
MOTOROLA CMOS LOGIC DATA
6–81
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–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
ÎÎÎÎ
Symbol
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
Parameter
ÎÎÎÎÎÎ
ÎÎÎÎÎÎ
Value
ÎÎÎ
ÎÎÎ
Unit
ÎÎÎÎ
ÎÎÎÎ
VDD
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
DC Supply Voltage
ÎÎÎÎÎÎ
ÎÎÎÎÎÎ
– 0.5 to + 18.0
ÎÎÎ
ÎÎÎ
V
ÎÎÎÎ
ÎÎÎÎ
Vin, Vout
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
Input or Output Voltage (DC or Transient)
ÎÎÎÎÎÎ
ÎÎÎÎÎÎ
– 0.5 to VDD + 0.5
ÎÎÎ
ÎÎÎ
V
ÎÎÎÎ
Î
ÎÎ
Î
ÎÎÎÎ
lin, lout
ÎÎÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎÎÎÎÎ
Î
ÎÎÎÎÎÎÎÎÎÎÎ
Input or Output Current (DC or Transient),
per Pin
ÎÎÎÎÎÎ
Î
ÎÎÎÎ
Î
ÎÎÎÎÎÎ
±
10
ÎÎÎ
Î
Î
Î
ÎÎÎ
mA
ÎÎÎÎ
ÎÎÎÎ
PD
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
Power Dissipation, per Package†
ÎÎÎÎÎÎ
ÎÎÎÎÎÎ
500
ÎÎÎ
ÎÎÎ
mW
ÎÎÎÎ
ÎÎÎÎ
Tstg
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
Storage Temperature
ÎÎÎÎÎÎ
ÎÎÎÎÎÎ
– 65 to + 150
ÎÎÎ
ÎÎÎ
_
C
ÎÎÎÎ
ÎÎÎÎ
TL
ÎÎÎÎÎÎÎÎÎÎÎ
ÎÎÎÎÎÎÎÎÎÎÎ
Lead Temperature (8–Second Soldering)
ÎÎÎÎÎÎ
ÎÎÎÎÎÎ
260
ÎÎÎ
ÎÎÎ
_
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
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
MC14028B
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
Содержание CMOS Logic
Страница 1: ......
Страница 5: ...iv MOTOROLA CMOS LOGIC DATA ...
Страница 6: ...Master Index 1 ...
Страница 12: ...Product Selection Guide 2 ...
Страница 17: ...The Better Program 3 ...
Страница 20: ...B and UB Series Family Data 4 ...
Страница 25: ...CMOS Handling and Design Guidelines 5 ...
Страница 32: ...CMOS Handling and Design Guidelines 5 ...
Страница 39: ...Data Sheets 6 ...
Страница 69: ...MOTOROLA CMOS LOGIC DATA 6 31 MC14008B Figure 5 Logic Diagram Cin A1 B1 A2 B2 A3 B3 A4 B4 S1 S2 S3 S4 Cout ...
Страница 234: ...MOTOROLA CMOS LOGIC DATA MC14174B 6 196 FUNCTIONAL BLOCK DIAGRAM TIMING DIAGRAM ...
Страница 238: ...MOTOROLA CMOS LOGIC DATA MC14175B 6 200 FUNCTIONAL BLOCK DIAGRAM TIMING DIAGRAM ...
Страница 555: ...CMOS Reliability 7 ...
Страница 561: ...Equivalent Gate Count 8 ...
Страница 563: ...Packaging Information Including Surface Mounts 9 ...
Страница 571: ......