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參數(shù)資料
| 型號(hào)： | IDT74FCT2157TQB |
| 廠商： | Integrated Device Technology, Inc. |
| 英文描述： | FAST CMOS QUAD 2-INPUT MULTIPLEXER |
| 中文描述： | 快速CMOS四路2輸入多路復(fù)用器 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大?。?/td> | 135K |
| 代理商： | IDT74FCT2157TQB |
6.6
4
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
I
CC
Parameter
Test Conditions
(1)
Min.
—
Typ.
(2)
0.5
Max.
2.0
Unit
mA
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current
(4)
V
CC
= Max.
V
IN
= 3.4
(3)
V
CC
= Max.
Outputs Open
E
or
OE
= GND
One Bit Toggling
50% Duty Cycle
V
CC
= Max.
I
CCD
V
IN
= V
CC
V
IN
= GND
FCTxxxT
—
0.15
0.25
mA/
MHz
FCT2xxxT
—
0.06
0.12
I
C
Total Power Supply Current
(6)
V
IN
= V
CC
FCTxxxT
—
1.5
3.5
mA
Outputs Open
f
O
= 10MHz
50% Duty Cycle
E
or
OE
= GND
V
IN
= GND
FCT2xxxT
—
0.6
2.2
V
IN
= 3.4
FCTxxxT
—
1.8
4.5
One Bit Toggling
V
CC
= Max.
Outputs Open
f
O
= 2.5MHz
V
IN
= GND
V
IN
= V
CC
V
IN
= GND
FCT2xxxT
FCTxxxT
FCT2xxxT
0.9
1.5
0.6
3.2
3.5
(5)
2.2
(5)
—
50% Duty Cycle
E
or
OE
= GND
Four Bits Toggling
V
IN
= 3.4
FCTxxxT
2.5
7.5
(5)
V
IN
= GND
FCT2xxxT
1.6
6.2
(5)
NOTES:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, +25
°
C ambient.
3. Per TTL driven input (V
IN
= 3.4V); all other inputs at V
CC
or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
5. Values for these conditions are examples of the I
CC
formula. These limits are guaranteed but not tested.
6. I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
I
CC
D
H
N
T
+ I
CCD
(f
o
N
o
)
I
CC
= Quiescent Current
I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Output Transition Pair (HLH or LHL)
f
o
= Output Frequency
N
o
= Number of Outputs at f
o
All currents are in milliamps and all frequencies are in megahertz.
2537 tbl 06
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