74VHC245TTR 데이터 시트보기 (PDF) - STMicroelectronics
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74VHC245TTR Datasheet PDF : 9 Pages
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74VHC245
AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns)
Test Condition
Value
Symbol
Parameter
VCC CL
(V) (pF)
TA = 25°C
Min. Typ. Max.
tPLH Propagation Delay 3.3(*) 15
5.8
tPHL Time
3.3(*) 50
8.3
5.0(**) 15
4.0
5.0(**) 50
5.5
tPZL
tPZH
Output Disable
Time
3.3(*) 15
3.3(*) 50
RL = 1KΩ
RL = 1KΩ
8.5
11.0
5.0(**) 15 RL = 1KΩ
5.8
5.0(**) 50 RL = 1KΩ
7.3
tPLZ
tPHZ
Output Enable
Time
3.3(*) 50
5.0(**) 50
RL = 1KΩ
RL = 1KΩ
11.5
7.0
tOSLH
tOSHL
Output to Output 3.3(*) 50
Skew time (note 1) 5.0(**) 50
(*) 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|
8.4
11.9
5.5
7.5
13.2
16.7
8.5
10.6
15.8
9.7
1.5
1.0
-40 to 85°C -55 to 125°C
Min. Max. Min. Max.
1.0 10.0 1.0 10.0
1.0 13.5 1.0 13.5
1.0 6.5 1.0 6.5
1.0 8.5 1.0 8.5
1.0 15.5 1.0 15.5
1.0 19.0 1.0 19.0
1.0 10.0 1.0 10.0
1.0 12.0 1.0 12.0
1.0 18.0 1.0 18.0
1.0 11.0 1.0 11.0
1.5
1.5
1.0
1.0
Unit
ns
ns
ns
ns
CAPACITIVE CHARACTERISTICS
Test Condition
Value
Symbol
Parameter
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
CIN Input Capacitance
4 10
10
10 pF
CI/O
Output
Capacitance
8
pF
CPD Power Dissipation
Capacitance
21
pF
(note 1)
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)
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