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MA-990
5. IC INFORMATION
¢ The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.
Wi TC74HC154AP (FRONT BOARD ASSY : IC201)
» Line Decoder
ePin Assignment (Top View)
eTruth Table
Selected
Yo 1
24 Voc
G1 | G2|
D
Y1 2
23 A
L
L
L
1
Y2 3
22B
L
i
t
2
Y3 4
21C
L
L
L
3
¥4 5
20D
L
L
iL:
4
Y5 6
19 G2
L
L
L
5
Ye 7
18 Gi
rie ee oe
6
Y7 8
17 Y15
L
L
L
7
Y8 9
16 Y14
L
L
L
8
Y9 10
15 ¥13
L
L
H
Yio 11
14 Y12
GND 12
13 Yu
:
:
:
L
ts
H
L
L
H
L
L
H
L
L
H
L
L
H
x
H
x
H
x
X : Don't care
eBlock Diagram
G1 ©
>
=
»—p>
=>
6
yi
G2@
¢>
D
—
>D—D>
(1) Yo
|_bp,
o—@)
Y1
ES
Do——@ Y2
>o—@ Y3
A ®@
po—) v4
D>o—{®) Y5
Do—@ Y6
B @
>o—®) Y7
Dbo—©® Ya
c @
Do——49 Yo
>o—
Y10
Do
Y11
oe
Do)
Y12
>o—4) Y13
tf
p—d>—_
oo
4) Y14
t=
>—>—>o
1) Y15
18
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