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MC14028B Datasheet, PDF (1/7 Pages) Motorola, Inc – BCD-To-Decimal Decoder Binary-To-Octal Decoder | |||
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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 (oneâofâten) decoded output, while a 3âbit
binary input provides a decoded octal (oneâofâeight) code output with D
forced to a logic â0â. Expanded decoding such as binaryâtoâhexadecimal
(oneâofâ16), 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.
L SUFFIX
CERAMIC
CASE 620
P SUFFIX
PLASTIC
CASE 648
⢠Diode Protection on All Inputs
⢠Supply Voltage Range = 3.0 Vdc to 18 Vdc
⢠Capable of Driving Two Lowâpower TTL Loads or One Lowâpower
Schottky TTL Load Over the Rated Temperature Range
⢠Positive Logic Design
⢠Low Outputs on All Illegal Input Combinations
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃà ⢠Similar to CD4028B.
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ MAXIMUM RATINGS* (Voltages Referenced to VSS)
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Symbol
Parameter
Value
Unit
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ VDD DC Supply Voltage
â 0.5 to + 18.0
V
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Vin, Vout Input or Output Voltage (DC or Transient) â 0.5 to VDD + 0.5 V
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ lin, lout Input or Output Current (DC or Transient),
± 10
mA
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ per Pin
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ PD Power Dissipation, per Packageâ
500
mW
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ Tstg Storage Temperature
â 65 to + 150
_C
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ TL
Lead Temperature (8âSecond Soldering)
260
_C
ÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃÃ * Maximum Ratings are those values beyond which damage to the device may occur.
â Temperature Derating:
Plastic âP and D/DWâ Packages: â 7.0 mW/_C From 65_C To 125_C
Ceramic âLâ Packages: â 12 mW/_C From 100_C To 125_C
D SUFFIX
SOIC
CASE 751B
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBD
Plastic
Ceramic
SOIC
TA = â 55° to 125°C for all packages.
TRUTH TABLE
D C B A Q9 Q8 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0
BLOCK DIAGRAM
10
8421
BCD
INPUTS
3âBIT
BINARY 13
INPUTS
12
11
A
Q0
Q1
Q2
B
Q3
Q4
Q5
C Q6
Q7
Q8
D
Q9
3
14
2
15 OCTAL
1 DECODED DECIMAL
6 OUTPUTS DECODED
7
OUTPUTS
4
9
5
VDD = PIN 16
VSS = PIN 8
00 0 0 0 0 0 0 0 0 0 0 0 1
00 0 1 0 0 0 0 0 0 0 0 1 0
00 1 0 0 0 0 0 0 0 0 1 0 0
00 1 1 0 0 0 0 0 0 1 0 0 0
01 0 0 0 0 0 0 0 1 0 0 0 0
01 0 1 0 0 0 0 1 0 0 0 0 0
01 1 0 0 0 0 1 0 0 0 0 0 0
01 1 1 0 0 1 0 0 0 0 0 0 0
10 0 0 0 1 0 0 0 0 0 0 0 0
10 0 1 1 0 0 0 0 0 0 0 0 0
10 1 0 0 0 0 0 0 0 0 0 0 0
10 1 1 0 0 0 0 0 0 0 0 0 0
11 0 0 0 0 0 0 0 0 0 0 0 0
11 0 1 0 0 0 0 0 0 0 0 0 0
11 1 0 0 0 0 0 0 0 0 0 0 0
11 1 1 0 0 0 0 0 0 0 0 0 0
REV 3
1/94
©MMOotoTrOolaR, IOncL. A199C5MOS LOGIC DATA
MC14028B
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