MC74VHCT138A_11 Datasheet, PDF (2/7 Pages) ON Semiconductor – 3-to-8 Line Decoder

MC74VHCT138A
FUNCTION TABLE
Inputs
Outputs
E3 E2 E1 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X X H XXX HHH HHHH H
X H X XXX HHH HHHH H
L X X XXX HHH HHHH H
H L L LLL LHHHHHHH
H L L LLHH L HHHHHH
H L L LHL HH L HHHHH
H L L LHH H H H L H H H H
H L L HLL HHHH L HHH
H L L HLHHHHHH L HH
H L L HHL H H H H H H L H
H L L HHH H H H H H H H L
H = high level (steady state); L = low level (steady state);
X = don’t care
A0
SELECT
INPUTS ^A1
A2
ENABLE ^E3
INPUTS _E2
E1
LOGIC DIAGRAM
1
15 _Y0
14 _Y1
2
13 _Y2
3
12 _Y3
11 _Y4
10
Y5
9 _Y6
7
Y7
6
5
4
ACTIVE-LOW
OUTPUTS
EXPANDED LOGIC DIAGRAM
15 _Y0
A0 ¹
A1 ²
A2 ³
E2 ⁵
E1 ⁴
E3 ⁶
A0 ¹
A1 ²
A2 ³
E3 ⁶
E2 5
E1 4
BIN/OCT
1
0
2
1
4
2
3
&
4
5
EN
6
7
IEC LOGIC DIAGRAM
15 _Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9 Y6
7 Y7
A0 ¹
A1 2
A2 3
E3 6
E2 5
E1 4
DMUX
0
0
G
0
7
1
2
2
3
&
4
5
6
7
14 _Y1
13 _Y2
12 _Y3
11 _Y4
10 _Y5
9 _Y6
7 _Y7
15 _Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9 Y6
7 Y7
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