Datasheet MC14028BD, MC14028BCL, MC14028BCP Datasheet (Motorola)

MOTOROLA CMOS LOGIC DATA

113

MC14028B

 
 

The MC14028B decoder is constructed so that an 8421 BCD code on the
four inputs provides a decimal (one–of–ten) decoded output, while a 3–bit
binary input provides a decoded octal (one–of–eight) code output with D
forced to a logic “0”. Expanded decoding such as binary–to–hexadecimal
(one–of–16), etc., can be achieved by using other MC14028B devices. The
part is useful for code conversion, address decoding, memory selection
control, demultiplexing, or readout decoding.

• Diode Protection on All Inputs

• Supply Voltage Range = 3.0 Vdc to 18 Vdc

• Capable of Driving Two Low–power TTL Loads or One Low–power

Schottky TTL Load Over the Rated Temperature Range

• Positive Logic Design

• Low Outputs on All Illegal Input Combinations

• Similar to CD4028B.

MAXIMUM RATINGS* (Voltages Referenced to V

SS

)

Symbol

Parameter

Value

Unit

V

DD

DC Supply Voltage

– 0.5 to + 18.0

V

Vin, V

out

Input or Output Voltage (DC or Transient)

– 0.5 to VDD + 0.5

V

lin, l

out

Input or Output Current (DC or Transient),
per Pin

± 10

mA

P

D

Power Dissipation, per Package†

500

mW

T

stg

Storage Temperature

– 65 to + 150

_

C

T

L

Lead Temperature (8–Second Soldering)

260

_

C

*Maximum Ratings are those values beyond which damage to the device may occur.
†Temperature Derating:

Plastic “P and D/DW” Packages: – 7.0 mW/_C From 65_C To 125_C
Ceramic “L” Packages: – 12 mW/_C From 100_C To 125_C

BLOCK DIAGRAM

8421

BCD

INPUTS

DECIMAL
DECODED
OUTPUTS

OCTAL
DECODED
OUTPUTS

3
14
2
15
1
6
7
4
9
5

A

B

C

D Q9

Q8

Q7

Q6

Q5

Q4

Q3

Q2

Q1

Q0

3–BIT
BINARY
INPUTS

10

13

12

11

VDD = PIN 16

VSS = PIN 8

TRUTH TABLE

D C B A Q9 Q8 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0

0 0 0 0 0 0 0 0 0 0 0 0 0 1
0 0 0 1 0 0 0 0 0 0 0 0 1 0
0 0 1 0 0 0 0 0 0 0 0 1 0 0
0 0 1 1 0 0 0 0 0 0 1 0 0 0

0 1 0 0 0 0 0 0 0 1 0 0 0 0
0 1 0 1 0 0 0 0 1 0 0 0 0 0
0 1 1 0 0 0 0 1 0 0 0 0 0 0
0 1 1 1 0 0 1 0 0 0 0 0 0 0

1 0 0 0 0 1 0 0 0 0 0 0 0 0
1 0 0 1 1 0 0 0 0 0 0 0 0 0
1 0 1 0 0 0 0 0 0 0 0 0 0 0
1 0 1 1 0 0 0 0 0 0 0 0 0 0

1 1 0 0 0 0 0 0 0 0 0 0 0 0
1 1 0 1 0 0 0 0 0 0 0 0 0 0
1 1 1 0 0 0 0 0 0 0 0 0 0 0
1 1 1 1 0 0 0 0 0 0 0 0 0 0



SEMICONDUCTOR TECHNICAL DATA

 Motorola, Inc. 1995

REV 3
1/94



L SUFFIX

CERAMIC
CASE 620

ORDERING INFORMATION

MC14XXXBCP Plastic
MC14XXXBCL Ceramic
MC14XXXBD SOIC

TA = – 55° to 125°C for all packages.

P SUFFIX

PLASTIC

CASE 648

D SUFFIX

SOIC

CASE 751B

MOTOROLA CMOS LOGIC DATAMC14028B

114

ELECTRICAL CHARACTERISTICS (Voltages Referenced to V

SS

)

V

– 55_C

25_C

125_C

Characteristic

Symbol

V

DD

Vdc

Min

Max

Min

Typ #

Max

Min

ÎÎÎ

ÎÎÎ

ÎÎÎ

Max

Unit

“0” Level

Vin = VDD or 0

V

OL

5.0
10
15

—
—
—

0.05

0.05

0.05

—
—
—

0
0
0

0.05

0.05

0.05

—
—
—

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

0.05

0.05

0.05

Vdc

“1” Level

Vin = 0 or V

DD

V

OH

5.0
10
15

4.95

9.95

14.95

—
—
—

4.95

9.95

14.95

5.0
10
15

—
—
—

4.95

9.95

14.95

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

—
—
—

Vdc

“0” Level
(VO = 4.5 or 0.5 Vdc)
(VO = 9.0 or 1.0 Vdc)
(VO = 13.5 or 1.5 Vdc)

V

IL

5.0
10
15

—
—
—

1.5

3.0

4.0

—
—
—

2.25

4.50

6.75

1.5

3.0

4.0

—
—
—

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

1.5

3.0

4.0

Vdc

“1” Level
(VO = 0.5 or 4.5 Vdc)
(VO = 1.0 or 9.0 Vdc)
(VO = 1.5 or 13.5 Vdc)

V

IH

5.0
10
15

3.5

7.0
11

—
—
—

3.5

7.0
11

2.75

5.50

8.25

—
—
—

3.5

7.0
11

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

—
—
—

Vdc

I

OH

5.0

5.0
10
15

– 3.0

– 0.64

– 1.6
– 4.2

—
—
—
—

– 2.4

– 0.51

– 1.3
– 3.4

– 4.2
– 0.88
– 2.25

– 8.8

—
—
—
—

– 1.7

– 0.36

– 0.9
– 2.4

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

—
—
—
—

mAdc

I

OL

5.0
10
15

0.64

1.6

4.2

—
—
—

0.51

1.3

3.4

0.88

2.25

8.8

—
—
—

0.36

0.9

2.4

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

—
—
—

mAdc

Input Current

I

in

15

—

± 0.1

—

±0.00001

± 0.1

—

ÎÎÎ

ÎÎÎ

ÎÎÎ

± 1.0

µAdc

Input Capacitance

(Vin = 0)

C

in

—

—

—

—

5.0

7.5

—

ÎÎÎ

ÎÎÎ

ÎÎÎ

—

pF

Quiescent Current

(Per Package)

I

DD

5.0
10
15

—
—
—

5.0
10
20

—
—
—

0.005

0.010

0.015

5.0
10
20

—
—
—

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

ÎÎÎ

150
300
600

µAdc

Total Supply Current**†

(Dynamic plus Quiescent,
Per Package)
(CL = 50 pF on all outputs, all
buffers switching)

I

T

5.0
10
15

IT = (0.3 µA/kHz) f + I

DD

IT = (0.6 µA/kHz) f + I

DD

IT = (0.9 µA/kHz) f + I

DD

µAdc

#Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.
**The formulas given are for the typical characteristics only at 25_C.
†To calculate total supply current at loads other than 50 pF:

IT(CL) = IT(50 pF) + (CL – 50) Vfk

where: IT is in µA (per package), CL in pF, V = (VDD – VSS) in volts, f in kHz is input frequency, and k = 0.001.

This device contains protection circuitry to guard against damage
due to high static voltages or electric fields. However, precautions must
be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, Vin and
V

out

should be constrained to the range VSS ≤ (Vin or V

out

) ≤ VDD.

Unused inputs must always be tied to an appropriate logic voltage
level (e.g., either VSS or VDD). Unused outputs must be left open.

PIN ASSIGNMENT

13

14

15

16

9

10

11

125

4

3

2

1

8

7

6

C

B

Q1

Q3

V

DD

Q8

A

D

Q7

Q0

Q2

Q4

V

SS

Q6

Q5

Q9

Output Voltage

Input Voltage

Output Drive Current

(VOH = 2.5 Vdc) Source
(VOH = 4.6 Vdc)
(VOH = 9.5 Vdc)
(VOH = 13.5 Vdc)

(VOL = 0.4 Vdc) Sink
(VOL = 0.5 Vdc)
(VOL = 1.5 Vdc)

MOTOROLA CMOS LOGIC DATA

115

MC14028B

SWITCHING CHARACTERISTICS* (C

L

= 50 pF, TA = 25_C)

Characteristic

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

Symbol

V

DD

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

Min

Typ #

Max

Unit

Output Rise and Fall Time

t

TLH

, t

THL

= (1.5 ns/pF) CL + 25 ns

t

TLH

, t

THL

= (0.75 ns/pF) CL + 12.5 ns

t

TLH

, t

THL

= (0.55 ns/pF) CL + 9.5 ns

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

t

TLH

,

t

THL

5.0
10
15

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

—
—
—

100

50
40

200
100

80

ns

Propagation Delay Time

t

PLH

, t

PHL

= (1.7 ns/pF) CL + 215 ns

t

PLH

, t

PHL

= (0.66 ns/pF) CL + 97 ns

t

PLH

, t

PHL

= (0.5 ns/pF) CL + 65 ns

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

t

PLH

,

t

PHL

5.0
10
15

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

ÎÎÎÎ

—
—
—

300
130

90

600
260
180

ns

*The formulas given are for the typical characteristics only at 25_C.
#Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

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 CL 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%

MOTOROLA CMOS LOGIC DATAMC14028B

116

LOGIC DIAGRAM

Q9

Q8

Q7

Q6

Q5

Q4

Q3

Q2

Q1

Q0

D

C

B

A

APPLICATIONS INFORMATION

Expanded decoding can b e 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 M C14028B 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

C B A

D C B A D C B A

MC14028B

Q9 Q0 Q9 Q0

15 –8 15 – 0

OUTPUT NUMBERS

Code and Redefined

Output Numbers

Hexadecimal Decimal

Inputs

Output Numbers

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

4–Bit

Binary

4–Bit

Gray

Excess–3

Excess–3

Gray

Aiken

4221

MOTOROLA CMOS LOGIC DATA

117

MC14028B

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

A B C D

MC14028B

Q0 Q9

A B C D

MC14028B

Q0 Q9

A B C D

MC14028B

Q0 Q9

A B C D

MC14028B

Q0 Q9

A B C D

MC14028B

Q0 Q9

A B C D

MC14028B

Q0 Q9

A B C D

MC14028B

Q0 Q9

A B C D

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

29 1 0

APPROPRIATE

VOLTAGE

NEON
DISPLAY

APPROPRIATE

VOLTAGE

INCANDESCENT
DISPLAY

OR

MOTOROLA CMOS LOGIC DATAMC14028B

118

OUTLINE DIMENSIONS

P SUFFIX

PLASTIC DIP PACKAGE

CASE 648–08

ISSUE R

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.

4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.

5. ROUNDED CORNERS OPTIONAL.

–A–

B

F

C

S

H

G

D

J

L

M

16 PL

SEATING

1 8

916

K

PLANE

–T–

M

A

M

0.25 (0.010) T

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.740 0.770 18.80 19.55
B 0.250 0.270 6.35 6.85
C 0.145 0.175 3.69 4.44
D 0.015 0.021 0.39 0.53

F 0.040 0.70 1.02 1.77
G 0.100 BSC 2.54 BSC
H 0.050 BSC 1.27 BSC

J 0.008 0.015 0.21 0.38
K 0.110 0.130 2.80 3.30

L 0.295 0.305 7.50 7.74
M 0 10 0 10
S 0.020 0.040 0.51 1.01

____

L SUFFIX

CERAMIC DIP PACKAGE

CASE 620–10

ISSUE V

NOTES:

1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: INCH.

3. DIMENSION L TO CENTER OF LEAD WHEN
FORMED PARALLEL.

4. DIMENSION F MAY NARROW TO 0.76 (0.030)
WHERE THE LEAD ENTERS THE CERAMIC
BODY.

–A–

–B–

–T–

F

E

G

N

K

C

SEATING
PLANE

16 PLD

S

A

M

0.25 (0.010) T

16 PLJ

S

B

M

0.25 (0.010) T

M

L

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A 0.750 0.785 19.05 19.93
B 0.240 0.295 6.10 7.49
C ––– 0.200 ––– 5.08
D 0.015 0.020 0.39 0.50
E 0.050 BSC 1.27 BSC
F 0.055 0.065 1.40 1.65
G 0.100 BSC 2.54 BSC
H 0.008 0.015 0.21 0.38
K 0.125 0.170 3.18 4.31
L 0.300 BSC 7.62 BSC
M 0 15 0 15
N 0.020 0.040 0.51 1.01

_ _ _ _

16 9

1 8

MOTOROLA CMOS LOGIC DATA

119

MC14028B

OUTLINE DIMENSIONS

D SUFFIX

PLASTIC SOIC PACKAGE

CASE 751B–05

ISSUE J

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.

1 8

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

_ _ _ _

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MC14028B/D

*MC14028B/D*

◊