MC14028B 查看數據表（PDF） - Motorola => Freescale
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MC14028B Datasheet PDF : 7 Pages
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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 (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.
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 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
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ • Similar to CD4028B.
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ MAXIMUM RATINGS* (Voltages Referenced to VSS)
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Symbol
Parameter
Value
Unit
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ VDD DC Supply Voltage
– 0.5 to + 18.0
V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Vin, Vout Input or Output Voltage (DC or Transient) – 0.5 to VDD + 0.5 V
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ lin, lout Input or Output Current (DC or Transient),
± 10
mA
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ per Pin
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ PD Power Dissipation, per Package†
500
mW
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ Tstg Storage Temperature
– 65 to + 150
_C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ TL
Lead Temperature (8–Second Soldering)
260
_C
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ * 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
D SUFFIX
SOIC
CASE 751B
ORDERING INFORMATION
MC14XXXBCP
MC14XXXBCL
MC14XXXBD
Plastic
Ceramic
SOIC
TA = – 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
3–BIT
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
113
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