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74AC74TTR Scheda tecnica(PDF) 5 Page - STMicroelectronics |
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74AC74TTR Scheda tecnica(HTML) 5 Page - STMicroelectronics |
5 / 12 page 74AC74 5/12 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr =tf = 3ns) (*) Voltage range is 3.3V ± 0.3V (**) Voltage range is 5.0V ± 0.5V 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/2 (per Fli p-Flop) 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. tPLH tPHL Propagation Delay Time CK to Q or Q 3.3(*) 7.0 14.0 16.0 17.5 ns 5.0(**) 5.0 10.0 10.5 12.0 tPLH tPHL Propagation Delay Time PR or CLR to Qor Q 3.3(*) 6.0 12.0 13.5 14.0 ns 5.0(**) 4.5 9.5 10.5 10.5 tW Pulse Width HIGH or LOW, CK or PR or CLR 3.3(*) 5.0 1.5 7.0 7.0 ns 5.0(**) 4.0 1.5 5.0 5.0 ts Setup Time D to CK HIGH or LOW 3.3(*) 4.0 -0.2 4.0 4.0 ns 5.0(**) 3.0 -0.2 3.0 3.0 th Hold Time D to CK HIGH or LOW 3.3(*) 2.0 0.2 3.0 3.0 ns 5.0(**) 2.0 0.2 3.0 3.0 tREM Removal Time PR or CLR to CK 3.3(*) 1.0 -1.0 1.0 1.0 ns 5.0(**) 1.0 -0.7 1.0 1.0 fMAX Maximum Clock Frequency 3.3(*) 100 300 90 90 MHz 5.0(**) 140 300 130 130 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 5.0 3 pF CPD Power Dissipation Capacitance (note 1) 5.0 fIN = 10MHz 35 pF |
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