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74VHC245 bảng dữ liệu(PDF) 4 Page - STMicroelectronics

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74VHC245 bảng dữ liệu(HTML) 4 Page - STMicroelectronics

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Table 7: AC Electrical Characteristics (Input tr = tf = 3ns)
(*) Voltage range is 3.3V
± 0.3V
(**) Voltage range is 5.0V
± 0.5V
Note 1: Parameter guaranteed by design. tsoLH = |tpLHm - tpLHn|, tsoHL = |tpHLm - tpHLn|
Table 8: Capacitive Characteristics
1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without
load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC/8 (per circuit)
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
CL
(pF)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
tPLH
tPHL
Propagation Delay
Time
3.3(*)
15
5.8
8.4
1.0
10.0
1.0
10.0
ns
3.3(*)
50
8.3
11.9
1.0
13.5
1.0
13.5
5.0(**)
15
4.0
5.5
1.0
6.5
1.0
6.5
5.0(**)
50
5.5
7.5
1.0
8.5
1.0
8.5
tPZL
tPZH
Output Disable
Time
3.3(*)
15
RL = 1KΩ
8.5
13.2
1.0
15.5
1.0
15.5
ns
3.3(*)
50
RL = 1KΩ
11.0
16.7
1.0
19.0
1.0
19.0
5.0(**)
15
RL = 1KΩ
5.8
8.5
1.0
10.0
1.0
10.0
5.0(**)
50
RL = 1KΩ
7.3
10.6
1.0
12.0
1.0
12.0
tPLZ
tPHZ
Output Enable
Time
3.3(*)
50
RL = 1KΩ
11.5
15.8
1.0
18.0
1.0
18.0
ns
5.0(**)
50
RL = 1KΩ
7.0
9.7
1.0
11.0
1.0
11.0
tOSLH
tOSHL
Output to Output
Skew time (note 1)
3.3(*)
50
1.5
1.5
1.5
ns
5.0(**)
50
1.0
1.0
1.0
Symbol
Parameter
Test Condition
Value
Unit
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
CIN
Input Capacitance
410
10
10
pF
CI/O
Output
Capacitance
8pF
CPD
Power Dissipation
Capacitance
(note 1)
21
pF



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