CD4028BMS
Typical Performance Characteristics (Continued)
AMBIENT TEMPERATURE (TA) = +25oC
200
150
100
50
SUPPLY VOLTAGE (VDD) = 5V
10V
15V
0
0
20
40
60
80
100
LOAD CAPACITANCE (CL) (pF)
FIGURE 7. TYPICAL TRANSITION TIME AS A FUNCTION OF LOAD CAPACITANCE
INPUTS
1/6 CD4069B
Typical Applications
The circuit shown in Figure 8 converts any 4-bit code to a
decimal or hexadecimal code. Table 2 shows a number of
codes and the decimal or hexadecimal number in these
codes which must be applied to the input terminals of the
CD4028BMS to select a particular output. For example: in
order to get a high on output number 8 the input must be
either an 8 expressed in 4-bit Binary code, a 15 expressed in
4-Bit Gray code, or a 5 expressed in Excess-3 code.
A
B
C
D
A
B
C
D
CD4028BMS
3
CD4028BMS
0 1 2 3 4 5 6 7 8 9
0
1
1
2
2
4
5
6
7
8 9
0
3
4
5
6
7
0
1
2
3
4
5
6
7
16 OUTPUTS
FIGURE 8. CODE CONVERSION CIRCUIT
TABLE 2. CODE CONVERSION CHART
INPUT CODES
HEXA-
DECIMAL
INPUTS
DECIMAL
OUTPUT NUMBER
D
0
0
0
0
0
0
0
0
1
1
1
C
0
0
0
0
1
1
1
1
0
0
0
B
0
0
1
1
0
0
1
1
0
0
1
A
0
1
0
1
0
1
0
1
0
1
0
0
1
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
0
0
2
0
0
1
0
0
0
0
0
0
0
0
3
0
0
0
1
0
0
0
0
0
0
0
4
0
0
0
0
1
0
0
0
0
0
0
5
0
0
0
0
0
1
0
0
0
0
0
6
0
0
0
0
0
0
1
0
0
0
0
7
0
0
0
0
0
0
0
1
0
0
0
8
0
0
0
0
0
0
0
0
1
0
0
9
0
0
0
0
0
0
0
0
0
1
0
10 11 12 13 14 15
0
1
0
1
0
1
0
1
2
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
2
3
0
3
4
2
3
4
3
2
0
1
2
3
4
5
6
7
4
7
5
6
3
4
6
4
1
2
7
5
8
15
14
12
9
5
6
10
9
7-795
INTERSIL [ Intersil ]
