(Above which the useful life may be impaired. For user
guidelines, not tested.)
Storage Temperature................................. –55°C to +125°C
Ambient Temperature with
Power Applied............................................. –55°C to +125°C
DC Input Voltage ............................................–0.5V to +7.0V
DC Output Voltage..........................................–0.5V to +7.0V
DC Output Current
(Maximum Sink Current/Pin) ........................ –60 to +120 mA
Outputs
Power Dissipation .......................................................... 1.0W
Static Discharge Voltage ........................................... >2001V
(per MIL-STD-883, Method 3015)
Function Table
[2]
Inputs
OE
L
L
H
A
L
H
X
Y
L
H
Z
Ordering Range
Range
Industrial
Ambient
Temperature
– 40°C to +85°C
V
CC
5V
±
10%
Notes:
1. On CY74FCT162H244T these pins have “bus hold.”
2. H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care. Z = High Importance.
3. Operation beyond the limits set forth may impair the useful life of the device. Unless otherwise noted, these limits are over the operating free-air temperature range.
4. Unused inputs must always be connected to an appropriate logic voltage level, preferably either V
CC
or ground.
2
CY74FCT16244T/2244T
CY74FCT16444T/2H244
Electrical Characteristics
Over the Operating Range
Parameter
V
IH
V
IL
V
H
V
IK
I
IH
I
IL
I
BBH
I
BBL
I
BHHO
I
BHLO
I
OZH
I
OZL
I
OS
I
O
I
OFF
Description
Input HIGH Voltage
Input LOW Voltage
Input Hysteresis
[6]
Input Clamp Diode Voltage
Input HIGH Current
Input LOW Current
Standard
Bus Hold
Standard
Bus Hold
Bus Hold Sustain Current on Bus Hold Input
[7]
Bus Hold Overdrive Current on Bus Hold Input
High Impedance Output Current
(Three-State Output pins)
High Impedance Output Current
(Three-State Output pins)
Short Circuit Current
[8]
Output Drive Current
Power-Off Disable
[8]
[7]
Test Conditions
Min.
2.0
Typ.
[5]
Max.
0.8
Unit
V
V
mV
V
µA
µA
µA
µA
100
V
CC
=Min., I
IN
=–18 mA
V
CC
=Max., V
I
=V
CC
V
CC
=Max., V
I
=GND
V
CC
=Min.
V
I
=2.0V
V
I
=0.8V
V
CC
=Max., V
I
=1.5V
V
CC
=Max., V
OUT
=2.7V
V
CC
=Max., V
OUT
=0.5V
V
CC
=Max., V
OUT
=GND
V
CC
=Max., V
OUT
=2.5V
V
CC
=0V, V
OUT
≤4.5V
[9]
–0.7
–1.2
±1
±100
±1
±100
–50
+50
TBD
±1
±1
–80
–50
–140
–200
–180
±1
mA
µA
µA
mA
mA
µA
Output Drive Characteristics for CY74FCT16244T, CY74FCT16444T
Parameter
V
OH
Description
Output HIGH Voltage
Test Conditions
V
CC
=Min., I
OH
=–3 mA
V
CC
=Min., I
OH
=–15 mA
V
CC
=Min., I
OH
=–32 mA
V
OL
Output LOW Voltage
V
CC
=Min., I
OL
=64 mA
Min.
2.5
2.4
2.0
Typ.
[5]
3.5
3.5
3.0
0.2
0.55
Max.
Unit
V
V
V
V
Output Drive Characteristics for CY74FCT162244T, CY74FCT162H244T
Parameter
I
ODL
I
ODH
V
OH
V
OL
Description
Output LOW Current
[8]
Output HIGH Current
[8]
Output HIGH Voltage
Output LOW Voltage
Test Conditions
V
CC
=5V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
V
CC
=5V, V
IN
=V
IH
or V
IL
, V
OUT
=1.5V
V
CC
=Min., I
OH
=–24 mA
V
CC
=Min., I
OL
=24 mA
Min.
60
–60
2.4
Typ.
[5]
115
–115
3.3
0.3
0.55
Max.
150
–150
Unit
mA
mA
V
V
Notes:
5. Typical values are at V
CC
=5.0V, T
A
= +25°C ambient.
6. This parameter is guaranteed but not tested.
7. Pins with bus hold are described in Pin Description.
8. Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus and/or sample
and hold techniques are preferable in order to minimize internal chip heating and more accurately reflect operational values. Otherwise prolonged shorting
of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parametric tests. In any sequence of parameter
tests, I
OS
tests should be performed last.
9. Tested at +25°C.
3
CY74FCT16244T/2244T
CY74FCT16444T/2H244
Capacitance
[6]
(T
A
= +25°C, f = 1.0 MHz)
Parameter
C
IN
C
OUT
Description
Input Capacitance
Output Capacitance
V
IN
= 0V
V
OUT
= 0V
Test Conditions
Typ.
[5]
4.5
5.5
Max.
6.0
8.0
Unit
pF
pF
Power Supply Characteristics
Parameter
I
CC
∆I
CC
I
CCD
Description
Quiescent Power Supply Current V
CC
=Max.
Quiescent Power Supply Current V
CC
=Max.
(TTL inputs HIGH)
Dynamic Power Supply
Current
[11]
Total Power Supply Current
[12]
Test Conditions
V
IN
≤0.2V,
V
IN
≤V
CC
-0.2V
V
IN
=3.4V
[10]
Typ.
[5]
5
0.5
60
Max.
500
1.5
100
Unit
µA
mA
µA/MHz
V
CC
=Max., One Input Toggling, V
IN
=V
CC
or
50% Duty Cycle, Outputs
V
IN
=GND
Open, OE=GND
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
V
IN
=3.4V or
V
IN
=GND
I
C
0.6
0.9
2.4
6.4
1.5
2.3
4.5
[13]
16.5
[13]
mA
mA
mA
mA
V
CC
=Max., f
1
=2.5 MHz, 50% V
IN
=V
CC
or
Duty Cycle, Outputs Open, Six- V
IN
=GND
teen Bits Toggling,
V
IN
=3.4V or
OE=GND
V
IN
=GND
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
= Number of TTL inputs at D
H
N
T
I
CCD
= Dynamic Current caused by an input transition pair (HLH or LHL)
= Clock frequency for registered devices, otherwise zero
f
0
f
1
= Input signal frequency
= Number of inputs changing at f
1
N
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 guaranteed but not tested.
4
CY74FCT16244T/2244T
CY74FCT16444T/2H244
Switching Characteristics
Over the Operating Range
[14]
CY74FCT16244T
CY74FCT162244T
CY74FCT16444T
CY74FCT162H244T
Parameter
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK(O)
Description
Propagation Delay Data to Output
Output Enable Time
Output Disable Time
Output Skew
[16]
Min.
1.5
1.5
1.5
Max.
6.5
8.0
7.0
0.5
CY74FCT16244AT
CY74FCT162244AT
CY74FCT16444AT
CY74FCT162H244AT
Min.
1.5
1.5
1.5
Max.
4.8
6.2
5.6
0.5
Unit
ns
ns
ns
ns
Fig. No.
[15]
1, 3
1, 7, 8
1, 7, 8
—
Switching Characteristics
Over the Operating Range
[14]
(continued)
CY74FCT16244CT
CY74FCT162244CT
CY74FCT16444CT
CY74FCT162H244CT
Parameter
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
SK(O)
Description
Propagation Delay Data to Output
Output Enable Time
Output Disable Time
Output Skew
[16]
Min.
1.5
1.5
1.5
Max.
4.1
5.8
5.2
0.5
CY74FCT16244ET
CY74FCT162244ET
CY74FCT162H244ET
Min.
1.5
1.5
1.5
Max.
3.2
4.4
3.6
0.5
Unit
ns
ns
ns
ns
Fig. No.
[15]
1, 3
1, 7, 8
1, 7, 8
—
Notes:
14. Minimum limits are guaranteed but not tested on Propagation Delays.
15. See “Parameter Measurement Information” in the General Information section.
16. Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
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