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M74VHC594TTR Scheda tecnica(PDF) 7 Page - STMicroelectronics |
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M74VHC594TTR Scheda tecnica(HTML) 7 Page - STMicroelectronics |
7 / 14 page 74VHC594 7/14 Table 8: 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 Table 9: Dynamic Switching Characteristics 1) Worst case package. 2) Max number of outputs defined as (n). Data inputs are driven 0V to 5.0V, (n-1) outputs switching and one output at GND. 3) Max number of data inputs (n) switching. (n-1) switching 0V to 5.0V. Inputs under test switching: 5.0V to threshold (VILD), 0V to threshold (VIHD), f=1MHz. Figure 5: Test Circuit CL = 15/50pF or equivalent (includes jig and probe capacitance) RT = ZOUT of pulse generator (typically 50Ω) Symbol Parameter Test Condition Value Unit TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. CIN Input Capacitance 7pF COUT Output Capacitance 9pF CPD Power Dissipation Capacitance (note 1) 70 pF 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. VOLP Dynamic Low Voltage Quiet Output (note 1, 2) 5.0 CL = 50 pF 0.9 1.2 V VOLV -0.9 -1.2 VIHD Dynamic High Voltage Input (note 1, 3) 5.0 3.5 V VILD Dynamic Low Voltage Input (note 1, 3) 5.0 1.5 V |
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