MC74LCX139M View Datasheet(PDF) - ON Semiconductor
Part Name
Description
Manufacturer
MC74LCX139M
ON Semiconductor
MC74LCX139M Datasheet PDF : 8 Pages
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MC74LCX139
Ea 1
A0a 2
A1a 3
Y0a 4
Y1a 5
Y2a 6
Y3a 7
GND 8
16 VCC
15 Eb
14 A0b
13 A1b
12 Y0b
11 Y1b
10 Y2b
9 Y3b
A1a 3
A0a 2
Ea 1
A1b 13
A0b 14
Eb 15
Figure 1. Pin Assignment
X/Y
1
0
2
1
EN
2
3
4 Y0a
5 Y1a
6 Y2a
7 Y3a
12 Y0b
11 Y1b
10 Y2b
9 Y3b
A1a 3
A0a 2
Ea 1
A1b 13
A0b 14
Eb 15
DMUX
0
1
G
0
3
0
1
2
3
4 Y0a
5 Y1a
6 Y2a
7 Y3a
12 Y0b
11 Y1b
10 Y2b
9 Y3b
Figure 2. IEC Logic Diagram
PIN NAMES
Pins
A0n−A1n
En
Y0n−Y3n
Function
Address Inputs
Enable Inputs
Outputs
TRUTH TABLE
Inputs
E A1 A0
H
XX
L
LL
L
LH
L
HL
L
HH
Outputs
Y0 Y1 Y2 Y3
H HH H
L HH H
H LH H
H HL H
H HH L
H = High Voltage Level;
L = Low Voltage Level;
Z = High Impedance State
ADDRESS
INPUTS
A0a 2
A1a 3
Ea 1
4 Y0a
5 Y1a
6 Y2a
7 Y3a
ACTIVE−LOW
OUTPUTS
ADDRESS A0b 14
INPUTS A1b 13
12 Y0b
11 Y1b
10 Y2b
9 Y3b
ACTIVE−LOW
OUTPUTS
Eb 15
Figure 3. Logic Diagram
En
Y0
Y1
A0
Y2
Y3
A1
Figure 4. Expanded Logic Diagram
(1/2 of Device)
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