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74VHC74T Datasheet(PDF) 4 Page - STMicroelectronics |
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74VHC74T Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 10 page AC ELECTRICAL CHARACTERISTICS (Input tr =tf =3 ns) Symb ol Parameter Test Co nditi on Val ue Un it VCC (V) CL (pF ) TA =25 oC -40 to 85 oC Min. Typ . Max. Min . Max. tPLH tPHL Propagation Delay Time CK to Q or Q 3.3 (*) 15 6.7 11.9 1.0 14.0 ns 3.3 (*) 50 9.2 15.4 1.0 17.5 5.0 (**) 15 4.6 7.3 1.0 8.5 5.0 (**) 50 6.1 9.3 1.0 10.5 tPLH tPHL Propagation Delay Time PR or CLR to Q or Q 3.3 (*) 15 7.6 12.3 1.0 14.5 ns 3.3 (*) 50 10.1 15.8 1.0 18.0 5.0 (**) 15 4.8 7.7 1.0 9.0 5.0 (**) 50 6.3 9.7 1.0 11.0 tw CK Pulse Width HIGH or LOW 3.3 (*) 6.0 7.0 ns 5.0 (**) 5.0 5.0 tw PR or CLR Pulse Width LOW 3.3 (*) 6.0 7.0 ns 5.0 (**) 5.0 5.0 ts Setup Time D to CK HIGH or LOW 3.3 (*) 6.0 7.0 ns 5.0 (**) 5.0 5.0 th Hold Time D to CK HIGH or LOW 3.3 (*) 0.5 0.5 ns 5.0 (**) 0.5 0.5 tREM Removal Time CLR or PR to CK 3.3 (*) 5.0 5.0 ns 5.0 (**) 3.0 3.0 fMAX Maximum Clock Frequency 3.3 (*) 15 80 125 70 MHz 3.3 (*) 50 50 75 45 5.0 (**) 15 130 170 110 5.0 (**) 50 90 115 75 (*) Voltage range is 3.3V ± 0.3V (**) Voltage range is 5V ± 0.5V CAPACITIVE CHARACTERISTICS Symb ol Parameter Test Co nditi ons Valu e Un it VCC (V) TA =25 oC -40 to 85 oC Min. T yp. Max. Mi n. Max. CIN Input Capacitance 3.3 410 10 pF CPD Power Dissipation Capacitance (note 1) 3.3 fIN = 10 MHz 25 pF 1) CPD isdefined as the value of the IC’sinternal equivalent capacitance which is calculated fromthe operating current consumption without load. (Referto Test Circuit).Average operting current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN +ICC/2(per Flip-Fliop) 74VHC74 4/10 |
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