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Hitachi MB-6890 Service Manual page 25

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QF
5-18
consist
3
pieces
I/O
truth
table
is
as
5-20
consists
of
5
pieces
The
diffgpengg
from
H-#L
and
L-#H
(Inverter
goes
H'5?14¢$;l¥F§,.
(Triple
3
-input
Positive
AND
Gates)
Vcc
IC
IY
3C
38
Ed
I
'
gal II?
'I
2
~1
5
IA
IB
ZA
za
2C
Fig.
5-18
of
3
input
AND
below
in
Fiq-
shown
Input
____
A
B
C
lnput
Output
_
I
A
a
c
I
I
I
L
L
L
L
L
H
L
H
L
I
I
L
H
H
I
H
L
L
g
I
H
L
H
I
H
H
l.
I
H
H
H
(Hex
Schnutt-TjiggerInverters)
ISI)
Vcc
SA
SY
SA
5v
,I
,
I
Ii
I
I
I
I
'l
If
ZA
ZY
BA
Fig.
5-20
of
inverters.
regular
inverter
for
the
input
V;/A
3Y
Lil
»
Is['Ir
2Y
GND
Gate.
5-19-
Output
Y
Y
L
L
I
L
L
L
L
L
H
4,5
,gy
I
I
I
Sv
Quo
is
the
voltage
Input
which
has
noise).
when
output

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