MC74F240 查看數據表（PDF） - Motorola => Freescale
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MC74F240 Datasheet PDF : 4 Pages
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MC54/74F240 • MC54/74F241 • MC54/74F244
AC CHARACTERISTICS – MC54/74F240
54/74F
54F
74F
Symbol
Parameter
TA = +25°C
TA = -55°C to +125°C TA = 0°C to +70°C
VCC = +5.0 V
VCC = 5.0 V ± 10% VCC = 5.0 V ± 10%
CL = 50 pF
CL = 50 pF
CL = 50 pF
Min
Typ
Max
Min
Max
Min
Max
Unit
tPLH
Propagation Delay, Data to Output 2.5
5.1
7.0
2.5
9.0
2.5
8.0
ns
tPHL
1.5
3.5
4.7
1.5
6.0
1.5
5.7
tPZH
Output Enable Time
2.0
3.5
5.2
2.0
6.5
2.0
5.7
ns
tPZL
4.0
6.9
9.0
4.0
13.5
4.0
10
tPHZ
tPLZ
Output Disable Time
2.0
4.0
5.3
2.0
6.5
2.0
6.3
ns
1.5
6.0
8.0
2.0
12.5
1.5
9.5
AC CHARACTERISTICS – MC54/74F241
54/74F
54F
74F
Symbol
Parameter
TA = +25°C
TA = -55°C to +125°C TA = 0°C to +70°C
VCC = +5.0 V
VCC = 5.0 V ± 10% VCC = 5.0 V ± 10%
CL = 50 pF
CL = 50 pF
CL = 50 pF
Min
Typ
Max
Min
Max
Min
Max
Unit
tPLH
Propagation Delay, Data to Output 2.5
4.0
5.2
2.0
6.5
2.5
6.2
ns
tPHL
2.5
4.0
5.2
2.0
7.0
2.5
6.5
tPZH
Output Enable Time
2.0
4.3
5.7
2.0
7.0
2.0
6.7
ns
tPZL
2.0
5.4
7.0
2.0
8.5
2.0
8.0
tPHZ
tPLZ
Output Disable Time
2.0
4.5
6.0
2.0
7.0
2.0
7.0
ns
2.0
4.5
6.5
2.0
12.5
2.0
7.5
AC CHARACTERISTICS – MC54/74F244
54/74F
54F
74F
Symbol
Parameter
TA = +25°C
TA = -55°C to +125°C TA = 0°C to +70°C
VCC = +5.0 V
VCC = 5.0 V ± 10% VCC = 5.0 V ± 10%
CL = 50 pF
CL = 50 pF
CL = 50 pF
Min
Typ
Max
Min
Max
Min
Max
Unit
tPLH
Propagation Delay, Data to Output 2.5
4.0
5.2
2.5
6.5
2.5
6.2
ns
tPHL
2.5
4.0
5.2
2.5
7.0
2.5
6.5
tPZH
Output Enable Time
2.0
4.3
5.7
2.0
7.0
2.0
6.7
ns
tPZL
2.0
5.4
7.0
2.0
8.5
2.0
8.0
tPHZ
Output Disable Time
2.0
4.5
6.0
2.0
7.0
2.0
7.0
ns
tPLZ
2.0
4.5
6.0
2.0
10.0
2.0
7.0
FAST AND LS TTL DATA
4-111
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