TC4028BP/BF
2014-03-01
1
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC4028BP, TC4028BF
TC4028B BCD-to-Decimal Decoder
TC4028B is a BCD-to-DECIMAL decoder which converts BCD
signal into DECIMAL signal.
Of ten outputs from Q0 through Q9, one output corresponding
to input BCD code goes to the “H” level and all the others remain
at the “L” level.
When D is used as inhibit input by use of three input lines
from A to C, this decoder can be served as a BINARY-to-OCTAL
decoder.
Pin Assignment
TC4028BP
TC4028BF
Weight
DIP16-P-300-2.54A : 1.00 g (typ.)
SOP16-P-300-1.27A : 0.18 g (typ.)
Start of commercial production
1978-09
TC4028BP/BF
2014-03-01
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Truth Table
Inputs Outputs
D C B A Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9
L L L L H L L L L L L L L L
L L L H L H L L L L L L L L
L L H L L L H L L L L L L L
L L H H L L L H L L L L L L
L H L L L L L L H L L L L L
L H L H L L L L L H L L L L
L H H L L L L L L L H L L L
L H H H L L L L L L L H L L
H L L L L L L L L L L L H L
H L L H L L L L L L L L L H
H L H L L L L L L L L L L L
H L H H L L L L L L L L L L
H H L L L L L L L L L L L L
H H L H L L L L L L L L L L
H H H L L L L L L L L L L L
H H H H L L L L L L L L L L
H = High level
L = Low level
Logic Diagram
TC4028BP/BF
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Absolute Maximum Ratings (Note)
Characteristics Symbol Rating Unit
DC supply voltage VDD V
SS − 0.5 to VSS + 20 V
Input voltage VIN V
SS − 0.5 to VDD + 0.5 V
Output voltage VOUT V
SS − 0.5 to VDD + 0.5 V
DC input current IIN ±10 mA
Power dissipation PD 300 (DIP)/180 (SOP) mW
Operating temperature range Topr −40 to 85 °C
Storage temperature range Tstg −65 to 150 °C
Note: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Operating Ranges (VSS = 0 V) (Note)
Characteristics Symbol Test Condition Min Typ. Max Unit
DC supply voltage VDD ⎯ 3 ⎯ 18 V
Input voltage VIN ⎯ 0 ⎯ V
DD V
Note: The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either VDD or VSS.
TC4028BP/BF
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Static Electrical Characteristics (VSS = 0 V)
Test Condition −40°C 25°C 85°C
Characteristics Sym-
bol VDD
(V) Min Max Min Typ. Max Min Max
Unit
High-level output
voltage VOH ⎪IOUT⎪ < 1 μA
VIN = VSS, VDD
5
10
15
4.95
9.95
14.95
⎯
⎯
⎯
4.95
9.95
14.95
5.00
10.00
15.00
⎯
⎯
⎯
4.95
9.95
14.95
⎯
⎯
⎯
V
Low-level output
voltage VOL ⎪IOUT⎪ < 1 μA
VIN = VSS, VDD
5
10
15
⎯
⎯
⎯
0.05
0.05
0.05
⎯
⎯
⎯
0.00
0.00
0.00
0.05
0.05
0.05
⎯
⎯
⎯
0.05
0.05
0.05
V
VOH = 4.6 V
VOH = 2.5 V
VOH = 9.5 V
VOH = 13.5 V
5
5
10
15
−0.61
−2.50
−1.50
−4.00
⎯
⎯
⎯
⎯
−0.51
−2.10
−1.30
−3.40
−1.0
−4.0
−2.2
−9.0
⎯
⎯
⎯
⎯
−0.42
−1.70
−1.10
−2.80
⎯
⎯
⎯
⎯
Output high current IOH
VIN = VSS, VDD
mA
VOL = 0.4 V
VOL = 0.5 V
VOL = 1.5 V
5
10
15
0.61
1.50
4.00
⎯
⎯
⎯
0.51
1.30
3.40
1.2
3.2
12.0
⎯
⎯
⎯
0.42
1.10
2.80
⎯
⎯
⎯
Output low current IOL
VIN = VSS, VDD
mA
VOUT = 0.5 V, 4.5 V
VOUT = 1.0 V, 9.0 V
VOUT = 1.5 V, 13.5 V
5
10
15
3.5
7.0
11.0
⎯
⎯
⎯
3.5
7.0
11.0
2.75
5.50
8.25
⎯
⎯
⎯
3.5
7.0
11.0
⎯
⎯
⎯
Input high voltage VIH
⎪IOUT⎪ < 1 μA
V
VOUT = 0.5 V, 4.5 V
VOUT = 1.0 V, 9.0 V
VOUT = 1.5 V, 13.5 V
5
10
15
⎯
⎯
⎯
1.5
3.0
4.0
⎯
⎯
⎯
2.25
4.50
6.75
1.5
3.0
4.0
⎯
⎯
⎯
1.5
3.0
4.0
Input low voltage VIL
⎪IOUT⎪ < 1 μA
V
“H” level IIH V
IH = 18 V 18 ⎯ 0.1 ⎯ 10−50.1 ⎯ 1.0
Input
current “L” level IIL V
IL = 0 V 18 ⎯ −0.1 ⎯ −10−5−0.1 ⎯ −1.0
μA
Quiescent supply
current IDD VIN = VSS, VDD
(Note)
5
10
15
⎯
⎯
⎯
5
10
20
⎯
⎯
⎯
0.005
0.010
0.015
5
10
20
⎯
⎯
⎯
150
300
600
μA
Note: All valid input combinations.
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Dynamic Electrical Characteristics (Ta = 25°C, VSS = 0 V, CL = 50 pF)
Test Condition
Characteristics Symbol
V
DD (V)
Min Typ. Max Unit
Output transition time
(low to high)
tTLH ⎯
5
10
15
⎯
⎯
⎯
70
35
30
200
100
80
ns
Output transition time
(high to low)
tTHL ⎯
5
10
15
⎯
⎯
⎯
70
35
30
200
100
80
ns
Propagation delay time
tpLH
tpHL ⎯
5
10
15
⎯
⎯
⎯
110
55
40
350
160
120
ns
Input capacitance CIN ⎯ ⎯ 5 7.5 pF
Waveform for Measurement of Dynamic Characteristics
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Package Dimensions
Weight: 1.00 g (typ.)
TC4028BP/BF
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Package Dimensions
Weight: 0.18 g (typ.)
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