NLV14028BDR2G

MC14028B
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4
Figure 1. Dynamic Signal Waveforms
Inputs B, C, and D switching
in respect to a BCD code.
Inputs A, B, and D low.
All outputs connected to respective
C
L
loads. f in respect to a system clock
.
20 ns 20 ns
90%
50%
10%
1/f
V
DD
V
SS
20 ns 20 ns
INPUT A
INPUT C
Q4
10%
90%
50%
V
DD
V
SS
V
OH
V
OL
t
PLH
t
PHL
t
TLH
t
THL
50%
90%
10%
LOGIC DIAGRAM
Q9
Q8
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
D
C
B
A
APPLICATIONS INFORMATION
Expanded decoding can be performed by using the
MC14028B and other CMOS Integrated Circuits. The
circuit in Figure 2 converts any 4−bit code to a decimal or
hexadecimal code. The accompanying table shows the input
binary combinations, the associated “output numbers” that
go “high” when selected, and the “redefined output
numbers” needed for the proper code. For example: For the
combination DCBA = 0111 the output number 7 is redefined
for the 4−bit binary, 4−bit gray, excess−3, or excess−3 gray
codes as 7, 5, 4, or 2, respectively. Figure 3 shows a 6−bit
binary 1−of−64 decoder using nine MC14028B circuits and
two MC14069UB inverters.
The MC14028B can be used in decimal digit displays,
such as, neon readouts or incandescent projection indicators
as shown in Figure 4.
Figure 2. Code Conversion Circuit and Truth Table
INPUTS
D
MC14028B
CBA
DCB A DCB A
MC14028B
Q9 Q0 Q9 Q0
15 -8 15 -0
OUTPUT NUMBERS
MC14028B
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5
Inputs
Output Numbers
Code and Redefined
Output Numbers
Hexadecimal Decimal
D C B A 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 2 3 0 2 2
0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 3 2 0 3 3
0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 4 7 1 4 4
0 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 5 6 2 3
0 1 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 6 4 3 1 4
0 1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 7 5 4 2
1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 8 15 5
1 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 9 14 6 5
1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 10 12 7 9 6
1 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 11 13 8 5
1 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 12 8 9 5 6
1 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 13 9 6 7 7
1 1 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 11 8 8 8
1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 10 7 9 9
Figure 3. Six−Bit Binary 1−of−64 Decoder
INPUTS
A B C D E F INHIBIT
(NO SELECTION)
A B C -D
Q0 Q9
MC14028B
ABCD
MC14028B
Q0 Q9
ABCD
MC14028B
Q0 Q9
ABCD
MC14028B
Q0 Q9
ABCD
MC14028B
Q0 Q9
ABCD
MC14028B
Q0 Q9
ABCD
MC14028B
Q0 Q9
ABCD
MC14028B
Q0 Q9
ABCD
MC14028B
Q0 Q9
70 8 15 16 23 24 31 32 39 40 47 48 55 56 63
*1/6 MC14069UB 64 OUTPUTS (SELECTED OUTPUT IS HIGH)
Figure 4. Decimal Digit Display Application
A
Q9
MC14028B
B
C
D
Q8
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
9
0
2910
APPROPRIATE
VOLTAGE
NEON
DISPLAY
APPROPRIATE
VOLTAGE
INCANDESCENT
DISPLAY
OR
4−Bit
Binary
4−Bit
Gray
Excess−3
Excess−3
Gray
Aiken
4221
MC14028B
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6
PACKAGE DIMENSIONS
SOIC−16
D SUFFIX
CASE 751B−05
ISSUE K
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR PROTRUSION
SHALL BE 0.127 (0.005) TOTAL IN EXCESS OF THE D
DIMENSION AT MAXIMUM MATERIAL CONDITION.
18
16 9
SEATING
PLANE
F
J
M
R
X 45
_
G
8 PLP
−B−
−A−
M
0.25 (0.010) B
S
−T−
D
K
C
16 PL
S
B
M
0.25 (0.010) A
S
T
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A 9.80 10.00 0.386 0.393
B 3.80 4.00 0.150 0.157
C 1.35 1.75 0.054 0.068
D 0.35 0.49 0.014 0.019
F 0.40 1.25 0.016 0.049
G 1.27 BSC 0.050 BSC
J 0.19 0.25 0.008 0.009
K 0.10 0.25 0.004 0.009
M 0 7 0 7
P 5.80 6.20 0.229 0.244
R 0.25 0.50 0.010 0.019
____
6.40
16X
0.58
16X
1.12
1.27
DIMENSIONS: MILLIMETERS
1
PITCH
SOLDERING FOOTPRINT*
16
89
8X
*For additional information on our Pb−Free strategy and soldering
details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.
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or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets
and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each
customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended,
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P
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Phone: 81−3−5817−1050
MC14028B/D
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NLV14028BDR2G

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Encoders, Decoders, Multiplexers & Demultiplexers BCD-TO-DECIMAL DECODER
Lifecycle:
New from this manufacturer.
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