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M74HC279C1R Datasheet(PDF) 4 Page - STMicroelectronics |
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M74HC279C1R Datasheet(HTML) 4 Page - STMicroelectronics |
4 / 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 2.0 30 75 95 110 ns 4.5 8 151922 6.0 7 131619 tPLH tPHL Propagation Delay Time (S1, S2 - Q) 2.0 45 130 165 195 ns 4.5 15 26 33 39 6.0 13 22 28 33 tPLH tPHL Propagation Delay Time (S - Q) 2.0 38 100 125 150 ns 4.5 12 20 25 30 6.0 10 17 21 26 tPHL Propagation Delay Time (R - Q) 2.0 42 120 150 180 ns 4.5 14 24 30 36 6.0 12 20 26 31 CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance 18 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 SWITCHING CHARACTERISTICS TEST WAVEFORM M54/M74HC279 4/10 |
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