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参数资料
| 型号： | PI74FCT640T |
| 厂商： | Pericom Semiconductor Corp. |
| 英文描述： | Fast CMOS Octal Bidirectional Transceivers |
| 中文描述： | 快速CMOS八路双向收发器 |
| 文件页数： | 3/4页 |
| 文件大小： | 248K |
| 代理商： | PI74FCT640T |
3
PS2012B 09/22/99
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PI74FCT245T/640T/645T
25 Ohm Series PI74FCT2245T/2640T/2645T
Octal BidirectionalTransceivers
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
2.0
mA
I
CCD
Supply Current per
Input per MHz
(4)
V
CC
= Max.,
Outputs Open
OE = GND
T/R = GND or V
CC
One Input 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
T/R = OE = GND
One Bit Toggling
V
CC
= Max.,
Outputs Open
f
I
= 2.5 MH
Z
50% Duty Cycle
T/R = OE = GND
Eight 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
3.0
6.0
(5)
V
IN
= 3.4V
V
IN
= GND
5.0
14.0
(5)
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
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 Icc formula. These limits are guaranteed but not tested.
6. I
C
=I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+ DI
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.
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