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74AC16245 датащи(PDF) 5 Page - STMicroelectronics |
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74AC16245 датащи(HTML) 5 Page - STMicroelectronics |
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5 / 9 page ![]() 74AC16245 5/9 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 xVCC xfIN +ICC/16(per Latch) TEST CIRCUIT CL = 50 pF or equivalent (includes jig and probe capacitance) RL =R1 = 1KΩ or equivalent 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. CIN Input Capacitance 710 10 10 pF CI/O Input Output Capacitance 14 pF CPD Power Dissipation Capacitance (note 1) 5.0 fIN = 10MHz 25 pF TEST SWITCH tPLH,tPHL Open tPZL,tPLZ 2VCC tPZH,tPHZ GND |
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