參數(shù)資料
型號(hào)： IDT74FCT646TPB
廠商： Integrated Device Technology, Inc.
英文描述： FAST CMOS OCTAL TRANSCEIVER/ REGISTERS (3-STATE)
中文描述： 快速CMOS八端口收發(fā)器/寄存器（3態(tài)）
文件頁(yè)數(shù)： 5/8頁(yè)
文件大?。?/td> 91K
代理商： IDT74FCT646TPB
IDT54/74FCT646/A/C
FAST CMOS OCTAL TRANSCEIVER/REGISTER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
7.18
5
POWER SUPPLY CHARACTERISTICS
V
LC
= 0.2V; V
HC
= V
CC
– 0.2V
Symbol
Parameter
I
CC
Quiescent Power Supply Current
Test Conditions
(1)
Min.
—
Typ.
(2)
0.2
Max.
1.5
Unit
mA
V
CC
= Max.
V
IN
≥
V
HC
; V
IN
≤
V
LC
V
CC
= Max.
V
IN
= 3.4V
(3)
V
CC
= Max.
Outputs Open
G
= DIR = GND
One Input Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
f
CP
= 10MHz
50% Duty Cycle
G
= DIR = GND
One Bit Toggling
at fi = 5MHz
50% Duty Cycle
V
CC
= Max.
Outputs Open
f
CP
= 10MHz
50% Duty Cycle
G
= DIR = GND
Eight Bits Toggling
at f
i
= 5MHz
50% Duty Cycle
I
CC
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current
(4)
—
0.5
2.0
mA
I
CCD
V
IN
≥
V
HC
V
IN
≤
V
LC
—
0.15
0.25
mA/MHz
I
C
Total Power Supply Current
(6)
V
IN
≥
V
HC
V
IN
≤
V
LC
(FCT)
—
1.7
4.0
mA
V
IN
= 3.4V
V
IN
= GND
—
2.2
6.0
V
IN
≥
V
HC
V
IN
≤
V
LC
(FCT)
—
7.0
12.8
(5)
V
IN
= 3.4V
V
IN
= GND
—
9.2
21.8
(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
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 Output 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.
2536 tbl 06
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