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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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DM9102DEP Fiches technique(PDF) 68 Page - Davicom Semiconductor, Inc. |
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DM9102DEP Fiches technique(HTML) 68 Page - Davicom Semiconductor, Inc. |
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68 / 70 page  68 Final Version: DM9102D-DS-F01 May 10, 2006 9.8 Crystal Selection Guide • A crystal can be used to generate the 25MHz reference clock instead of an oscillator. The crystal must be a fundamental type, series-resonant, connected to X1 and X2, and shunt to ground with 22pF capacitors. (See Table 9-3 and Figure 9-66.) PARAMETER SPEC Type Fundamental, series-resonant Frequency 25 MHz +/-0.005% Equivalent Series Resistance 25 ohms max Load Capacitance 22 pF typ. Case Capacitance 7 pF max. Power Dissipation 1mW max. Table 9-3: Crystal Specifications 97 98 X1 X2 AGND AGND 22pf 25MHz 22pf Figure 9-6 Crystal Circuit Diagram |
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