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74LVX257TTR 数据表(PDF) 4 Page - STMicroelectronics

部件名 74LVX257TTR
功能描述  LOW VOLTAGE CMOS QUAD 2 CHANNEL MULTIPLEXER (3-STATE) WITH 5V TOLERANT INPUTS
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

74LVX257TTR 数据表(HTML) 4 Page - STMicroelectronics

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74LVX257
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DYNAMIC SWITCHING CHARACTERISTICS
1) Worst case package.
2) Max number of outputs defined as (n). Data inputs are driven 0V to 3.3V, (n-1) outputs switching and one output at GND.
3) Max number of data inputs (n) switching. (n-1) switching 0V to 3.3V. Inputs under test switching: 3.3V to threshold (VILD), 0V to threshold
(VIHD), f=1MHz.
AC ELECTRICAL CHARACTERISTICS (Input tr = tf = 3ns)
1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch-
ing in the same direction, either HIGH or LOW
2) Parameter guaranteed by design
(*) Voltage range is 3.3V
± 0.3V
Symbol
Parameter
Test Condition
Value
Unit
VCC
(V)
TA = 25°C
-40 to 85°C
-55 to 125°C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
VOLP
Dynamic Low
Voltage Quiet
Output (note 1, 2)
3.3
CL = 50 pF
0.3
0.5
V
VOLV
-0.5
-0.3
VIHD
Dynamic High
Voltage Input
(note 1, 3)
3.3
2.0
VILD
Dynamic Low
Voltage Input
(note 1, 3)
3.3
0.8
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
A, B, to Y
2.7
15
7.0
13.0
1.0
15.4
1.0
16.4
ns
2.7
50
9.5
18.0
1.0
20.3
1.0
21.3
3.3(*)
15
5.8
9.3
1.0
11.0
1.0
12.0
3.3(*)
50
8.3
12.8
1.0
14.5
1.0
15.5
tPLH
tPHL
Propagation Delay
Time
SELECT to Y
2.7
15
8.5
15.4
1.0
18.2
1.0
20.0
ns
2.7
50
10.5
20.3
1.0
23.1
1.0
24.5
3.3(*)
15
7.0
11.0
1.0
13.0
1.0
14.0
3.3(*)
50
9.5
14.5
1.0
16.5
1.0
18.0
tPZL
tPZH
Output Enable
Time
2.7
15
8.0
14.7
1.0
17.5
1.0
18.5
ns
2.7
50
10.5
19.6
1.0
22.4
1.0
24.0
3.3(*)
15
6.7
10.5
1.0
12.5
1.0
13.5
3.3(*)
50
9.2
14.0
1.0
16.0
1.0
17.0
tPLZ
tPHZ
Output Disable
Time
2.7
50
9.5
16.8
1.0
18.9
1.0
20.0
ns
3.3(*)
50
8.6
12.0
1.0
13.5
1.0
15.0
tOSLH
tOSHL
Output to Output
Skew Time (note
1,2)
2.7
50
0.5
1.0
1.5
1.5
ns
3.3(*)
50
0.5
1.0
1.5
1.5


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