HCF4028B
BCD TO DECIMAL DECODER
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BCD TO DECIMAL DECODING OR BINARY
TO OCTAL DECODING
HIGH DECODED OUTPUT DRIVE
CAPABILITY
"POSITIVE LOGIC" INPUTS AND OUTPUTS:
DECODED OUTPUTS GO HIGH ON
SELECTION
MEDIUM SPEED OPERATION : tPHL, tPLH =
80ns (Typ.) at VDD = 10V
QUIESCENT CURRENT SPECIF. UP TO 20V
STANDARDIZED SYMMETRICAL OUTPUT
CHARACTERISTICS
INPUT LEAKAGE CURRENT
II = 100nA (MAX) AT VDD = 18V TA = 25°C
100% TESTED FOR QUIESCENT CURRENT
MEETS ALL REQUIREMENTS OF JEDEC
JESD13B "STANDARD SPECIFICATIONS
FOR DESCRIPTION OF B SERIES CMOS
DEVICES"
SOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
HCF4028BEY
HCF4028BM1
)
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T&R
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HCF4028M013TR
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P
inputs, decoding logic gates, and 10 output
buffers.
A BCD code applied to the four inputs, A to D,
results in a high level at the selected one of 10
decimal decoded outputs. Similarly, a 3-bit binary
code applied to inputs A through C is decoded in
octal code at output 0 to 7 if D = "0". High drive
capability is provided at all outputs to enhance dc
and dynamic performance in high fan-out
applications.
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DESCRIPTION
HCF4028B is a monolithic integrated circuit
fabricated in Metal Oxide Semiconductor
technology available in DIP and SOP packages.
HCF4028B is a BCD to DECIMAL or BINARY to
OCTAL decoder consisting of buffering on all 4
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DIP
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PIN CONNECTION
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September 2002
1/10
HCF4028B
IINPUT EQUIVALENT CIRCUIT
PIN DESCRIPTION
PIN No
10, 13, 12,
11
10, 13, 12
3, 14, 2, 15,
1, 6, 7, 4, 9,
5
3, 14, 2, 15,
1, 6, 7, 4
SYMBOL
A, B, C, D
NAME AND FUNCTION
BCD Data Inputs
A, B, C
3-Bit Binary Inputs
0 to 9
Buffered DECIMAL
Decoded Outputs
0 to 7
Buffered OCTAL Decoded
Outputs
8
VSS
Negative Supply Voltage
16
VDD
Positive Supply Voltage
FUNCTIONAL DIAGRAM
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INPUTS
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TRUTH TABLE
D
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OUTPUTS
HCF4028B
LOGIC DIAGRAM
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ABSOLUTE MAXIMUM RATINGS
Symbol
VDD
Parameter
Supply Voltage
VI
DC Input Voltage
II
DC Input Current
PD
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Top
Power Dissipation per Package
Power Dissipation per Output Transistor
Operating Temperature
Tstg
Storage Temperature
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Value
Unit
-0.5 to +22
V
-0.5 to VDD + 0.5
± 10
V
mA
200
100
mW
mW
-55 to +125
°C
-65 to +150
°C
Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is
not implied.
All voltage values are referred to VSS pin voltage.
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RECOMMENDED OPERATING CONDITIONS
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Symbol
bs
VDD
O
VI
Top
Supply Voltage
Input Voltage
Operating Temperature
Parameter
Value
Unit
3 to 20
V
0 to VDD
V
-55 to 125
°C
3/10
HCF4028B
DC SPECIFICATIONS
Test Conditions
Symbol
IL
Parameter
Quiescent Current
0/5
0/10
0/15
0/20
0/5
0/10
0/15
5/0
10/0
15/0
High Level Output
Voltage
VOH
Low Level Output
Voltage
VOL
High Level Input
Voltage
VIH
Low Level Input
Voltage
VIL
Output Drive
Current
IOH
0/5
0/5
0/10
0/15
0/5
0/10
0/15
Output Sink
Current
IOL
Input Leakage
Current
Input Capacitance
II
CI
IO VDD
(µA) (V)
VO
(V)
VI
(V)
0.5/4.5
1/9
1.5/18.5
0.5/4.5
9/1
1.5/18.5
2.5
4.6
9.5
13.5
0.4
0.5
1.5
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