BCD-TO-DECIMAL DECODER DESCRIPTION M54/74HC42 high speed CMOS BCD

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BCD-TO-DECIMAL DECODER DESCRIPTION M54/74HC42 high speed CMOS BCD

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HS-CMOS
BCD-TO-DECIMAL DECODER DESCRIPTION
M54/74HC42 high speed CMOS BCD-TO-DECIMAL DECODER fabricated silicon gate C2MOS technology.
same high speed performance LSTTL combined with true CMOS power consumption. code applied four inputs (A-D) provides level select decimal decoded outputs. illegal code such eleven thru fifteen gives high level outputs. This device also used 3-to-8 LINE DECODER, when input assigned disable input.
This device useful code conversion, address decoding, memory selection, demultiplexing, readout decoding.
inputs equipped with protection circuit against static discharge transient excess voltage.
High Speed
tPD= (Typ.)
Power Dissipation
(Max.)
High Noise Immunity Vnih VN|L (Min.) Output Drive Capability LSTTL Loads Symmetrical Output Impedance IohI (Min.) Balanced Propagation Delays
tpi_H tpHL
Wide Operating Voltage Range (opr) Function compatible with 54/74LS42
PRELIMINARY DATA
Plastic Package Ceramic Package Chip Carrier ORDERING NUMBERS: M54HC42 M74HC42 M74HC42 M74HC42
CONNECTIONS
(top view)
3VCC
Dual line
CHIP CARRIER
nnnnn
Internal Connection
7/84
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LOGIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Supply Voltage -0.5
Input Voltage
Output Voltage -0.5
Input Diode Current
Output Diode Current
Output Source Sink Current Output
!gnd Ground Current
Power Dissipation
Tstg Storage Temperature
Absolute Maximum Ratings those values beyond which damage device occur. Functional operation under these condition implied.
derate
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Limit Unit
Supply Voltage
Input Voltage
Output Voltage
74HC Series Operating Temperature 54HC SeneE
Input Rise Fall Time 4.5V 1000
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M54HG42 M74HC42
TRUTH TABLE
CODE INPUTS DECIMAL OUTPUTS
SPECIFICATIONS
Symbol Parameter Test Condition 54HC 74HC 74HC 54HC Unit
Min. Typ. Max. Min. Max. Min. Max.
High Level Input Voltage 3.15 3.15 3.15
Level Input Voltage 1.35 1.35 1.35
High Level Output Voltage
-4.0 -5.2 4.18 5.68 4.31 4.13 5.63 4.10 5.60
Level Output Voltage
0.17 0.18 0.26 0.26 0.33 0.33 0.40 0.40
Input Leakage Current
Quiescent Supply Current
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M54HC42 M74HC42
ELECTRICAL CHARACTERISTICS (VCC CL=15pF, Input 6ns)
Symbol 54HC 74HC
Parameter MIN. TYP. MAX. Unit
lTLH 'thl Output Transition Time
tpLH <PHL Propagation Delay Time
ELECTRICAL CHARACTERISTICS 50pF, Input 6ns)
Symbol Parameter Test Condition 54HC 74HC 74HC 54HC Unit
Min. Typ. Max. Min. Max. Min. Max.
lTLH Output Transition
tTHL Time
tpLH Propagation Delay
tpHL Time
Input Capacitance
Power Dissipation
Capacitance
Note defined value IC's internal equivalent capacitance which calculated from operating current consumption without load.
Average operating current obtained following equation.
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BCD-TO-DECIMAL DECODER DESCRIPTION M54/74HC42 high speed CMOS BCD

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