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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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74HC51 датащи(PDF) 4 Page - STMicroelectronics |
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74HC51 датащи(HTML) 4 Page - STMicroelectronics |
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4 / 9 page  M74HC51 4/9 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr =tf = 6ns) CAPACITIVE CHARACTERISTICS 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) =CPD xVCC xfIN +ICC TEST CIRCUIT CL = 50pF or equivalent (includes jig and probe capacitance) RT =ZOUT of pulse generator (typically 50Ω) Symbol Parameter Test Condition Value Unit VCC (V) TA =25°C -40 to 85 °C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. tTLH tTHL Output Transition Time 2.0 30 75 95 110 ns 4.5 8 151922 6.0 7 131619 tPLH tPHL Propagation Delay Time 2.0 39 100 125 150 ns 4.5 13 20 25 30 6.0 11 17 21 26 Symbol Parameter Test Condition Value Unit VCC (V) TA =25°C -40 to 85 °C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. CIN Input Capacitance 5.0 5 101010 pF CPD Power Dissipation Capacitance (note 1) 5.0 32 pF |
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