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MC14028B Datasheet(PDF) 1 Page - Motorola, Inc

Part No. MC14028B
Description  BCD-To-Decimal Decoder Binary-To-Octal Decoder
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Maker  MOTOROLA [Motorola, Inc]
Homepage  http://www.freescale.com
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MC14028B Datasheet(HTML) 1 Page - Motorola, Inc

   
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MOTOROLA CMOS LOGIC DATA
113
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.
MAXIMUM RATINGS* (Voltages Referenced to VSS)
Symbol
Parameter
Value
Unit
VDD
DC Supply Voltage
– 0.5 to + 18.0
V
Vin, Vout Input or Output Voltage (DC or Transient)
– 0.5 to VDD + 0.5
V
lin, lout
Input or Output Current (DC or Transient),
per Pin
± 10
mA
PD
Power Dissipation, per Package†
500
mW
Tstg
Storage Temperature
– 65 to + 150
_C
TL
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
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
© Motorola, Inc. 1995
REV 3
1/94
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


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