MC14028B_06_技术文档

MC14028B

BCD−To−Decimal Decoder

Binary−To−Octal Decoder

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−sixteen), 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.

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MARKING

DIAGRAMS

16

Features

PDIP−16

MC14028BCP

AWLYYWWG

P SUFFIX

CASE 648

• Diode Protection on All Inputs

• Supply Voltage Range = 3.0 Vdc to 18 Vdc

1

• Capable of Driving Two Low−power TTL Loads or One Low−Power

Schottky TTL Load Over the Rated Temperature Range

• Positive Logic Design

16

SOIC−16

D SUFFIX

CASE 751B

14028BG

AWLYWW

• Low Outputs on All Illegal Input Combinations

• Similar to CD4028B

1

• Pb−Free Packages are Available*

16

SOEIAJ−16

MAXIMUM RATINGS (Voltages Referenced to V

)

MC14028B

ALYWG

SS

F SUFFIX

CASE 966

1

Parameter

Symbol

Value

Unit

V

1

DC Supply Voltage Range

V

DD

−0.5 to +18.0

Input or Output Voltage Range

(DC or Transient)

V , V

−0.5 to V

+ 0.5

V

in out

DD

A

= Assembly Location

WL, L = Wafer Lot

YY, Y = Year

WW, W = Work Week

Input or Output Current (DC or Transient)

per Pin

I , I

in out

10

mA

G

= Pb−Free Package

Power Dissipation per Package (Note 1)

Ambient Temperature Range

P

500

mW

°C

D

T

A

−55 to +125

−65 to +150

260

Storage Temperature Range

T

stg

°C

ORDERING INFORMATION

Lead Temperature (8−Second Soldering)

T

°C

L

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

Stresses exceeding Maximum Ratings may damage the device. Maximum

Ratings are stress ratings only. Functional operation above the Recommended

Operating Conditions is not implied. Extended exposure to stresses above the

Recommended Operating Conditions may affect device reliability.

1. Temperature Derating: Plastic “P and D/DW”

Packages: – 7.0 mW/_C From 65_C To 125_C

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, V and V should be constrained

in

out

to the range V v (V or V ) v V

.

SS

in

out

DD

Unused inputs must always be tied to an appropriate logic voltage level

(e.g., either V or V ). Unused outputs must be left open.

SS

DD

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

1

Publication Order Number:

June, 2006 − Rev. 6

MC14028B/D

MC14028B

PIN ASSIGNMENT

BLOCK DIAGRAM

Q4

Q2

Q0

Q7

Q9

Q5

Q6

1

2

3

4

5

6

7

8

16

V

DD

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

Q8

Q9

3

10

A

B

C

D

14

2

15 Q3

14 Q1

3−BIT

OCTAL

BINARY

13

INPUTS

15

1

8421

BCD

DECODED

OUTPUTS

13

12

11

10

9

B

DECIMAL

DECODED

OUTPUTS

6

C

INPUTS

12

7

D

4

A

9

11

5

V

SS

Q8

V

= PIN 16

= PIN 8

DD

SS

TRUTH TABLE

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

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

ORDERING INFORMATION

†

Device

MC14028BCP

Package

Shipping

PDIP−16

25 Units / Rail

48 Units / Rail

MC14028BCPG

PDIP−16

(Pb−Free)

MC14028BD

SOIC−16

MC14028BDG

SOIC−16

(Pb−Free)

MC14028BDR2

SOIC−16

2500 / Tape & Reel

50 Units / Rail

MC14028BDR2G

SOIC−16

(Pb−Free)

MC14028BF

SOEIAJ−16

MC14028BFEL

MC14028BFELG

2000 / Tape & Reel

SOEIAJ−16

(Pb−Free)

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

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2

MC14028B

ELECTRICAL CHARACTERISTICS (Voltages Referenced to V

)

SS

− 55_C

25_C

125_C

V

DD

Typ

(Note 2)

Min

Max

Min

Max

Min

Max

Vdc

Characteristic

Output Voltage

Symbol

Unit

“0” Level

“1” Level

5.0

10

15

−

0.05

−

0

0.05

−

0.05

Vdc

V

in

= V or 0

V

OL

DD

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

−

Vdc

V

in

= 0 or V

DD

V

OH

Input Voltage

(V = 4.5 or 0.5 Vdc)

“0” Level

“1” Level

5.0

10

15

−

1.5

3.0

4.0

−

2.25

4.50

6.75

1.5

3.0

4.0

−

1.5

3.0

4.0

O

V

IL

(V = 9.0 or 1.0 Vdc)

O

(V = 13.5 or 1.5 Vdc)

O

Vdc

(V = 0.5 or 4.5 Vdc)

O

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

−

V

IH

(V = 1.0 or 9.0 Vdc)

O

(V = 1.5 or 13.5 Vdc)

O

Output Drive Current

mAdc

(V = 2.5 Vdc)

Source

Sink

5.0

10

– 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

−

OH

(V = 4.6 Vdc)

I

OH

(V = 9.5 Vdc)

OH

(V = 13.5 Vdc)

OH

15

(V = 0.4 Vdc)

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

−

mAdc

(V = 0.5 Vdc)

OL

I

OL

(V = 1.5 Vdc)

OL

Input Current

I

15

−

0.1

−

0.00001

5.0

0.1

7.5

−

1.0

−

mAdc

pF

in

Input Capacitance (V = 0)

C

in

Quiescent Current (Per Package)

I

5.0

10

15

−

5.0

10

20

−

0.005

0.010

0.015

5.0

10

20

−

150

300

600

mAdc

DD

Total Supply Current (Note 3, 4)

(Dynamic plus Quiescent,

Per Package)

I

T

5.0

10

15

I = (0.3 mA/kHz) f + I

mAdc

T

DD

I = (0.6 mA/kHz) f + I

T

I = (0.9 mA/kHz) f + I

T

(C = 50 pF on all outputs, all

L

buffers switching)

2. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

3. The formulas given are for the typical characteristics only at 25_C.

4. To calculate total supply current at loads other than 50 pF: I (C ) = I (50 pF) + (C – 50) Vfk where: I is in mA (per package), C in pF,

T

L

T

L

T

L

V = (V – V ) in volts, f in kHz is input frequency, and k = 0.001.

DD

SS

SWITCHING CHARACTERISTICS (Note 5) (C = 50 pF, T = 25_C)

L

A

Typ

(Note 6)

Characteristic

Output Rise and Fall Time

Symbol

V

DD

Min

Max

Unit

t

,

ns

TLH

t

, t

= (1.5 ns/pF) C + 25 ns

t

5.0

10

15

−

100

50

40

200

100

80

TLH THL

L

THL

, t

= (0.75 ns/pF) C + 12.5 ns

TLH THL

L

, t

= (0.55 ns/pF) C + 9.5 ns

TLH THL

L

Propagation Delay Time

t

,

ns

PLH

t

, t

= (1.7 ns/pF) C + 215 ns

= (0.66 ns/pF) C + 97 ns

= (0.5 ns/pF) C + 65 ns

L

5.0

10

15

−

300

130

90

600

260

180

PLH PHL

L

PHL

, t

PLH PHL

L

, t

PLH PHL

5. The formulas given are for the typical characteristics only at 25_C.

6. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

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3

MC14028B

20 ns

INPUT A

20 ns

V

DD

90%

Inputs B, C, and D switching

in respect to a BCD code.

All outputs connected to respective

C loads. f in respect to a system clock.

L

50%

10%

SS

1/f

20 ns

90%

20 ns

V

DD

INPUT C

50%

10%

SS

Inputs A, B, and D low.

t

PHL

PLH

V

OH

90%

50%

t

Q4

10%

OL

t

TLH

THL

Figure 1. Dynamic Signal Waveforms

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

Q8

Q9

A

B

C

D

LOGIC DIAGRAM

INPUTS

APPLICATIONS INFORMATION

D

C

B

A

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.

D

C

B

A

C

B

MC14028B

Q9

Q0

Q9

Q0

15

−ꢀ8

15

−ꢀ0

OUTPUT NUMBERS

Figure 2. Code Conversion Circuit and Truth Table

The MC14028B can be used in decimal digit displays,

such as, neon readouts or incandescent projection indicators

as shown in Figure 4.

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4

MC14028B

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

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

2

3

0

1

3

2

0

1

2

3

0

1

2

0

3

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

4

5

6

7

6

4

5

1

2

3

4

3

4

1

2

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

8

9

15

14

5

6

7

8

5

6

10 12

11 13

9

5

1

0

1

0

1

0

1

0

1

0

1

0

1

0

1

0

12

13

14 11

15 10

8

9

5

6

8

7

6

7

8

9

7

8

9

INPUTS

A

B

C

D

E

B

F

INHIBIT

−ꢀD

(NO SELECTION)

A

C

MC14028B

Q0

Q9

A

B

MC14028B

C

D

A

B

MC14028B

C

D

A

B

C

MC14028B

D

A

B

C

MC14028B

D

A

B

C

MC14028B

D

A

B

MC14028B

C

D

A

B

C

MC14028B

D

A B C D

MC14028B

Q9

Q0

0

Q9 Q0 Q9 Q0

Q9 Q0

7

8

15

16

23

24

31

32

39

40

47

48

55

56

63

*1/6 MC14069UB

64 OUTPUTS (SELECTED OUTPUT IS HIGH)

Figure 3. Six−Bit Binary 1−of−64 Decoder

APPROPRIATE

VOLTAGE

APPROPRIATE

VOLTAGE

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

Q8

Q9

A

B

C

D

NEON

INCANDESCENT

DISPLAY

OR

MC14028B

0

9

2

1

0

Figure 4. Decimal Digit Display Application

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5

MC14028B

PACKAGE DIMENSIONS

PDIP−16

CASE 648−08

ISSUE T

NOTES:

−A−

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.

16

1

9

8

B

S

5. ROUNDED CORNERS OPTIONAL.

INCHES

DIM MIN MAX

0.740 0.770 18.80 19.55

MILLIMETERS

F

C

L

MIN MAX

A

B

C

D

F

0.250 0.270

0.145 0.175

0.015 0.021

6.35

3.69

0.39

1.02

6.85

4.44

0.53

1.77

SEATING

PLANE

−T−

0.040

0.70

G

H

J

K

L

0.100 BSC

2.54 BSC

1.27 BSC

K

M

H

0.050 BSC

0.008 0.015

0.110 0.130

0.295 0.305

J

0.21

0.38

3.30

7.74

10

G

2.80

7.50

0

D 16 PL

M

0.25 (0.010)

T A

M

S

0

10

_

0.020 0.040

0.51

1.01

SOIC−16

CASE 751B−05

ISSUE J

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

−A−

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.

16

9

8

−B−

P 8 PL

M

S

B

0.25 (0.010)

1

MILLIMETERS

INCHES

MIN

G

DIM MIN

MAX

10.00

4.00

1.75

0.49

1.25

MAX

0.393

0.157

0.068

0.019

0.049

A

B

C

D

F

9.80

3.80

1.35

0.35

0.40

0.386

0.150

0.054

0.014

0.016

F

R X 45

K

_

G

J

1.27 BSC

0.050 BSC

C

0.19

0.10

0

0.25

7

0.008

0.004

0

0.009

7

−T−

SEATING

PLANE

K

M

P

R

J

_

M

5.80

0.25

6.20

0.50

0.229

0.010

0.244

0.019

D

16 PL

M

S

0.25 (0.010)

T B

A

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6

MC14028B

PACKAGE DIMENSIONS

SOEIAJ−16

CASE 966−01

ISSUE A

NOTES:

ꢁꢂ1. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

L

E

16

9

ꢁꢂ2. CONTROLLING DIMENSION: MILLIMETER.

ꢁꢂ3. DIMENSIONS D AND E DO NOT INCLUDE

MOLD FLASH OR PROTRUSIONS AND ARE

MEASURED AT THE PARTING LINE. MOLD FLASH

OR PROTRUSIONS SHALL NOT EXCEED 0.15

(0.006) PER SIDE.

Q

1

H

E

M

_

E

ꢁꢂ4. TERMINAL NUMBERS ARE SHOWN FOR

REFERENCE ONLY.

1

8

L

ꢁꢂ5. THE LEAD WIDTH DIMENSION (b) DOES NOT

INCLUDE DAMBAR PROTRUSION. ALLOWABLE

DAMBAR PROTRUSION SHALL BE 0.08 (0.003)

TOTAL IN EXCESS OF THE LEAD WIDTH

DIMENSION AT MAXIMUM MATERIAL CONDITION.

DAMBAR CANNOT BE LOCATED ON THE LOWER

RADIUS OR THE FOOT. MINIMUM SPACE

BETWEEN PROTRUSIONS AND ADJACENT LEAD

TO BE 0.46 ( 0.018).

DETAIL P

Z

D

VIEW P

e

A

c

MILLIMETERS

INCHES

MIN

−−−

DIM MIN

MAX

0.081

0.008

0.020

0.011

0.413

0.215

A

−−−

0.05

0.35

0.10

9.90

5.10

2.05

A

1

0.20 0.002

0.50 0.014

0.20 0.007

1

b

0.13 (0.005)

b

c

0.10 (0.004)

M

D

E

10.50

5.45 0.201

0.390

e

1.27 BSC

0.050 BSC

H

7.40

0.50

1.10

8.20 0.291

0.85 0.020

1.50 0.043

0.323

0.033

0.059

E

L

E

0

10

0.90 0.028

10

_

0.035

0.031

M

Q

0

_

0.70

−−−

1

Z

0.78

−−−

ON Semiconductor and

are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice

to any products herein. SCILLC makes no warranty, representation 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, or authorized for use as components in systems intended for surgical implant into the body, or other applications

intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should

Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates,

and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death

associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal

Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

PUBLICATION ORDERING INFORMATION

LITERATURE FULFILLMENT:

N. American Technical Support: 800−282−9855 Toll Free

USA/Canada

Europe, Middle East and Africa Technical Support:

Phone: 421 33 790 2910

Japan Customer Focus Center

Phone: 81−3−5773−3850

ON Semiconductor Website: www.onsemi.com

Order Literature: http://www.onsemi.com/orderlit

Literature Distribution Center for ON Semiconductor

P.O. Box 5163, Denver, Colorado 80217 USA

Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada

Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada

Email: orderlit@onsemi.com

For additional information, please contact your local

Sales Representative

MC14028B/D

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7


型号：	MC14028B_06
厂家：	ONSEMI
描述：	BCD−To−Decimal Decoder Binary−To−Octal Decoder BCD到十进制解码器二进制到八进制解码器解码器 CD
文件：	总7页 (文件大小：123K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MC14028B_06 [ONSEMI]

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