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RTL8211FD-CG Datasheet(PDF) 65 Page - Realtek Semiconductor Corp. |
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RTL8211FD-CG Datasheet(HTML) 65 Page - Realtek Semiconductor Corp. |
65 / 72 page ![]() RTL8211F(I)/RTL8211FD(I) Datasheet Integrated 10/100/1000M Ethernet Transceiver 58 Track ID: JATR-8275-15 Rev. 1.1 10.3. Crystal Requirements Table 54. Crystal Requirements Symbol Description/Condition Minimum Typical Maximum Unit Fref Parallel Resonant Crystal Reference Frequency, Fundamental Mode, AT-Cut Type. - 25 - MHz Fref Tolerance Parallel Resonant Crystal Frequency Tolerance, Fundamental Mode, AT-Cut Type. Ta=0°C~70°C. -50 - +50 ppm Fref Duty Cycle Reference Clock Input Duty Cycle. 40 - 60 % ESR Equivalent Series Resistance. - - 50 Ω DL Drive Level. - - 0.5 mW Jitter Broadband Peak-to-Peak Jitter1, 2 - - 200 ps Vih_CKXTAL Crystal Output High Level 1.4 - - V Vil_CKXTAL Crystal Output Low Level - - 0.4 V Note 1: 25kHz to 25MHz RMS < 3ps. Note 2: Broadband RMS < 9ps. Note3: Fref Tolerance +/- 50ppm including effects of aging of the first year, external crystal capacitors, and PCB layout. 10.4. Oscillator/External Clock Requirements Table 55. Oscillator/External Clock Requirements Parameter Condition Minimum Typical Maximum Unit Frequency - - 25/50 - MHz Frequency Tolerance (RTL8211F/RTL8211FD) Ta=0°C~70°C -50 - 50 ppm Frequency Tolerance (RTL8211FI/RTL8211FDI) Ta=-40°C~85°C -50 - 50 ppm Duty Cycle - 40 - 60 % Broadband Peak-to-Peak Jitter 1, 2 - - - 200 ps Vpeak-to-peak - 3.15 3.3 3.45 V Rise Time (10%~90%) - - - 10 ns Fall Time (10%~90%) - - - 10 ns Operating Temperature Range - -40 - 85 °C Note 1: 25kHz to 25MHz RMS < 3ps. Note 2: Broadband RMS < 9ps. Note3: Frequency Tolerance +/- 50ppm including effects of aging of the first year, external crystal capacitors, and PCB layout. |
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