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CY54FCT240TQSOP Datasheet(PDF) 3 Page - Texas Instruments |
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CY54FCT240TQSOP Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 8 page  CY54/74FCT240T CY54/74FCT244T 3 ] Capacitance[6] Parameter Description Typ.[5] Max. Unit CIN Input Capacitance 5 10 pF COUT Output Capacitance 9 12 pF Power Supply Characteristics Parameter Description Test Conditions Typ.[5] Max. Unit ICC Quiescent Power Supply Current VCC=Max., VIN≤0.2V, VIN≥VCC–0.2V 0.1 0.2 mA ∆I CC Quiescent Power Supply Current (TTL inputs) VCC=Max., VIN=3.4V, [8] f1=0, Outputs Open 0.5 2.0 mA ICCD Dynamic Power Supply Current[9] VCC=Max., One Input Toggling, 50% Duty Cycle, Outputs Open, OE1=OE2=GND, VIN≤0.2V or VIN≥VCC–0.2V 0.06 0.12 mA/MHz IC Total Power Supply Current[10] VCC=Max., 50% Duty Cycle, Outputs Open, One Bit Toggling at f1=10 MHz, OE1=OE2=GND, VIN≤0.2V or VIN≥VCC–0.2V 0.7 1.4 mA VCC=Max., 50% Duty Cycle, Outputs Open, One Bit Toggling at f1=10 MHz, OE1=OE2=GND, VIN=3.4V or VIN=GND 1.0 2.4 mA VCC=Max., 50% Duty Cycle, Outputs Open, Eight Bits Toggling at f1=2.5 MHz, OE1=OE2=GND, VIN≤0.2V or VIN≥VCC–0.2V 1.3 2.6[11] mA VCC=Max., 50% Duty Cycle, Outputs Open, Eight Bits Toggling at f1=2.5 MHz, OE1=OE2=GND, VIN=3.4V or VIN=GND 3.3 10.6[11] mA Notes: 8. Per TTL driven input (VIN=3.4V); all other inputs at VCC or GND. 9. This parameter is not directly testable, but is derived for use in Total Power Supply calculations. 10. IC =IQUIESCENT + IINPUTS + IDYNAMIC IC =ICC+∆ICCDHNT+ICCD(f0/2 + f1N1) ICC = Quiescent Current with CMOS input levels ∆I CC = 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) f0 = Clock frequency for registered devices, otherwise zero f1 = Input signal frequency N1 = Number of inputs changing at f1 All currents are in milliamps and all frequencies are in megahertz. 11. Values for these conditions are examples of the ICC formula. These limits are specified but not tested. |
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