Hitachi MB-6890 Service Manual page 24

consist
5-15 of 4 pieces
(Triple
5-16 consists 3
gf
I/O truth table is
HD74l;S08F¥'
(Quedrupfe
2-input Positive
A
AND
(svn
vc: 4A avg
45
'»3|
ml
12
II
§¢;
4
IA IB IY 2A
5-15
Fig.
AND
gate.
3-input
NAND
ve: IC
IY _Sc 38
14|
I)
12 1|
ro
I l
W' 1 S
ll IB ZA
ZS 2C
S-16
Fig.
pieces NAND
gate.
shown S-17.
fig.
as
Input
Q
c
In ut
V A p B l C
L}L
L
.LIL
H
L|H|L
\
L H H
HLIL
:HTL
H
HlH|L
HIHIH
Fin; 5-11
U
Gates)
BB BA sv
IO 9 a
U:
5 s
28 ZY GND
Gates)
IA 5v
9 3
V
I
C 7
ZY GND
Output
Y
utput
Y
H
H
H
H
H
H
H
L