English
Language : 

IDT74FCT245T Datasheet, PDF (4/8 Pages) Integrated Device Technology – FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
◁
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
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 FCTxxxT
Outputs Open
OE = T/R = GND
VIN = GND
FCT2xxxT
One Input Toggling
50% Duty Cycle
VCC = Max.
VIN = VCC FCTxxxT
Min. Typ.(2) Max.
— 0.5 2.0
— 0.15 0.25
— 0.06 0.12
— 1.5 3.5
Unit
mA
mA/
MHz
mA
Outputs Open
fi = 10MHz
50% Duty Cycle
VIN = GND FCT2xxxT — 0.6 2.2
VIN = 3.4 FCTxxxT — 1.8 4.5
OE = T/R = GND
One Bit Toggling
VCC = Max.
VIN = GND FCT2xxxT
VIN = VCC FCTxxxT —
0.9 3.2
3.0 6.0(5)
Outputs Open
VIN = GND FCT2xxxT —
1.2 3.4(5)
fi = 2.5MHz
50% Duty Cycle
VIN = 3.4 FCTxxxT
—
5.0 14.0(5)
OE = T/R = GND
VIN = GND FCT2xxxT —
3.2 11.4(5)
NOTES:
Eight Bits Toggling
2539 tbl 08
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.
6.9
4
 ▷