MM74HC244WMX 查看數據表（PDF） - Fairchild Semiconductor
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MM74HC244WMX Datasheet PDF : 8 Pages
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AC Electrical Characteristics
VCC 5V, TA 25qC, tr tf 6 ns
Symbol
Parameter
Conditions
tPHL, tPLH
tPZH, tPZL
tPHZ, tPLZ
Maximum Propagation
Delay
Maximum Enable Delay
to Active Output
Maximum Disable Delay
from Active Output
CL 45 pF
RL 1 k:
CL 45 pF
RL 1 k:
CL 5 pF
Guaranteed
Typ
Units
Limit
14
20
ns
17
28
ns
15
25
ns
AC Electrical Characteristics
VCC 2.0V-6.0V, CL 50 pF, tr tf 6 ns (unless otherwise specified)
Symbol
Parameter
Conditions
VCC
TA 25qC
Typ
TA 40 to 85qC TA 55 to 125qC
Guaranteed Limits
tPHL, tPLH Maximum Propagation
CL 50 pF
2.0V
58
115
145
171
Delay
CL 150 pF
2.0V
83
165
208
246
CL 50 pF
4.5V
14
23
29
34
CL 150 pF
4.5V
17
33
42
49
CL 50 pF
6.0V
10
20
25
29
CL 150 pF
6.0V
14
28
35
42
tPZH, tPZL Maximum Output Enable
RL 1 k:
Time
CL 50 pF
2.0V
75
150
189
224
CL 150 pF
2.0V
100
200
252
298
CL 50 pF
4.5V
15
30
38
45
CL 150 pF
4.5V
30
40
50
60
CL 50 pF
6.0V
13
26
32
38
CL 150 pF
6.0V
17
34
43
51
tPHZ, tPLZ Maximum Output Disable RL 1 k:
2.0V
75
150
189
224
Time
CL 50 pF
4.5V
15
30
38
45
6.0V
13
26
32
38
tTLH, tTHL Maximum Output
Rise and Fall Time
2.0V
4.5V
60
75
90
12
15
18
6.0V
10
13
15
CPD
Power Dissipation
Capacitance (Note 5)
CIN
Maximum Input
Capacitance
(per buffer)
G VIH
G VIL
12
50
5
10
10
10
COUT
Maximum Output
Capacitance
10
20
20
20
Note 5: CPD determines the no load dynamic power consumption, PD CPD VCC2f ICC VCC, and the no load dynamic current consumption,
IS CPD VCCf ICC.
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
pF
pF
pF
pF
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