74FCT540T Datasheet, PDF (4/6 Pages) Integrated Device Technology – FAST CMOS OCTAL BUFFER/LINE DRIVER

IDT74FCT540AT/CT
FAST CMOS OCTAL BUFFER/LINE DRIVER
INDUSTRIAL TEMPERATURE RANGE
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
VIN = VCC
VIN = GND
One Input Toggling
50% Duty Cycle
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
Four Bits Toggling
VIN = 3.4V
VIN = GND
Min. Typ.⁽²⁾ Max.
Unit
—
0.5
2
mA
—
0.15
0.25
mA/
MHz
—
1.5
3.5
mA
—
1.8
4.5
—
3
6⁽⁵⁾
mA
—
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 (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 fO
All currents are in milliamps and all frequencies are in megahertz.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
Symbol Parameter
Condition⁽¹⁾
tPLH
Propagation Delay
CL = 50pF
tPHL
Dx to Ox
tPZH
Output Enable Time
RL = 500Ω
tPZL
tPHZ
Output Disable Time
tPLZ
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
FCT540AT
Min.⁽²⁾
Max.
1.5
4.8
1.5
6.2
1.5
5.6
FCT540CT
Min.⁽²⁾
Max.
Unit
1.5
4.3
ns
1.5
5.8
ns
1.5
5.2
ns
4