Function Tables (Continued)
BCD-to-Binary Converter
BCD 9’s or BCD 10’s Complement Converter
Inputs
BCD
(See Note A)
Outputs
Inputs
Outputs
BCD
(See Note B)
(See Note C)
(See Note D)
Words
Word
²
E
D
C
B
A
G
Y5 Y4 Y3 Y2 Y1
E
D
C
B
A
G
Y8
Y7
Y6
0
1
3
5
7
9
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
0
1
2
3
4
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
H
H
L
L
L
H
L
2
4
6
8
L
L
L
L
H
H
L
H
H
L
H
H
L
H
H
H
H
L
H
L
H
L
H
L
L
L
H
10
12
14
16
18
11
13
15
17
19
L
L
L
L
L
H
H
H
H
H
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
L
L
H
H
L
H
L
5
6
7
8
9
L
L
L
L
L
L
L
H
H
H
L
L
H
H
L
H
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
L
H
L
H
H
L
L
H
L
L
H
L
H
L
H
H
H
H
H
L
L
L
H
L
L
H
20
22
24
26
28
21
23
25
27
29
H
H
H
H
H
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
L
L
H
H
L
L
H
L
0
1
2
3
4
H
H
H
H
H
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
L
H
H
L
L
L
L
L
H
H
L
H
H
H
H
H
L
L
L
H
L
L
H
L
H
L
H
H
H
H
H
L
30
32
34
36
38
31
33
35
37
39
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
L
H
L
L
L
L
H
L
L
L
L
H
L
H
L
5
6
7
8
9
H
H
H
H
H
L
L
H
H
H
L
L
H
H
L
H
L
L
L
L
L
L
L
L
L
L
L
H
H
L
L
L
H
H
H
H
H
H
L
L
H
L
L
H
L
H
H
L
H
L
H
H
H
H
L
H
L
L
H
L
Any
X
X
X
X
X
H
H
H
H
H
H
Any
X
X
X
X
X
H
H
H
H
e
e
e
Low Level, X Don’t Care
H
High Level, L
Note A: Input Conditions other than those shown produce highs at outputs Y1 through Y5.
Note B: Output Y6, Y7, and Y8 are not used for BCD-to-Binary conversion.
Note C: Input conditions other than those shown produce highs at outputs Y6, Y7, and Y8.
Note D: Outputs Y1 through Y5 are not used for BCD 9’s or BCD 10’s complement conversion.
²
When these devices are used as complement converters, input E is used as a mode control. With this input low, the BCD 9’s complement is generated; when it is
high, the BCD 10’s complement is generated.
Test Circuit
Typical Applications
TL/F/6561–6
C
L
includes probe and jig capacitance
TL/F/6561–7
FIGURE 1. BCD-to-Binary Converter
for Two BCD Decades
MSDÐMost significant decade
LSDÐLeast significant decade
Each rectangle represents a DM74184
5
NSC [ National Semiconductor ]
