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74HC244 Arkusz danych(PDF) 4 Page - ON Semiconductor

Numer części 74HC244
Szczegółowy opis  Octal 3?뭆tate Noninverting Buffer/Line Driver/Line Receiver
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Producent  ONSEMI [ON Semiconductor]
Strona internetowa  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

74HC244 Arkusz danych(HTML) 4 Page - ON Semiconductor

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74HC244
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AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
VCC
(V)
Guaranteed Limit
Unit
– 55 to
25_C
v85_C
v125_C
tPLH,
tPHL
Maximum Propagation Delay, A to YA or B to YB
(Figures 1 and 3)
2.0
3.0
4.5
6.0
96
50
18
15
115
60
23
20
135
70
27
23
ns
tPLZ,
tPHZ
Maximum Propagation Delay, Output Enable to YA or YB
(Figures 2 and 4)
2.0
3.0
4.5
6.0
110
60
22
19
140
70
28
24
165
80
33
28
ns
tPZL,
tPZH
Maximum Propagation Delay, Output Enable to YA or YB
(Figures 2 and 4)
2.0
3.0
4.5
6.0
110
60
22
19
140
70
28
24
165
80
33
28
ns
tTLH,
tTHL
Maximum Output Transition Time, Any Output
(Figures 1 and 3)
2.0
3.0
4.5
6.0
60
23
12
10
75
27
15
13
90
32
18
15
ns
Cin
Maximum Input Capacitance
10
10
10
pF
Cout
Maximum Three−State Output Capacitance
(Output in High−Impedance State)
15
15
15
pF
NOTE: For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the ON
Semiconductor High−Speed CMOS Data Book (DL129/D).
CPD
Power Dissipation Capacitance (Per Buffer)*
Typical @ 25°C, VCC = 5.0 V
pF
34
* Used to determine the no−load dynamic power consumption: PD = CPD VCC2f + ICC VCC. For load considerations, see Chapter 2 of the
ON Semiconductor High−Speed CMOS Data Book (DL129/D).
SWITCHING WAVEFORMS
Figure 1.
Figure 2.
VCC
GND
tf
tr
DATA INPUT
A OR B
OUTPUT
YA OR YB
10%
50%
90%
10%
50%
90%
tTLH
tPLH
tPHL
tTHL
ENABLE
A OR B
OUTPUT Y
OUTPUT Y
50%
50%
50%
90%
10%
tPZL
tPLZ
tPZH
tPHZ
VCC
GND
HIGH
IMPEDANCE
VOL
VOH
HIGH
IMPEDANCE


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