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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LXT970ATC датащи(PDF) 56 Page - Intel Corporation |
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LXT970ATC датащи(HTML) 56 Page - Intel Corporation |
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56 / 74 page  LXT970A — Dual-Speed Fast Ethernet Transceiver 56 Datasheet Figure 27. MII - 100BASE-FX Transmit Timing / 4B Mode Table 36. MII - 100BASE-FX Transmit Timing Parameters / 4B Mode Parameter Sym Min Typ 1 Max Units2 TXD<3:0>, TX_EN, TX_ER Setup to TX_CLK High t6A 10 –– ns TXD<3:0>, TX_EN, TX_ER Hold from TX_CLK High t6B 5 –– ns TX_EN sampled to CRS asserted t6C – 34 BT TX_EN sampled to CRS de-asserted t6D – 416 BT TX_EN sampled to TPO out (Tx latency) t6E 6 11 14 BT 1. Typical values are at 25 °C and are for design aid only; not guaranteed and not subject to production testing. 2. BT is the duration of one bit as transferred to and from the MAC and is the reciprocal of the bit rate. 100BASE-T bit time = 10- 8 s or 10 ns. t6A t6B t6E t6C t6D 0ns 250ns TXCLK TX_EN TXD<3:0> CRS FIBOP |
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