![](http://datasheet.mmic.net.cn/330000/IDT54FCT841BTPB_datasheet_16403404/IDT54FCT841BTPB_4.png)
6.22
4
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT841AT/BT/CT/DT
FAST CMOS BUS INTERFACE LATCHES
POWER SUPPLY CHARACTERISTICS
Symbol
I
CC
Parameter
Test Conditions
(1)
Min.
—
Typ.
(2)
0.5
Max.
2.0
Unit
mA
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current
(4)
V
CC
= Max.
V
IN
= 3.4V
(3)
V
CC
= Max.
Outputs Open
OE
= GND
LE = V
CC
One Input Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
OE
=
GND
LE = V
CC
One Bit Toggling
V
CC
= Max.
Outputs Open
fi = 2.5MHz
50% Duty Cycle
OE
=
GND
LE = V
CC
Eight Bits Toggling
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
= 3.4
V
IN
= GND
—
1.8
4.5
V
IN
= V
CC
V
IN
= GND
—
3.0
6.0
(5)
V
IN
= 3.4
V
IN
= GND
—
5.0
14.0
(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
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 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.
2571 tbl 07