74FCT244T Datasheet, PDF (4/6 Pages) List of Unclassifed Manufacturers – FAST CMOS OCTAL BUFFER/LINE DRIVER

IDT54/74FCT244T/AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
MILITARY AND INDUSTRIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
ΔICC
ICCD
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply
Current⁽⁴⁾
IC
Total Power Supply Current⁽⁶⁾
Test Conditions⁽¹⁾
VCC = Max.
VIN = 3.4V⁽³⁾
VCC = Max.
Outputs Open
OEA = OEB = GND
One Input Toggling
50% Duty Cycle
VIN = VCC
VIN = GND
VCC = Max.
Outputs Open
fi = 10MHz
VIN = VCC
VIN = GND
50% Duty Cycle
OEA = OEB = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
VCC = Max.
Outputs Open
fi = 2.5MHz
VIN = VCC
VIN = GND
50% Duty Cycle
OEA = OEB = GND
Eight Bits Toggling
VIN = 3.4V
VIN = GND
Min. Typ.⁽²⁾ Max.
—
0.5
2
—
0.15
0.25
—
1.5
3.5
—
1.8
4.5
—
3
6⁽⁵⁾
—
5
14⁽⁵⁾
NOTES:
1. For conditions shown as Min. or Max., use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, +25°C ambient.
3. Per TTL driven input; (VIN = 3.4V). All other inputs at VCC 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 ΔICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ΔICC DHNT + ICCD (fCP/2+ fiNi)
ICC = Quiescent Current
ΔICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current caused by an Input Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fi = Output Frequency
Ni = Number of Outputs at fi
All currents are in milliamps and all frequencies are in megahertz.
Unit
mA
mA/
MHz
mA
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
Dx to Ox
Output Enable Time
Output Disable Time
Condition⁽¹⁾
CL = 50pF
RL = 500Ω
54FCT244T
Mil.
Min.⁽²⁾ Max.
1.5 7
1.5 8.5
54/74FCT244AT
Ind.
Mil.
Min.⁽²⁾ Max. Min.⁽²⁾ Max.
1.5 4.8 1.5 5.1
1.5 6.2 1.5 6.5
54/74FCT244CT
Ind.
Mil.
Min.⁽²⁾ Max. Min.⁽²⁾ Max. Unit
1.5 4.1 1.5 4.6 ns
1.5 5.8 1.5 6.5 ns
1.5 7.5 1.5 5.6 1.5 5.9 1.5 5.2 1.5 5.7 ns
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
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