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74VHC157 Datasheet(PDF) 4 Page - STMicroelectronics |
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74VHC157 Datasheet(HTML) 4 Page - STMicroelectronics |
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4 / 9 page  CAPACITIVE CHARACTERISTICS Symb ol Parameter T est Cond ition s Val ue Un it TA =25 oC -40 to 85 oC Min. Typ . Max. Min . Max. CIN Input Capacitance 4 10 10 pF CPD Power Dissipation Capacitance (note 1) 20 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 operating current can be obtained by the following equation. ICC(opr) = CPD • VCC • fIN +ICC/4 (per Channel) 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 A, B to Y 3.3 (*) 15 6.2 9.7 1.0 11.5 ns 3.3 (*) 50 8.7 13.2 1.0 15.0 5.0 (**) 15 4.1 6.4 1.0 7.5 5.0 (**) 50 5.6 8.4 1.0 9.5 tPLH tPHL Propagation Delay Time SELECT to Y 3.3 (*) 15 8.4 13.2 1.0 15.5 ns 3.3 (*) 50 10.9 16.7 1.0 19.0 5.0 (**) 15 5.3 8.1 1.0 9.5 5.0 (**) 50 6.8 10.1 1.0 11.5 tPLH tPHL Propagation Delay Time STROBE to Y 3.3 (*) 15 8.7 13.6 1.0 16.0 ns 3.3 (*) 50 11.2 17.1 1.0 19.5 5.0 (**) 15 5.6 8.6 1.0 10.0 5.0 (**) 50 7.1 10.6 1.0 12.0 (*) Voltage range is 3.3V ± 0.3V (**) Voltage range is 5V ± 0.5V 74VHC157 4/9 |
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Similar Description - 74VHC157 |
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