6.11
4
IDT54/74FCT299T/AT/CT
FAST CMOS 8-INPUT UNIVERSAL SHIFT REGISTER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
I
CC
Quiescent Power Supply
Current TTL Inputs HIGH
Test Conditions
(1)
Min.
—
Typ.
(2)
0.5
Max.
2.0
Unit
mA
Vcc = Max.
V
IN
= 3.4V
(3)
I
CCD
Dynamic Power Supply
Current
(4)
Vcc = Max.
Outputs Open
OE
1
=
OE
2
= GND
MR
= V
CC
S
0
= S
1
= V
CC
DS
0
= DS
1
= GND
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)
Vcc = Max.
Outputs Open
f
CP
= 10MHz
50% Duty Cycle
OE
1
=
OE
2
= GND
MR
= V
CC
S
0
= S
1
= V
CC
DS
0
= DS
7
= GND
One Bit Toggling
at f
i
= 5MHz
50% Duty Cycle
V
IN
= V
CC
V
IN
= GND
—
1.5
3.5
mA
V
IN
= 3.4V
V
IN
= GND
—
2.0
5.5
Vcc = Max.
Outputs Open
f
CP
= 10MHz
50% Duty Cycle
OE
1
=
OE
2
= GND
MR
= V
CC
S
0
= S
1
= V
CC
DS
0
= DS
7
= GND
Eight Bits Toggling
at f
i
= 2.5MHz
50% Duty Cycle
V
IN
= V
CC
V
IN
= GND
—
3.8
7.3
(5)
V
IN
= 3.4V
V
IN
= GND
—
6.0
16.3
(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.
2632 tbl 06