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M54HC139 Fiches technique(PDF) 4 Page - STMicroelectronics |
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M54HC139 Fiches technique(HTML) 4 Page - STMicroelectronics |
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4 / 9 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 (A, B - Y) 2.0 45 130 165 195 ns 4.5 15 26 33 39 6.0 13 22 28 33 tPLH tPHL Propagation Delay Time (G - Y) 2.0 39 110 140 165 ns 4.5 13 22 28 33 6.0 11 19 24 28 CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance 46 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 TEST CIRCUIT ICC (Opr.) INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST. SWITCHING CHARACTERISTICS TEST CIR- CUIT M54/M74HC139 4/9 |
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