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M74HCT139C1R Datasheet(PDF) 4 Page - STMicroelectronics |
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M74HCT139C1R Datasheet(HTML) 4 Page - STMicroelectronics |
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 4.5 8 151922 ns tPLH tPHL Propagation Delay Time (A, B - Y) 4.5 19 30 38 45 ns tPLH tPHL Propagation Delay Time (G - Y) 4.5 17 27 34 41 ns CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance 40 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/2 (per decoder) TEST CIRCUIT ICC (Opr.) INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERISTICS TEST. SWITCHING CHARACTERISTICS TEST CIR- CUIT M54/M74HCT139 4/9 |
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