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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LXT971ABC датащи(PDF) 67 Page - Intel Corporation |
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LXT971ABC датащи(HTML) 67 Page - Intel Corporation |
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67 / 90 page  LXT971A 3.3V Dual-Speed Fast Ethernet Transceiver Datasheet 67 Document #: 249414 Revision #: 002 Rev. Date: August 7, 2002 Figure 34. 10BASE-T Jabber and Unjabber Timing Table 35. 10BASE-T Jabber and Unjabber Timing Parameters Parameter Symbol Min Typ1 Max Units Test Conditions Maximum transmit time t1 20 – 150 ms – Unjab time t2 250 – 750 ms – 1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing. Figure 35. 10BASE-T SQE (Heartbeat) Timing Table 36. 10BASE-T SQE Timing Parameters Parameter Symbol Min Typ1 Max Units Test Conditions COL (SQE) Delay after TX_EN off t1 0.65 – 1.6 us – COL (SQE) Pulse duration t2 0.5 – 1.5 us – 1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing. TXD COL t1 t2 TX_EN TX_CLK TX_EN t1 t2 COL |
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