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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MPC8569E датащи(PDF) 70 Page - Freescale Semiconductor, Inc |
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MPC8569E датащи(HTML) 70 Page - Freescale Semiconductor, Inc |
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70 / 127 page  MPC8569E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 1 Ethernet Interface Freescale Semiconductor 70 2.6.4.2.2 SGMII Transmit AC Timing Specifications The following table provides the SGMII transmit AC timing specifications. A source synchronous clock is not supported. The AC timing specifications do not include RefClk jitter. 2.6.4.2.3 SGMII AC Measurement Details Transmitter and receiver AC characteristics are measured at the transmitter outputs (SD_TXn and SD_TXn) or at the receiver inputs (SD_RXn and SD_RXn), as depicted in the following figure, respectively. Figure 29. SGMII AC Test/Measurement Load Table 38. SGMII Transmit AC Timing Specifications At recommended operating conditions with XVDD = 1.0 V ± 3% and 1.1 V ± 3%. Parameter Symbol Min Typ Max Unit Notes Deterministic jitter JD — — 0.17 UI p-p — Total jitter JT — — 0.35 UI p-p 2 Unit interval UI 799.92 800 800.08 ps 1 AC coupling capacitor CTX 10 — 200 nF 3 Notes: 1. Each UI is 800 ps ± 100 ppm. 2. See Figure 30 for single frequency sinusoidal jitter limits. 3. The external AC coupling capacitor is required. It is recommended that it be placed near the device transmitter outputs. TX Silicon + Package C = CTX C = CTX R = 50 Ω R = 50 Ω D+ Package Pin D– Package Pin D+ Package Pin |
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