參數(shù)資料
型號: 74ACT257TTR
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): 3/8頁
文件大?。?/td> 58K
代理商: 74ACT257TTR
74ACT10
3/8
DC SPECIFICATIONS
1) Maximum test duration 2ms, one output loaded at time
2) Incident wave switching is guaranteed on trasmission lines with impedances as low as 50
AC ELECTRICAL CHARACTERISTICS
(C
L
= 50 pF, R
L
= 500
, Input t
r
= t
f
= 3ns)
(*) Voltage range is 5.0V
±
0.5V
CAPACITIVE CHARACTERISTICS
1) C
PD
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. I
CC(opr)
=C
PD
x V
CC
x f
IN
+I
CC
/3 (per gate)
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25
°
C
-40 to 85
°
C
-55 to 125
°
C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
V
IH
High Level Input
Voltage
4.5
5.5
4.5
5.5
4.5
5.5
4.5
5.5
4.5
V
O
= 0.1 V or
V
CC
-0.1V
V
O
= 0.1 V or
V
CC
-0.1V
I
O
=-50
μ
A
I
O
=-50
μ
A
I
O
=-24 mA
I
O
=-24 mA
I
O
=50
μ
A
I
O
=50
μ
A
I
O
=24 mA
I
O
=24 mA
2.0
2.0
1.5
1.5
1.5
1.5
4.49
5.49
2.0
2.0
2.0
2.0
V
V
IL
Low Level Input
Voltage
0.8
0.8
0.8
0.8
0.8
0.8
V
V
OH
High Level Output
Voltage
4.4
5.4
3.86
4.86
4.4
5.4
3.76
4.76
4.4
5.4
3.7
4.7
V
V
OL
Low Level Output
Voltage
0.001
0.1
0.1
0.1
5.5
4.5
5.5
0.001
0.1
0.36
0.36
0.1
0.44
0.44
0.1
0.5
0.5
I
I
Input Leakage Cur-
rent
Max I
CC
/Input
Quiescent Supply
Current
5.5
V
I
= V
CC
or GND
±
0.1
±
1
±
1
μ
A
I
CCT
I
CC
5.5
V
I
= V
CC
- 2.1V
0.6
1.5
1.6
mA
5.5
V
I
= V
CC
or GND
4
40
80
μ
A
I
OLD
I
OHD
Dynamic Output
Current (note 1, 2)
5.5
V
OLD
= 1.65 V max
V
OHD
= 3.85 V min
75
-75
50
-50
mA
mA
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25
°
C
-40 to 85
°
C
-55 to 125
°
C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
t
PLH
t
PHL
Propagation Delay
Time
5.0
(*)
1.5
4.5
9.0
1.0
10.0
1.0
10.0
ns
Symbol
Parameter
Test Condition
Value
Unit
V
CC
(V)
T
A
= 25
°
C
-40 to 85
°
C
-55 to 125
°
C
Min.
Typ.
Max.
Min.
Max.
Min.
Max.
C
IN
C
PD
Input Capacitance
5.0
4.0
pF
Power Dissipation
Capacitance (note
1)
5.0
f
IN
= 10MHz
37.0
pF
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