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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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74LVC373A датащи(PDF) 5 Page - STMicroelectronics |
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74LVC373A датащи(HTML) 5 Page - STMicroelectronics |
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5 / 13 page  74LVC373A 5/13 Table 9: 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 x VCC x fIN + ICC/n (per circuit) Figure 3: Test Circuit RT = ZOUT of pulse generator (typically 50Ω) Table 10: Test Circuit And Waveform Symbol Value Symbol Parameter Test Condition Value Unit VCC (V) TA = 25 °C Min. Typ. Max. CIN Input Capacitance 4pF CPD Power Dissipation Capacitance (note 1) 1.8 fIN = 10MHz 28 pF 2.5 30 3.3 34 Symbol VCC 1.65 to 1.95V 2.3 to 2.7V 2.7V 3.0 to 3.6V CL 30pF 30pF 50pF 50pF RL = R1 1000 Ω 500 Ω 500 Ω 500 Ω VS 2 x VCC 2 x VCC 6V 7V VIH VCC VCC 2.7V 3.0V VM VCC/2 VCC/2 1.5V 1.5V VOH VCC VCC 3.0V 3.5V VX VOL + 0.15V VOL + 0.15V VOL + 0.3V VOL + 0.3V VY VOH - 0.15V VOH - 0.15V VOH - 0.3V VOH - 0.3V tr = tr <2.0ns <2.0ns <2.5ns <2.5ns |
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