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IDT74FCT257DTDSOB Datasheet(PDF) 4 Page - Integrated Device Technology |
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IDT74FCT257DTDSOB Datasheet(HTML) 4 Page - Integrated Device Technology |
4 / 7 page 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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