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參數(shù)資料
| 型號(hào)： | 74LCX257T |
| 英文描述： | 2-Input Digital Multiplexer |
| 中文描述： | 2，輸入數(shù)字復(fù)接器 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大?。?/td> | 88K |
| 代理商： | 74LCX257T |
www.fairchildsemi.com
2
7
Absolute Maximum Ratings
(Note 1)
Recommended Operating Conditions
(Note 3)
Note 1:
The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated
at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the Absolute Maximum Ratings. The
“
Recom-
mended Operating Conditions
”
table will define the conditions for actual device operation.
Note 2:
I
O
Absolute Maximum Rating must be observed.
Note 3:
Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Symbol
V
CC
V
I
V
O
I
IK
I
OK
Parameter
Value
Conditions
Units
V
V
V
mA
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
0.5 to
+
7.0
0.5 to
+
7.0
0.5 to V
CC
+
0.5
50
50
+
50
±
50
±
100
±
100
65 to
+
150
Output in HIGH or LOW State (Note 2)
V
I
<
GND
V
O
<
GND
V
O
>
V
CC
mA
I
O
I
CC
I
GND
T
STG
DC Output Source/Sink Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
mA
mA
mA
°
C
Symbol
V
CC
Parameter
Min
2.0
1.5
0
0
Max
3.6
3.6
5.5
V
CC
±
24
±
12
±
8
85
10
Units
Supply Voltage
Operating
V
Data Retention
V
I
V
O
I
OH
/I
OL
Input Voltage
Output Voltage
Output Current
V
V
HIGH or LOW State
V
CC
=
3.0V
3.6V
V
CC
=
2.7V - 3.0V
V
CC
=
2.3V - 2.7V
mA
T
A
t/
V
Free-Air Operating Temperature
Input Edge Rate, V
IN
=
0.8V
–
2.0V, V
CC
=
3.0V
40
0
°
C
ns/V
Symbol
Parameter
Conditions
V
CC
(V)
T
A
=
40
°
C to
+
85
°
C
Min
1.7
2.0
Units
Max
V
IH
HIGH Level Input Voltage
2.3
2.7
2.7
3.6
2.3
2.7
2.7
3.6
2.3
3.6
2.3
2.7
3.0
V
V
IL
LOW Level Input Voltage
0.7
0.8
V
V
OH
HIGH Level Output Voltage
I
OH
=
100
μ
A
I
OH
=
8 mA
I
OH
=
12 mA
I
OH
=
18 mA
I
OH
=
24 mA
I
OL
=
100
μ
A
I
OL
=
8mA
I
OL
=
12 mA
I
OL
=
16 mA
I
OL
=
24 mA
0
≤
V
I
≤
5.5V
V
I
or V
O
=
5.5V
V
I
=
V
CC
or GND
3.6V
≤
V
I
≤
5.5V
V
IH
=
V
CC
0.6V
V
CC
0.2
1.8
2.2
2.4
V
3.0
2.2
V
OL
LOW Level Output Voltage
2.3
3.6
2.3
0.2
0.6
V
2.7
3.0
3.0
0.4
0.4
0.55
±
5.0
10
10
±
10
500
I
I
I
OFF
I
CC
Input Leakage Current
Power-Off Leakage Current
Quiescent Supply Current
2.3
3.6
0
2.3
3.6
2.3
3.6
2.3
3.6
μ
A
μ
A
μ
A
I
CC
Increase in I
CC
per Input
μ
A
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