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M74HCT273 Fiches technique(PDF) 5 Page - STMicroelectronics |
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M74HCT273 Fiches technique(HTML) 5 Page - STMicroelectronics |
5 / 10 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 9 151922 ns tPLH tPHL Propagation Delay Time (CLOCK - Q) 4.5 19 30 38 45 ns tPLH tPHL Propagation Delay Time (CLEAR - Q) 4.5 22 32 40 48 ns fMAX Maximum Clock Frequency 4.5 30 71 24 MHz CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance 29 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/8 (per Flip FLop), and the total CPD when n pcs of Flip Flop operate can be gained by the following equations: CPD (total) = 32 + 11 x n SWITCHING CHARACTERISTICS TEST WAVEFORM TEST CIRCUIT ICC (Opr.) M54/M74HCT273 5/10 |
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