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Rohm Semiconductor Electronic Components Datasheet

BU4028 Datasheet

BCD-to-decimal decoder

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Standard ICs
BCD-to-decimal decoder
BU4028B
The BU4028B is a decoder which converts BCD signals to decimal signals.
Of the ten outputs Q0 to Q9, those corresponding to the A to D input codes are set to “H”, and the others are all set to
“L”.
If inputs A to C are used and input D is used as disabled input, the BU4028B can also be used as a 1-of-8 decoder.
Features
1) Low power dissipation.
2) Wide range of operating power supply voltages.
3) High input impedance.
Block diagram
Q4 1
Q2 2
Q0 3
Q7 4
Q9 5
Q5 6
Q6 7
VSS 8
Q4
Q2 Q3
Q0 Q1
Q7 B
Q9 C
Q5 D
Q6 A
Q8
16 VDD
15 Q3
14 Q1
13 B
12 C
IN
11 D
10 A
9 Q8
4) High fan-out.
5) Direct drive of 2 L-TTL inputs and 1LS-TTL input.
Logic circuit diagram
A
B
C
D
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
1


Rohm Semiconductor Electronic Components Datasheet

BU4028 Datasheet

BCD-to-decimal decoder

No Preview Available !

Standard ICs
Truth table
INPUT
DCB
LLL
LLL
L LH
L LH
LHL
LHL
L HH
L HH
HL L
HL L
HLH
HLH
HH L
HH L
HHH
HHH
BA4028B
OUTPUT
A Q9 Q8 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0
L L L L L L L L L LH
HL L L L L L L LHL
L L L L L L L LHL L
HL L L L L LHL L L
L L L L L LHL L L L
HL L L LHL L L L L
L L L LHL L L L L L
HL LHL L L L L L L
L LHL L L L L L L L
HHL L L L L L L L L
LLLLLLLLLLL
HL L L L L L L L L L
LLLLLLLLLLL
HL L L L L L L L L L
LLLLLLLLLLL
HL L L L L L L L L L
Absolute maximum ratings (Ta = 25°C, VSS = 0V)
Parameter
Symbol
Limits
Power supply voltage
VDD – 0.3 ~ + 18
Power dissipation
Pd 1000 (DIP)
Operating temperature
Topr
– 40 ~ + 85
Storage temperature
Tstg – 55 ~ + 150
Input voltage
VIN – 0.3 ~ VDD + 0.3
Unit
V
mW
°C
°C
V
2


Part Number BU4028
Description BCD-to-decimal decoder
Maker Rohm
Total Page 6 Pages
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