IDT54FCT841AT Ver la hoja de datos (PDF) - Integrated Device Technology
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IDT54FCT841AT Datasheet PDF : 7 Pages
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IDT54/74FCT841AT/BT/CT/DT
FAST CMOS BUS INTERFACE LATCHES
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
∆ICC
ICCD
IC
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current(4)
Total Power Supply Current(6)
Test Conditions(1)
VCC = Max.
VIN = 3.4V(3)
VCC = Max.
VIN = VCC
Outputs Open
OE = GND
VIN = GND
LE = VCC
One Input Toggling
50% Duty Cycle
VCC = Max.
VIN = VCC
Min. Typ.(2) Max. Unit
— 0.5 2.0 mA
— 0.15 0.25 mA/
MHz
— 1.5 3.5 mA
Outputs Open
VIN = GND
fi = 10MHz
50% Duty Cycle
OE = GND
VIN = 3.4
VIN = GND
— 1.8 4.5
LE = VCC
One Bit Toggling
VCC = Max.
VIN = VCC
—
3.0 6.0(5)
Outputs Open
fi = 2.5MHz
50% Duty Cycle
OE = GND
LE = VCC
Eight Bits Toggling
VIN = GND
VIN = 3.4
VIN = GND
—
5.0 14.0(5)
NOTES:
1. For conditions shown as Max. or Min., 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 the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
ICC = Quiescent Current
∆ICC = 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 = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
2571 tbl 07
6.22
4
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