
G
A
I
H
x
I
I
'~
'~
I
L
L
I-
I
H
I
I
L
n
Co
-=>--Po
Cx
cz-_-_.ee
Cx
,
when
A
=
B
connect
='L',
'I
='L'-
When
B
='H}
connect
When
A='H'.B='L,
connect
when
"=B='H}
connect
I-Line
Data
Input
can
Cgyjgput
2Co
2CJ
2Cx
2C|
H
I2
II
|o
9
;"|
..|
4
5
s
1
a
»
GND
IC:
ICI
lCo
IY
\
Input
Output
om
33
:5-8
I
Output
'
Strobe
Y
' T =
S
H
L
L
ng
ng
I
I
L
I
'
L
D,
D,
I
L
I
D,
D,
L
U,
D,
'
L
D,
D,
I
L
D,
D,
L
D,
D.
I
I
I
'
L
D,
D,
a n d " * L "
both
"H"
Table
(HD74Ls153P>
Out
I
I
gym"
I
cs\
cs
Y
I
xx
x
H
I
L
x
x
L
L
I
I
x
x
L
H
I
I
I
I
_.
,
__
X
I
I
I-
I*
I
I
L
x
L
L
I
Dx I
I
H
L
H
A
I
I
x
L
L
L
I
"
I
xIYH
L
H
L g
OR
I
output
I
I
a
Y
I
x
L
'-
I
Value
I
I
H
Value
L
Value
I
Value
H
OR
by
other
expression
Sw'
I,
_
'
'
Swz
~L
d
Yi
L
means
_,_
a
5
I1
b
SW2
G='L',
connect
C
P
_H_
d
SW2
*=
connect
5-33
plexers.
Multiplexer
function
out
(Table
W
H
I
I
;I
,
of
Co
of
Cf
of
C2
of
3
to
X
to
Y
UI'
consists
2
pair
is
the
device
switch
rotary
as
D-L-..
outpuii
ll-UNI
necessary
5-9).
JDO
of
Multi-
which
has
similar
which_take_s
a n - I
.--»-.U
»
|\|¢|ly
.|.l||J\-I
MD

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