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IDT74FCT257ATDQB Datasheet(PDF) 4 Page - Integrated Device Technology

Part # IDT74FCT257ATDQB
Description  FAST CMOS QUAD 2-INPUT MULTIPLEXER
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

IDT74FCT257ATDQB Datasheet(HTML) 4 Page - Integrated Device Technology

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MILITARYANDINDUSTRIALTEMPERATURERANGES
4
IDT54/74FCT257T/AT/CT/DT
FASTCMOSQUAD2-INPUTMULTIPLEXER
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
∆ICC
Quiescent Power Supply Current
VCC = Max.
0.5
2
mA
TTL Inputs HIGH
VIN = 3.4V(3)
ICCD
Dynamic Power Supply
VCC = Max.
VIN = VCC
0.15
0.25
mA/
Current(4)
Outputs Open
VIN = GND
MHz
OE = GND
One Input Toggling
50% Duty Cycle
IC
Total Power Supply Current(6)
VCC = Max.
VIN = VCC
1.5
3.5
mA
Outputs Open
VIN = GND
fo = 10MHz
50% Duty Cycle
VIN = 3.4V
1.8
4.5
OE = GND
VIN = GND
One Bit Toggling
VCC = Max.
VIN = VCC
1.5
3.5(5)
Outputs Open
VIN = GND
fo = 2.5MHz
50% Duty Cycle
VIN = 3.4V
2.5
7.5(5)
OE = GND
VIN = GND
Four Bits Toggling
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
∆ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC +
∆ICC DHNT + ICCD (fONO)
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)
fO = Output Frequency
NO = Number of Outputs at fO
All currents are in milliamps and all frequencies are in megahertz.
POWER SUPPLY CHARACTERISTICS


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