74VHC244MTR View Datasheet(PDF) - STMicroelectronics
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74VHC244MTR Datasheet PDF : 12 Pages
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74VHC244
Table 7: AC Electrical Characteristics (Input tr = tf = 3ns)
Test Condition
Value
Symbol
Parameter
VCC CL
(V) (pF)
tPLH
tPHL
tPZL
tPZH
tPLZ
tPHZ
tOSLH
tOSHL
Propagation Delay 3.3(*) 15
Time
3.3(*) 50
5.0(**) 15
5.0(**) 50
Output Enable
Time
3.3(*) 15
3.3(*) 50
5.0(**) 15
5.0(**) 50
Output Disable
Time
3.3(*) 50
5.0(**) 50
Output to Output 3.3(*) 50
Skew time (note 1) 5.0(**) 50
RL = 1KΩ
RL = 1KΩ
RL = 1KΩ
RL = 1KΩ
RL = 1KΩ
RL = 1KΩ
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
5.8 8.4 1.0 10.0 1.0 10.0
8.3 11.9 1.0 13.5 1.0 13.5
ns
3.9 5.5 1.0 6.5 1.0 6.5
5.4 7.5 1.0 8.5 1.0 8.5
6.6 10.6 1.0 12.5 1.0 12.5
9.1 14.1 1.0 16.0 1.0 16.0
ns
4.7 7.3 1.0 8.5 1.0 8.5
6.2 9.3 1.0 10.5 1.0 10.5
10.3 14.0 1.0 16.0 1.0 16.0
ns
6.7 9.2 1.0 10.5 1.0 10.5
1.5
1.5
1.5
ns
1.0
1.0
1.0
(*) 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
Test Condition
Value
Symbol
Parameter
CIN
COUT
CPD
Input Capacitance
Output
Capacitance
Power Dissipation
Capacitance
(note 1)
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
4 10
10
10 pF
6
pF
19
pF
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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