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M74HC242C1R Datasheet(PDF) 5 Page - STMicroelectronics |
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M74HC242C1R Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 11 page SWITCHING CHARACTERISTICS TEST WAVEFORM AC ELECTRICAL CHARACTERISTICS (Input tr =tf =6 ns) Symbol Parameter Test Conditions Value Unit VCC (V) CL (pF) 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 50 25 60 75 90 ns 4.5 7 121518 6.0 6 101315 tPLH tPHL Propagation Delay Time 2.0 50 39 90 115 135 ns 4.5 13 18 23 27 6.0 11 15 20 23 2.0 150 51 145 180 220 ns 4.5 17 29 36 44 6.0 14 25 31 37 tPZL tPZH 3 State Output Enable Time 2.0 50 RL =1 K Ω 57 145 180 220 ns 4.5 18 29 36 44 6.0 15 25 31 37 2.0 150 RL =1 K Ω 70 175 220 265 ns 4.5 22 35 44 53 6.0 19 30 37 45 tPLZ tPHZ 3 State Output Disable Time 2.0 50 RL =1 K Ω 45 150 190 225 ns 4.5 20 30 38 45 6.0 17 26 32 38 CIN Input Capacitance 5 10 10 10 pF CPD (*) Power Dissipation Capacitance for HC242 for HC243 30 35 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 M54/M74HC242/243 5/11 |
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