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74ACT157M Scheda tecnica(PDF) 4 Page - STMicroelectronics |
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74ACT157M Scheda tecnica(HTML) 4 Page - STMicroelectronics |
4 / 8 page TEST 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 5.0 (*) 1.5 5.5 9.0 1.0 10.0 ns tPLH tPHL Propagation Delay Time STROBE to Y 5.0 (*) 1.55.0 8.51.0 9.0 ns tPLH tPHL Propagation Delay Time A, B to Y 5.0 (*) 1.54.0 7.01.0 8.5 ns (*) Voltage range is 5V ± 0.5V 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 TDB 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) 74ACT157 4/8 |
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