74F138 Philips Semiconductors, 74F138 Datasheet - Page 3

• Manufacturer Part Number: 74F138
• Description: 1-of-8 decoder/demultiplexer
• Manufacturer: Philips Semiconductors

Philips Semiconductors
LOGIC DIAGRAM
FUNCTION TABLE
NOTES:
H = High voltage level
L = Low voltage level
X = Don’t care
APPLICATION
February 14, 1991
1-of-8 decoder/demultiplexer
A2
A1
A0
E0
E1
E2
V
GND = Pin 8
E0
A0
A1
A2
A3
A4
CC
H
X
X
L
L
L
L
L
L
L
L
= Pin 16
3
2
1
4
5
6
H
E1
X
H
X
L
L
L
L
L
L
L
L
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Q0
E2
E1
E0
E2
Q0
X
X
H
H
H
H
H
H
H
H
L
A0 A1 A2
74F138
INPUTS
15
Q1
14
A0
X
X
X
H
H
H
H
L
L
L
L
Q2
13
Q3
12
A1
X
X
X
H
H
H
H
L
L
L
L
Q4
11
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
E2
E1
E0
Figure 1. Expansion of 1-of-8 Decoding
Q5
10
A2
X
X
X
H
H
H
H
L
L
L
L
Q6
A0 A1 A2
74F138
9
SF00177
Q7
Q0
7
H
H
H
H
H
H
H
H
H
H
L
3
Q1
H
H
H
H
H
H
H
H
H
L
H
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
E2
E1
E0
Q2
H
H
H
H
H
H
H
H
H
H
L
A0 A1 A2
74F138
Q3
H
H
H
H
H
H
H
H
H
H
L
OUTPUTS
74F04
Q4
H
H
H
H
H
H
H
H
H
L
H
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Q5
E2
E1
E0
H
H
H
H
H
H
H
H
H
H
L
A0 A1 A2
Product specification
74F138
Q6
H
H
H
H
H
H
H
H
H
H
L
74F138
SF00178
Q7
Q31
H
H
H
H
H
H
H
H
H
L
H