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參數(shù)資料
| 型號(hào)： | IDT74FCT257TP |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 通用總線功能 |
| 英文描述： | FAST CMOS QUAD 2-INPUT MULTIPLEXER |
| 中文描述： | FCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 4/7頁 |
| 文件大小： | 73K |
| 代理商： | IDT74FCT257TP |
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
4
IDT54/74FCT257T/AT/CT/DT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
Symbol
I
CC
Parameter
Test Conditions
(1)
Min.
Typ.
(2)
Max.
Unit
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamc Power Supply
Current
(4)
V
CC
= Max.
V
IN
= 3.4V
(3)
V
CC
= Max.
Outputs Open
OE
= GND
One Input Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
fo = 10MHz
50% Duty Cycle
OE
= GND
One Bit Toggling
V
CC
= Max.
Outputs Open
fo = 2.5MHz
50% Duty Cycle
OE
= GND
Four Bits Toggling
—
0.5
2
mA
I
CCD
V
IN
= V
CC
V
IN
= GND
—
0.15
0.25
mA/
MHz
I
C
Total Power Supply Current
(6)
V
IN
= V
CC
V
IN
= GND
—
1.5
3.5
mA
V
IN
= 3.4V
V
IN
= GND
—
1.8
4.5
V
IN
= V
CC
V
IN
= GND
—
1.5
3.5
(5)
V
IN
= 3.4V
V
IN
= GND
—
2.5
7.5
(5)
NOTES:
1. For conditions shown as Mn. or Max., 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
I
CC
formula. These limts 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
= Dynamc Current caused by an Input Transition Pair (HLH or LHL)
f
O
= Output Frequency
N
O
= Number of Outputs at f
O
All currents are in mlliamps and all frequencies are in megahertz.
POWER SUPPLY CHARACTERISTICS
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