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74LCX244 Fiches technique(PDF) 4 Page - STMicroelectronics |
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74LCX244 Fiches technique(HTML) 4 Page - STMicroelectronics |
4 / 12 page 74LCX244 4/12 Table 7: Dynamic Switching Characteristics 1) Number of outputs defined as "n". Measured with "n-1" outputs switching from HIGH to LOW or LOW to HIGH. The remaining output is measured in the LOW state. Table 8: AC Electrical Characteristics 1) Skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch- ing in the same direction, either HIGH or LOW (tOSLH = | tPLHm - tPLHn|, tOSHL = | tPHLm - tPHLn|) 2) Parameter guaranteed by design 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/8 (per circuit) Symbol Parameter Test Condition Value Unit VCC (V) TA = 25 °C Min. Typ. Max. VOLP Dynamic Low Level Quiet Output (note 1) 3.3 CL = 50pF VIL = 0V, VIH = 3.3V 0.8 V VOLV -0.8 Symbol Parameter Test Condition Value Unit VCC (V) CL (pF) RL ( Ω) ts = tr (ns) -40 to 85 °C -55 to 125 °C Min. Max. Min. Max. tPLH tPHL Propagation Delay Time 2.7 50 500 2.5 1.5 7.5 1.5 8.2 ns 3.0 to 3.6 1.5 6.5 1.5 7.1 tPZL tPZH Output Enable Time 2.7 50 500 2.5 1.5 9.0 1.5 10.5 ns 3.0 to 3.6 1.5 8.0 1.5 9.2 tPLZ tPHZ Output Disable Time 2.7 50 500 2.5 1.5 8.0 1.5 9.2 ns 3.0 to 3.6 1.5 7.0 1.5 7.7 tOSLH tOSHL Output To Output Skew Time (note1, 2) 3.0 to 3.6 50 500 2.5 1.0 1.0 ns Symbol Parameter Test Condition Value Unit VCC (V) TA = 25 °C Min. Typ. Max. CIN Input Capacitance 3.3 VIN = 0 to VCC 6pF COUT Output Capacitance 3.3 VIN = 0 to VCC 10 pF CPD Power Dissipation Capacitance (note 1) 3.3 fIN = 10MHz VIN = 0 or VCC 40 pF |
Numéro de pièce similaire - 74LCX244 |
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Description similaire - 74LCX244 |
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