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74AC158 Arkusz danych(PDF) 5 Page - STMicroelectronics |
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74AC158 Arkusz danych(HTML) 5 Page - STMicroelectronics |
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5 / 9 page ![]() CAPACITIVE CHARACTERISTICS Symbol Parameter Test Con dition s Value Unit VCC (V) TA =25 oC-40 to 85 oC Mi n. Typ. Max. Min . Max. CIN Input Capacitance 5.0 4 pF CPD Power Dissipation Capacitance (note 1) 5.0 TBD pF 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 • VCC • fIN +ICC/n (per circuit) AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr =tf =3 ns) Symbol Parameter T est Cond iti on Value Unit VCC (V) TA =25 oC-40 to 85 oC Mi n. Typ. Max. Min . Max. tPLH tPHL Propagation Delay Time SELECT to Y 3.3 (*) 1.5 7.0 11.5 1.5 12.5 ns 5.0 (**) 1.5 5.0 9.0 1.5 10.0 tPLH tPHL Propagation Delay Time STROBE to Y 3.3 (*) 1.5 7.0 11.0 1.5 12.0 ns 5.0 (**) 1.55.5 8.51.5 9.5 tPLH tPHL Propagation Delay Time A, B to Y 3.3 (*) 1.55.0 8.01.5 8.5 ns 5.0 (**) 1.54.0 7.01.5 7.5 (*) Voltage range is 3.3V ± 0.3V (**) Voltage range is 5V ± 0.5V TEST CIRCUIT 74AC158 5/9 |
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