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74ACT257B データシート(PDF) 5 Page - STMicroelectronics |
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74ACT257B データシート(HTML) 5 Page - STMicroelectronics |
5 / 10 page 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 A, B to Y 5.0 (*) 5.0 7.0 8.0 ns tPLH tPHL Propagation Delay Time SEL to Y 5.0 (*) 6.0 9.0 10.0 ns tPZL tPZH Output Enable Time 5.0 (*) 5.0 8.0 9.0 ns tPLZ tPHZ Output Disable Time 5.0 (*) 6.0 9.0 10.0 ns (*) Voltage range is 5V ± 0.5V TEST CIRCUIT TEST SWI TCH tPLH,tPHL Open tPZL,tPLZ 2VCC tPZH,tPHZ Open CL = 50 pF or equivalent (includes jig and probe capacitance) RL =R1 = 500 Ω or equivalent RT =ZOUT of pulse generator (typically 50 Ω) 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 COUT Input Capacitance 5.0 8 pF CPD Power Dissipation Capacitance (note 1) 5.0 31 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) 74ACT257 5/10 |
同様の部品番号 - 74ACT257B |
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同様の説明 - 74ACT257B |
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