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CD74HC42 Datasheet(PDF) 5 Page - Texas Instruments

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No. de pieza CD74HC42
Descripción Electrónicos  High-Speed CMOS Logic BCD-to-Decimal Decoders
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Fabricante Electrónico  TI [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI - Texas Instruments

CD74HC42 Datasheet(HTML) 5 Page - Texas Instruments

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5
Power Dissipation Capacitance
(Notes 3, 4)
CPD
-5
-
65
-
-
-
-
-
pF
HCT TYPES
Propagation Delay,
Input to Y (Figure 2)
tPLH, tPHL
CL = 50pF
4.5
-
-
35
-
44
-
53
ns
Any Input to YtPLH, tPHL
CL = 15pF
5
-
14
-
-
-
-
-
ns
Output Transition Time
(Figure 2)
tTLH, tTHL
CL = 50pF
4.5
-
-
15
-
19
-
22
ns
Input Capacitance
CIN
-
-
-
-
10
-
10
-
10
pF
Power Dissipation Capacitance
(Notes 3, 4)
CPD
-5
-
70
-
-
-
-
-
pF
NOTES:
3. CPD is used to determine the dynamic power consumption, per package.
4. PD = VCC
2 f
i (CPD + CL) where: fi = Input Frequency, CL = Output Load Capacitance, VCC = Supply Voltage.
Switching Specifications Input tr, tf = 6ns (Continued)
PARAMETER
SYMBOL
TEST
CONDITIONS
VCC (V)
25oC
-40oC TO
85oC
-55oC TO
125oC
UNITS
MIN
TYP
MAX
MIN
MAX
MIN
MAX
Test Circuits and Waveforms
FIGURE 1. HC AND HCU TRANSITION TIMES AND PROPAGA-
TION DELAY TIMES, COMBINATION LOGIC
FIGURE 2. HCT TRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
tPHL
tPLH
tTHL
tTLH
90%
50%
10%
50%
10%
INVERTING
OUTPUT
INPUT
GND
VCC
tr = 6ns
tf = 6ns
90%
tPHL
tPLH
tTHL
tTLH
2.7V
1.3V
0.3V
1.3V
10%
INVERTING
OUTPUT
INPUT
GND
3V
tr = 6ns
tf = 6ns
90%
CD54HC42, CD74HC42, CD74HCT42


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