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74VCXH162245TTR Datenblatt(PDF) 7 Page - STMicroelectronics |
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74VCXH162245TTR Datenblatt(HTML) 7 Page - STMicroelectronics |
7 / 11 page 74VCXH162245 7/11 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/16 (per circuit) TEST CIRCUIT CL = 30 pF or equivalent (includes jig and probe capacitance) RL =R1 = 500Ω or equivalent RT =ZOUT of pulse generator (typically 50Ω) WAVEFORM SYMBOL VALUES Symbol Parameter Test Condition Value Unit VCC (V) TA =25°C Min. Typ. Max. CIN Input Capacitance 2.5 or 3.3 VIN = 0 or VCC 4pF COUT Output Capacitance 2.5 or 3.3 VIN = 0 or VCC 8pF CPD Power Dissipation Capacitance (note 1) 2.5 or 3.3 fIN = 10MHz VIN = 0 or VCC 28 pF TEST SWITCH tPLH,tPHL Open tPZL,tPLZ (VCC = 3.0 to 3.6V) 6V tPZL,tPLZ (VCC = 2.3 to 2.7V) 2VCC tPZH,tPHZ GND Symbol VCC 3.0 to3.6V 2.3 to 2.7V VIH 2.7V VCC VM 1.5V VCC/2 VX VOL + 0.3V VOL + 0.15V VY VOH - 0.3V VOH - 0.15V |
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