MC54F243 查看數據表（PDF） - Motorola => Freescale
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MC54F243 Datasheet PDF : 5 Pages
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MC54/74F242 • MC54/74F243
AC CHARACTERISTICS – MC54/74F242
54/74F
54F
74F
TA = +25°C
VCC = +5.0 V
CL = 50 pF
TA = -55°C to +125°C
VCC = 5.0 V ±10%
CL = 50 pF
TA = 0°C to 70°C
VCC = 5.0 V ± 10%
CL = 50 pF
Symbol
Parameter
Min
Max
Min
Max
Min
Max
Unit
tPLH
tPHL
Propagation Delay,
Data to Output
2.5
7.0
2.5
9.0
2.5
8.0
ns
1.5
4.7
1.5
6.0
1.5
5.7
tPZH
tPZL
tPHZ
tPLZ
Output Enable Time
Output Disable Time
2.0
4.7
2.0
6.5
2.0
5.7
ns
4.0
9.0
4.0
12
4.0
10
2.0
5.3
2.0
6.5
2.0
6.3
ns
1.5
6.5
1.5
12.5
1.5
8.0
AC CHARACTERISTICS – MC54/74F243
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
Max
Min
Max
Min
Max
Unit
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay,
Data to Output
Output Enable Time
Output Disable Time
2.5
5.2
2.0
6.5
2.0
6.2
ns
2.5
5.2
2.0
8.5
2.0
6.5
2.0
5.7
2.0
8.0
2.0
6.7
ns
2.0
7.5
2.0
10.5
2.0
8.5
2.0
6.0
1.5
7.5
1.5
7.0
ns
1.5
6.5
2.0
12.5
1.5
7.5
FAST AND LS TTL DATA
4-189
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