MC14028BCP - Motorola / Freescale Semiconductor

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.

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

MAXIMUM RATINGS* (Voltages Referenced to VSS)

ÎÎÎÎ

Symbol

ÎÎÎÎÎÎÎÎÎÎÎ

Parameter

ÎÎÎÎÎÎ

Value

ÎÎÎ

Unit

ÎÎÎÎ

VDD

ÎÎÎÎÎÎÎÎÎÎÎ

DC Supply Voltage

ÎÎÎÎÎÎ

– 0.5 to + 18.0

ÎÎÎ

ÎÎÎÎ

Vin, Vout

ÎÎÎÎÎÎÎÎÎÎÎ

Input or Output Voltage (DC or Transient)

ÎÎÎÎÎÎ

– 0.5 to VDD + 0.5

ÎÎÎ

ÎÎÎÎ

lin, lout

ÎÎÎÎÎÎÎÎÎÎÎ

Input or Output Current (DC or Transient),

per Pin

ÎÎÎÎÎÎ

± 10

ÎÎÎ

ÎÎÎÎ

ÎÎÎÎÎÎÎÎÎÎÎ

Power Dissipation, per Package†

ÎÎÎÎÎÎ

500

ÎÎÎ

ÎÎÎÎ

Tstg

ÎÎÎÎÎÎÎÎÎÎÎ

Storage Temperature

ÎÎÎÎÎÎ

– 65 to + 150

ÎÎÎ

ÎÎÎÎ

ÎÎÎÎÎÎÎÎÎÎÎ

Lead Temperature (8–Second Soldering)

ÎÎÎÎÎÎ

260

ÎÎÎ

*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

Ceramic “L” Packages: – 12 mW/

C From 100

C To 125

BLOCK DIAGRAM

8421

BCD

INPUTS

DECIMAL

DECODED

OUTPUTS

OCTAL

DECODED

OUTPUTS

D Q9

3–BIT

BINARY

INPUTS

VDD = PIN 16

VSS = PIN 8

TRUTH TABLE

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

00000000000001

00010000000010

00100000000100

00110000001000

01000000010000

01010000100000

01100001000000

01110010000000

10000100000000

10011000000000

10100000000000

10110000000000

11000000000000

11010000000000

11100000000000

11110000000000



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

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

ELECTRICAL CHARACTERISTICS (Voltages Referenced to VSS)

ÎÎÎÎÎÎÎÎÎÎ

Characteristic

ÎÎÎÎ

Symbol

ÎÎÎ

VDD

Vdc

ÎÎÎÎÎÎ

– 55

ÎÎÎÎÎÎÎÎ

ÎÎÎÎÎÎ

125

ÎÎÎ

Unit

ÎÎÎÎÎÎÎÎÎÎ

Characteristic

ÎÎÎÎ

Symbol

ÎÎÎ

VDD

Vdc

ÎÎÎ

Min

ÎÎÎÎ

Max

ÎÎÎ

Min

ÎÎÎÎ

Typ #

ÎÎÎ

Max

ÎÎÎÎ

Min

ÎÎÎ

Max

ÎÎÎ

Unit

ÎÎÎÎÎÎÎÎÎÎ

Output Voltage

“0” Level

Vin = VDD or 0

“1” Level

Vin = 0 or VDD

ÎÎÎÎ

VOL

ÎÎÎ

5.0

ÎÎÎ

—

ÎÎÎÎ

0.05

ÎÎÎ

—

ÎÎÎÎ

ÎÎÎ

0.05

ÎÎÎÎ

—

ÎÎÎ

0.05

ÎÎÎ

Vdc

ÎÎÎÎÎÎÎÎÎÎ

“1” Level

Vin = 0 or VDD

ÎÎÎÎ

VOH

ÎÎÎ

5.0

ÎÎÎ

4.95

9.95

14.95

ÎÎÎÎ

—

ÎÎÎ

4.95

9.95

14.95

ÎÎÎÎ

5.0

ÎÎÎ

—

ÎÎÎÎ

4.95

9.95

14.95

ÎÎÎ

—

ÎÎÎ

Vdc

ÎÎÎÎÎÎÎÎÎÎ

Input Voltage

“0” Level

(VO = 4.5 or 0.5 Vdc)

(VO = 9.0 or 1.0 Vdc)

(VO = 13.5 or 1.5 Vdc)

“1” Level

(VO = 0.5 or 4.5 Vdc)

(VO = 1.0 or 9.0 Vdc)

(VO = 1.5 or 13.5 Vdc)

ÎÎÎÎ

VIL

ÎÎÎ

5.0

ÎÎÎ

—

ÎÎÎÎ

1.5

3.0

4.0

ÎÎÎ

—

ÎÎÎÎ

2.25

4.50

6.75

ÎÎÎ

1.5

3.0

4.0

ÎÎÎÎ

—

ÎÎÎ

1.5

3.0

4.0

ÎÎÎ

Vdc

ÎÎÎÎÎÎÎÎÎÎ

“1” Level

(VO = 0.5 or 4.5 Vdc)

(VO = 1.0 or 9.0 Vdc)

(VO = 1.5 or 13.5 Vdc)

ÎÎÎÎ

VIH

ÎÎÎ

5.0

ÎÎÎ

3.5

7.0

ÎÎÎÎ

—

ÎÎÎ

3.5

7.0

ÎÎÎÎ

2.75

5.50

8.25

ÎÎÎ

—

ÎÎÎÎ

3.5

7.0

ÎÎÎ

—

ÎÎÎ

Vdc

ÎÎÎÎÎÎÎÎÎÎ

Output Drive Current

(VOH = 2.5 Vdc) Source

(VOH = 4.6 Vdc)

(VOH = 9.5 Vdc)

(VOH = 13.5 Vdc)

ÎÎÎÎ

IOH

ÎÎÎ

5.0

ÎÎÎ

– 3.0

– 0.64

– 1.6

– 4.2

ÎÎÎÎ

—

ÎÎÎ

– 2.4

– 0.51

– 1.3

– 3.4

ÎÎÎÎ

– 4.2

– 0.88

– 2.25

– 8.8

ÎÎÎ

—

ÎÎÎÎ

– 1.7

– 0.36

– 0.9

– 2.4

ÎÎÎ

—

ÎÎÎ

mAdc

ÎÎÎÎÎÎÎÎÎÎ

(VOL = 0.4 Vdc) Sink

(VOL = 0.5 Vdc)

(VOL = 1.5 Vdc)

ÎÎÎÎ

IOL

ÎÎÎ

5.0

ÎÎÎ

0.64

1.6

4.2

ÎÎÎÎ

—

ÎÎÎ

0.51

1.3

3.4

ÎÎÎÎ

0.88

2.25

8.8

ÎÎÎ

—

ÎÎÎÎ

0.36

0.9

2.4

ÎÎÎ

—

ÎÎÎ

mAdc

ÎÎÎÎÎÎÎÎÎÎ

Input Current

ÎÎÎÎ

Iin

ÎÎÎ

—

ÎÎÎÎ

± 0.1

ÎÎÎ

—

ÎÎÎÎ

±0.00001

ÎÎÎ

± 0.1

ÎÎÎÎ

—

ÎÎÎ

± 1.0

ÎÎÎ

µAdc

ÎÎÎÎÎÎÎÎÎÎ

Input Capacitance

(Vin = 0)

ÎÎÎÎ

Cin

ÎÎÎ

—

ÎÎÎ

—

ÎÎÎÎ

—

ÎÎÎ

—

ÎÎÎÎ

5.0

ÎÎÎ

7.5

ÎÎÎÎ

—

ÎÎÎ

—

ÎÎÎ

ÎÎÎÎÎÎÎÎÎÎ

Quiescent Current

(Per Package)

ÎÎÎÎ

IDD

ÎÎÎ

5.0

ÎÎÎ

—

ÎÎÎÎ

5.0

ÎÎÎ

—

ÎÎÎÎ

0.005

0.010

0.015

ÎÎÎ

5.0

ÎÎÎÎ

—

ÎÎÎ

150

300

600

ÎÎÎ

µAdc

ÎÎÎÎÎÎÎÎÎÎ

Total Supply Current**†

(Dynamic plus Quiescent,

Per Package)

(CL = 50 pF on all outputs, all

buffers switching)

ÎÎÎÎ

ÎÎÎ

5.0

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

IT = (0.3 µA/kHz) f + IDD

IT = (0.6 µA/kHz) f + IDD

IT = (0.9 µA/kHz) f + IDD

ÎÎÎ

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

†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

Vout should be constrained to the range VSS ≤ (Vin or Vout) ≤ 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

125

VDD

VSS

MOTOROLA CMOS LOGIC DATA 115

MC14028B

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

SWITCHING CHARACTERISTICS* (CL = 50 pF, TA = 25

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

Characteristic

ÎÎÎÎ

Symbol

ÎÎÎÎÎ

VDD

ÎÎÎÎ

Min

ÎÎÎÎ

Typ #

ÎÎÎÎ

Max

ÎÎÎ

Unit

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

Output Rise and Fall Time

tTLH, tTHL = (1.5 ns/pF) CL + 25 ns

tTLH, tTHL = (0.75 ns/pF) CL + 12.5 ns

tTLH, tTHL = (0.55 ns/pF) CL + 9.5 ns

ÎÎÎÎ

tTLH,

tTHL

ÎÎÎÎÎ

5.0

ÎÎÎÎ

—

ÎÎÎÎ

100

ÎÎÎÎ

200

100

ÎÎÎ

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ

Propagation Delay Time

tPLH, tPHL = (1.7 ns/pF) CL + 215 ns

tPLH, tPHL = (0.66 ns/pF) CL + 97 ns

tPLH, tPHL = (0.5 ns/pF) CL + 65 ns

ÎÎÎÎ

tPLH,

tPHL

ÎÎÎÎÎ

5.0

ÎÎÎÎ

—

ÎÎÎÎ

300

130

ÎÎÎÎ

600

260

180

ÎÎÎ

*The formulas given are for the typical characteristics only at 25

#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

VDD

VSS

20 ns 20 ns

INPUT A

INPUT C

10%

90% 50% VDD

VSS

VOH

VOL

tPLH tPHL

tTLH tTHL

50%

90%

10%

MOTOROLA CMOS LOGIC DATAMC14028B

116

LOGIC DIAGRAM

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 hexadeci-

mal 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 in-

verters.

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

MC14028B

C B A

D C B A D C B A

MC14028B

Q9 Q0 Q9 Q0

15 –8 15 –0

OUTPUT NUMBERS

Inputs

Output Numbers

Code and Redefined

Output Numbers

Inputs

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

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

MC14028B

DQ8

9029 1 0

APPROPRIATE

VOLTAGE

NEON

DISPLAY

APPROPRIATE

VOLTAGE

INCANDESCENT

DISPLAY

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–

HGD

16 PL

SEATING

1 8

916

PLANE

–T–

0.25 (0.010) T

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A0.740 0.770 18.80 19.55

B0.250 0.270 6.35 6.85

C0.145 0.175 3.69 4.44

D0.015 0.021 0.39 0.53

F0.040 0.70 1.02 1.77

G0.100 BSC 2.54 BSC

H0.050 BSC 1.27 BSC

J0.008 0.015 0.21 0.38

K0.110 0.130 2.80 3.30

L0.295 0.305 7.50 7.74

M0 10 0 10

S0.020 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–

SEATING

PLANE

16 PLD

0.25 (0.010) T

16 PLJ

0.25 (0.010) T

DIM MIN MAX MIN MAX

MILLIMETERSINCHES

A0.750 0.785 19.05 19.93

B0.240 0.295 6.10 7.49

C––– 0.200 ––– 5.08

D0.015 0.020 0.39 0.50

E0.050 BSC 1.27 BSC

F0.055 0.065 1.40 1.65

G0.100 BSC 2.54 BSC

H0.008 0.015 0.21 0.38

K0.125 0.170 3.18 4.31

L0.300 BSC 7.62 BSC

M0 15 0 15

N0.020 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

RX 45

8 PLP

–B–

–A–

0.25 (0.010) B S

–T–

16 PL

0.25 (0.010) A S

DIM MIN MAX MIN MAX

INCHESMILLIMETERS

A9.80 10.00 0.386 0.393

B3.80 4.00 0.150 0.157

C1.35 1.75 0.054 0.068

D0.35 0.49 0.014 0.019

F0.40 1.25 0.016 0.049

G1.27 BSC 0.050 BSC

J0.19 0.25 0.008 0.009

K0.10 0.25 0.004 0.009

M0 7 0 7

P5.80 6.20 0.229 0.244

R0.25 0.50 0.010 0.019

____

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the suitability of its products for any particular purpose, nor does Motorola 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 consequential or incidental damages. “T ypical” parameters which may be provided

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MC14028B/D

*MC14028B/D*

◊