MC74VHCT139A ON Semiconductor, MC74VHCT139A Datasheet - Page 2

• Manufacturer Part Number: MC74VHCT139A
• Description: Dual 2-to-4 Decoder/ Demultiplexer
• Manufacturer: ON Semiconductor

INPUT
Figure 4. Input Equivalent Circuit
Figure 1. Pin Assignment
GND
A0a
A1a
Y1a
Y2a
Y3a
Y0a
En
A0
A1
Ea
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A0b
A1b
Y0b
Y1b
Y2b
Y3b
Eb
V
CC
Figure 3. Expanded Logic Diagram
A1a
A0a
A1b
A0b
Ea
Eb
MC74VHCT139A
http://onsemi.com
13
14
15
3
2
1
(1/2 of Device)
ADDRESS
ADDRESS
INPUTS
INPUTS
EN
1
2
2
X/Y
A1b
A0a
A1a
A0b
Figure 5. IEC Logic Diagram
Ea
Eb
0
1
2
3
Figure 2. Logic Diagram
14
13
15
2
3
1
12
11
10
4
5
6
7
9
Y0a
Y1a
Y2a
Y3a
Y0b
Y1b
Y2b
Y3b
A1a
A0a
A1b
A0b
Ea
Eb
13
14
15
3
2
1
12
11
10
4
5
6
7
9
Y0a
Y1a
Y2a
Y3a
Y0b
Y1b
Y2b
Y3b
0
1
G
DMUX
ACTIVE−LOW
ACTIVE−LOW
0
3
OUTPUTS
OUTPUTS
Y0
Y1
Y2
Y3
0
1
2
3
12
10
11
4
5
6
7
9
Y0a
Y1a
Y2a
Y3a
Y0b
Y1b
Y2b
Y3b