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參數(shù)資料
| 型號(hào)： | PI74FCT257T |
| 廠商： | Pericom Semiconductor Corp. |
| 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(yè)數(shù)： | 4/5頁(yè) |
| 文件大?。?/td> | 50K |
| 代理商： | PI74FCT257T |
4
PS2010A 03/09/96
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PI74FCT157T/257T
(25
Series)PI74FCT2157T/2257T
QUAD 2-INPUT MULTIPLEXER
Notes:
1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V); all other inputs at Vcc 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 Icc 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
CP
/2 + f
I
N
I
)
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 Input Transition Pair (HLH or LHL)
f
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
I
= Input Frequency
N
I
= Number of Inputs at f
I
All currents are in milliamps and all frequencies are in megahertz.
Power Supply Characteristics
Parameters Description
Test Conditions
(1)
Min.
Typ
(2)
Max.
Units
I
CC
Quiescent Power
Supply Current
V
CC
= Max.
V
IN
= GND or V
CC
0.1
500
μA
I
CC
Supply Current per
Input @ TTL HIGH
V
CC
= Max.
V
IN
= 3.4V
(3)
0.5
2.5
mA
I
CCD
Supply Current per
Input per MHz
(4)
V
CC
= Max.,
Outputs Open
E or OE = GND
One Bit Toggling
50% Duty Cycle
V
IN
= V
CC
V
IN
= GND
0.15
0.25
mA/
MHz
I
C
Total Power Supply
Current
(6)
V
CC
= Max.,
Outputs Open
f
I
= 10 MH
Z
50% Duty Cycle
E or OE = GND
One Bit Toggling
V
CC
= Max.,
Outputs Open
f
I
= 2.5 MH
Z
50% Duty Cycle
E or OE = GND
Four Bits Toggling
V
IN
= V
CC
V
IN
= GND
1.5
3.5
(5)
mA
V
IN
= 3.4V
V
IN
= GND
1.8
4.5
(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)
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