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M74HCT157 データシート(PDF) 6 Page - STMicroelectronics |
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M74HCT157 データシート(HTML) 6 Page - STMicroelectronics |
6 / 11 page AC ELECTRICAL CHARACTERISTICS (CL =50 pF, Input tr =tf =6 ns) Symbol Parameter Test Conditions Value Unit VCC (V) TA =25 oC 54HC and 74HC -40 to 85 oC 74HC -55 to 125 oC 54HC Min. Typ. Max. Min. Max. Min. Max. tTLH tTHL Output Transition Time 4.5 8 151922 ns tPLH tPHL Propagation Delay Time (A, B - Y) 4.5 16 25 31 38 ns tPLH tPHL Propagation Delay Time (SELECT - Y) 4.5 19 30 38 45 ns tPLH tPHL Propagation Delay Time (STROBE - Y) 4.5 17 27 34 41 ns CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance HCT157 50 pF HCT158 60 pF (*) 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 operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN +ICC/4 (per channel) SWITCHING CHARACTERISTICS TEST CIR- CUIT TEST CIRCUIT ICC (Opr.) INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST. M54/M74HCT157 M54/M74HCT158 6/11 |
同様の部品番号 - M74HCT157 |
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同様の説明 - M74HCT157 |
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