MM74HCT245 查看數據表（PDF） - Fairchild Semiconductor
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MM74HCT245 Datasheet PDF : 8 Pages
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AC Electrical Characteristics
VCC 5.0V, tr tf 6 ns, TA 25qC (unless otherwise specified)
Symbol
Parameter
Conditions
tPHL, tPLH
tPZL, tPZH
tPLZ, tPHZ
Maximum Output
Propagation Delay
Maximum Output
Enable Time
Maximum Output
Disable Time
CL 45 pF
CL 45 pF
RL 1 k:
CL 5 pF
RL 1 k:
AC Electrical Characteristics
Guaranteed
Typ
Units
Limit
16
20
ns
29
40
ns
20
25
ns
VCC 5.0V r 10%, tr tf 6 ns (unless otherwise specified)
Symbol
Parameter
Conditions
tPHL, tPLH
tPZL
tPZH
tPHZ, tPLZ
tTHL, tTLH
CIN
COUT
Maximum Output
Propagation Delay
Maximum Output
Enable Time
Maximum Output
Enable Time
Maximum Output
Disable Time
Maximum Output
Rise and Fall Time
Maximum Input
Capacitance
Maximum Output/Input
Capacitance
CL 50 pF
CL 150 pF
RL 1 k:
CL 50 pF
RL 1 k:
CL 50 pF
RL 1 k:
CL 50 pF
CL 50 pF
TA
Typ
17
24
31
25qC
23
30
42
TA 40 to 85qC TA 55 to 125qC
Guaranteed Limits
29
34
38
45
53
63
23
33
41
49
21
30
38
45
8
12
15
18
10
15
15
15
20
25
25
25
CPD
Power Dissipation
G VCC (Note 5)
7
Capacitance
G GND
100
Note 5: CPD determines the no load power consumption, PD CPD VCC2 f ICCVCC, and the no load dynamic current consumption,
IS CPD VCC f ICC.
Units
ns
ns
ns
ns
ns
ns
pF
pF
pF
pF
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