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74VHC244 Datasheet(PDF) 3 Page - STMicroelectronics

Part # 74VHC244
Description  OCTAL BUS BUFFER WITH 3 STATE OUTPUTS NON INVERTED
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74VHC244 Datasheet(HTML) 3 Page - STMicroelectronics

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AC ELECTRICAL CHARACTERISTICS (Input tr =tf =3 ns)
Symb ol
Parameter
Test Co nditi on
Val ue
Un it
VCC
(V)
CL
(pF )
TA =25
oC
-40 to 85
oC
Min.
Typ .
Max.
Min .
Max.
tPLH
tPHL
Propagation Delay
Time
3.3
(*)
15
5.8
8.4
1.0
10.0
ns
3.3
(*)
50
8.3
11.9
1.0
13.5
5.0
(**)
15
3.9
5.5
1.0
6.5
5.0
(**)
50
5.4
7.5
1.0
8.5
tPZL
tPZH
Output Enable Time
3.3
(*)
15
RL =1K
6.6
10.6
1.0
12.5
ns
3.3
(*)
50
RL =1K
9.1
14.1
1.0
16.0
5.0
(**)
15
RL=1K
4.7
7.3
1.0
8.5
5.0
(**)
50
RL=1K
6.2
9.3
1.0
10.5
tPLZ
tPHZ
Output Disable Time
3.3
(*)
50
RL =1K
10.3
14.0
1.0
16.0
ns
5.0
(**)
50
RL =1K
6.7
9.2
1.0
10.5
tOSLH
tOSHL
Output to Output Skew
Time (note 1)
3.3
(*)
50
1.5
1.5
ns
5.0
(**)
50
1.0
1.0
(*) Voltage range is 3.3V
± 0.3V
(**) Voltage range is 5V
± 0.5V
Note 1: Parameter guaranteed by design. tsoLH =|tpLHm-tpLHn|, tsoHL =|tpHLm -tpHLn|
DC SPECIFICATIONS
Symb ol
Parameter
T est Cond ition s
Val ue
Un it
VCC
(V)
TA =25
oC
-40 to 85
oC
Min.
Typ .
Max.
Min .
Max.
VIH
High Level Input
Voltage
2.0
1.5
1.5
V
3.0 to 5.5
0.7VCC
0.7VCC
VIL
Low Level Input
Voltage
2.0
0.5
0.5
V
3.0 to 5.5
0.3VCC
0.3VCC
VOH
High Level Output
Voltage
2.0
IO=-50
µA1.9
2.0
1.9
V
3.0
IO=-50
µA2.9
3.0
2.9
4.5
IO=-50
µA4.4
4.5
4.4
3.0
IO=-4 mA
2.58
2.48
4.5
IO=-8 mA
3.94
3.8
VOL
Low Level Output
Voltage
2.0
IO=50
µA
0.0
0.1
0.1
V
3.0
IO=50
µA
0.0
0.1
0.1
4.5
IO=50
µA
0.0
0.1
0.1
3.0
IO=4 mA
0.36
0.44
4.5
IO=8 mA
0.36
0.44
IOZ
High Impedance
Output Leakage
Current
5.5
VI =VIH orVIL
VO =VCC orGND
±0.25
±2.5
µA
II
Input Leakage Current
0 to 5.5
VI =5.5Vor GND
±0.1
±1.0
µA
ICC
Quiescent Supply
Current
5.5
VI =VCC orGND
4
40
µA
74VHC244
3/8


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