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參數(shù)資料
| 型號： | 74FCT245 |
| 廠商： | Integrated Device Technology, Inc. |
| 英文描述： | FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS |
| 中文描述： | 快速CMOS八路雙向收發(fā)器 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 91K |
| 代理商： | 74FCT245 |
CY54/74FCT245T
3
Power Supply Characteristics
Parameter
I
CC
I
CC
Description
Test Conditions
Typ.
[5]
0.1
0.5
Max.
0.2
2.0
Unit
mA
mA
Quiescent Power Supply Current
Quiescent Power Supply Current
(TTL inputs HIGH)
Dynamic Power Supply Current
[9]
V
CC
=Max., V
IN
≤
0.2V, V
IN
≥
V
CC
0.2V
V
CC
=Max., V
IN
=3.4V,
[8]
f
1
=0, Outputs Open
V
CC
=Max., One Input Toggling,
50% Duty Cycle, Outputs Open,
T/R or OE=GND and
V
IN
≤
0.2V or V
IN
≥
V
CC
0.2V
V
CC
=Max.,50%DutyCycle,OutputsOpen,
One Bit Toggling at f
1
=10 MHz,
T/R or OE=GND and
V
IN
≤
0.2V or V
IN
≥
V
CC
0.2V
V
CC
=Max.,50%DutyCycle,OutputsOpen,
One Bit Toggling at f
1
=10 MHz,
T/R or OE=GND and V
IN
=3.4V or V
IN
=GND
V
CC
=Max.,50%DutyCycle,OutputsOpen,
Eight Bits Toggling at f
1
=2.5 MHz,
T/R or OE=GND and
V
IN
≤
0.2V or V
IN
≥
V
CC
0.2V
V
CC
=Max.,50%DutyCycle,OutputsOpen,
Eight Bits Toggling at f
1
=2.5 MHz,
T/R or OE=GND and V
IN
=3.4V or V
IN
=GND
I
CCD
0.06
0.12
mA/MHz
I
C
Total Power Supply Current
[10]
0.7
1.4
mA
1.2
3.4
mA
1.3
2.6
[11]
mA
3.3
10.6
[11]
mA
Notes:
8.
9.
10. I
C
Per TTL driven input (V
=3.4V); all other inputs at V
or GND.
This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
= I
QUIESCENT
+ I
INPUTS
+ I
I
C
= I
D
N
(f
/2 + f
N
)
I
CC
= Quiescent Current with CMOS input levels
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
I
CCD
= Dynamic Current caused by an input transition pair (HLH or LHL)
f
0
= Clock frequency for registered devices, otherwise zero
f
1
= Input signal frequency
N
= Number of inputs changing at f
All currents are in milliamps and all frequencies are in megahertz.
11. Values for these conditions are examples of the I
CC
formula. These limits are specified but not tested.
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|---|---|
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