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74VHCT257A Datasheet(PDF) 4 Page - STMicroelectronics

Part No. 74VHCT257A
Description  QUAD 2 CHANNEL MULTIPLEXER 3-STATE
Download  10 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

74VHCT257A Datasheet(HTML) 4 Page - STMicroelectronics

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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
4.5 to 5.5
2
2
V
VIL
Low Level Input
Voltage
4.5 to 5.5
0.8
0.8
V
VOH
High Level Output
Voltage
4.5
IO=-50
µA
4.4
4.5
4.4
V
4.5
IO=-8 mA
3.94
3.8
VOL
Low Level Output
Voltage
4.5
IO=50
µA
0.0
0.1
0.1
V
4.5
IO=8 mA
0.36
0.44
IOZ
High Impedance
Output Leakage
Current
4.5 to 5.5
VI =VIH or VIL
VO = 0V to 5.5V
±0.25
±2.5
µA
II
Input Leakage Current
0 to 5.5
VI = 5.5V or GND
±0.1
±1.0
µA
ICC
Quiescent Supply
Current
5.5
VI =VCC or GND
4
40
µA
∆ICC
Additional Worst Case
Supply Current
5.5
One Input at 3.4V,
other input at VCC or
GND
1.35
1.5
mA
IOPD
Output Leakage
Current
0VOUT = 5.5V
0.5
5.0
µA
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 A, B to Y
5.0
(*)
15
5.8
9.3
1.0
11.0
ns
5.0
(*)
50
8.3
12.8
1.0
14.5
tPLH
tPHL
Propagation Delay
Time SELECT to Y
5.0
(*)
15
7.0
11.0
1.0
13.0
ns
5.0
(*)
50
9.5
14.5
1.0
16.5
tPZL
tPZH
Output Enable Time
5.0
(*)
15
6.7
10.5
1.0
12.5
ns
5.0
(*)
50
9.2
14.0
1.0
16.0
tPLZ
tPHZ
Output Disable Time
5.0
(*)
50
8.6
12.0
1.0
13.5
ns
(*) Voltage range is 5V
± 0.5V
74VHCT257A
4/9


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