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HD74AC датащи(PDF) 35 Page - Hitachi Semiconductor |
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HD74AC датащи(HTML) 35 Page - Hitachi Semiconductor |
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35 / 52 page ![]() Design Considerations 34 620 620 T1 D2 D3 D1 5.0V 510 T1,T2 - 2SC641 (K) D1,D2 - HP5082 - 2811 D3 - IN414 OR IN 4148 –5.2V AC ECL Figure 6 Differential Output ECL-to-HD74AC Circuit It should be understood that for FACT, as with other CMOS technologies, input levels that are between specified input values will cause both transistors in the CMOS structure to be conducting. This will cause a low resistive path from the supply rail to ground, increasing the power consumption by several orders of magnitude. It is important that CMOS inputs are always driven as close as possible to the rail. Figure 7 Crystal Oscillator Circuit Implemented with FACT HD74AC00 |
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