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M54HC257 数据表(PDF) 7 Page - STMicroelectronics |
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M54HC257 数据表(HTML) 7 Page - STMicroelectronics |
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7 / 12 page ![]() TEST CIRCUIT ICC (Opr.) INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF SWITCHING CHARACTERSISTICS TESt. CPD CALCULATION CPD is to be calculated with the following formula by using the measured value of ICC (opr.) in the test circuit opposite. CPD = ICC (opr) fIN × VCC SWITCHING CHARACTERISTICS TEST WAVEFORM M54/M74HC257/258 7/12 |
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