Datasheet

CY74FCT16244T
CY74FCT162244T
CY74FCT162H244T
4
Capacitance
[6]
(T
A
= +25˚C, f = 1.0 MHz)
Parameter Description Test Conditions Typ.
[5]
Max. Unit
C
IN
Input Capacitance V
IN
= 0V 4.5 6.0 pF
C
OUT
Output Capacitance V
OUT
= 0V 5.5 8.0 pF
Power Supply Characteristics
Parameter Description Test Conditions Typ.
[5]
Max. Unit
I
CC
Quiescent Power Supply Current V
CC
=Max. V
IN
≤0.2V,
V
IN
≤V
CC
-0.2V
5 500 µA
∆I
CC
Quiescent Power Supply Current
(TTL inputs HIGH)
V
CC
=Max. V
IN
=3.4V
[10]
0.5 1.5 mA
I
CCD
Dynamic Power Supply
Current
[11]
V
CC
=Max.,One Input Toggling,
50% Duty Cycle, Outputs
Open,
OE=GND
V
IN
=V
CC
or
V
IN
=GND
60 100 µA/MHz
I
C
Total Power Supply Current
[12]
V
CC
=Max., f
1
=10 MHz,
50% Duty Cycle, Outputs
Open, One Bit Toggling,
OE=GND
V
IN
=V
CC
or
V
IN
=GND
0.6 1.5 mA
V
IN
=3.4V or
V
IN
=GND
0.9 2.3 mA
V
CC
=Max., f
1
=2.5 MHz, 50%
Duty Cycle, Outputs Open, Six-
teen Bits Toggling,
OE=GND
V
IN
=V
CC
or
V
IN
=GND
2.4 4.5
[13]
mA
V
IN
=3.4V or
V
IN
=GND
6.4 16.5
[13]
mA
Notes:
10. Per TTL driven input (V
IN
= 3.4V); all other inputs at V
CC
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
DYNAMIC
I
C
=I
CC
+∆I
CC
D
H
N
T
+I
CCD
(f
0
/2 + f
1
N
1
)
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
H
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
1
= Number of inputs changing at f
1
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.