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82575EB датащи(PDF) 49 Page - Intel Corporation |
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82575EB датащи(HTML) 49 Page - Intel Corporation |
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49 / 62 page ![]() Targeted AC Characteristics — Intel® 82575EB Gigabit Ethernet Controller 317679-004 Intel® 82575EB Gigabit Ethernet Controller Revision: 2.11 Datasheet January 2011 49 6.4 Targeted AC Characteristics Table 13. 25 MHz Clock Input Requirements Table 14. Link Interface Clock Requirements Symbol Parameter Min Typ Max Unit f0 Frequency N/A 25.000 N/A MHz df0 Frequency Variation -50 N/A +50 ppm Dc Duty Cycle 40 N/A 60 % tr Rise Time N/A N/A 5 ns tf Fall Time N/A N/A 5 ns Jptp Clock Jitter (peak-to-peak)1 1. Clock jitter is defined according to the recommendations of part 40.6.1.2.5 IEEE 1000Base-T Standard (at least 105 clock edges, filtered by HPF with cut off frequency of 5000 Hz). N/A N/A 250 ps Cin Input Capacitance N/A 20 N/A pF T Operating Temperature N/A N/A 70 °C Aptp Input clock amplitude (peak-to-peak) 1.0 1.2 1.3 V Vcm Clock common mode N/A 0.6 N/A V Symbol Parameter Min Typ Max Unit fGTX1 1. GTX_CLK is used externally for test purposes only. See signals IEEE_TEST1_p and IEEE_TEST1_n. GTX_CLK frequency N/A 125 N/A MHz |
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