
CY54/74FCT646T
4
Power Supply Characteristics
Parameter
I
CC
I
CC
Description
Test Conditions
Typ.
[7]
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
[11]
V
CC
=Max., V
IN
≤
0.2V, V
IN
≥
V
CC
–0.2V
V
CC
=Max., V
IN
=3.4V, f
1
=0, Outputs Open
[10]
I
CCD
V
CC
=Max., One Input Toggling,
50% Duty Cycle, Outputs Open,
G=DIR=GND, GAB=GBA=GND,
V
IN
≤
0.2V or V
IN
≥
V
CC
–0.2V
V
CC
=Max., f
0
=10 MHz,
50% Duty Cycle, Outputs Open,
One Bit Toggling at f
1
=5 MHz,
G=DIR=GND, GAB=GBA=GND,
V
IN
≤
0.2V or V
IN
≥
V
CC
–0.2V
V
CC
=Max., f
0
=10 MHz,
50% Duty Cycle, Outputs Open,
One Bit Toggling at f
1
=5 MHz,
G=DIR=GND, GAB=GBA=GND,
V
IN
=3.4V or V
IN
=GND
V
CC
=Max., f
0
=10 MHz,
50% Duty Cycle, Outputs Open,
Eight Bits Toggling at f
1
=5 MHz,
G=DIR=GND, GAB=GBA=GND,
V
IN
≤
0.2V or V
IN
≥
V
CC
–0.2V
V
CC
=Max., f
0
=10 MHz,
50% Duty Cycle, Outputs Open,
Eight Bits Toggling at f
1
=5 MHz,
G=DIR=GND, GAB=GBA=GND,
V
IN
=3.4V or V
IN
=GND
0.06
0.12
mA/MHz
I
C
Total Power Supply Current
[12]
0.7
1.4
mA
1.2
3.4
mA
2.8
5.6
[13]
mA
5.1
14.6
[13]
mA
Notes:
10. Per TTL driven input (V
=3.4V); all other inputs at V
or GND.
11. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
12. I
C
= 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.
13. Values for these conditions are examples of the I
CC
formula. These limits are specified but not tested.