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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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DP83849IFVS/NOPB датащи(PDF) 27 Page - Texas Instruments |
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DP83849IFVS/NOPB датащи(HTML) 27 Page - Texas Instruments |
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27 / 108 page  Symbol T2.26.1 T2.26.3 T2.26.2 T2.26.4 X1 TXD[1:0] TX_EN PMD Output Pair Valid data TX_CLK TX_EN TXD[3:0] CRS RX_CLK RX-DV RXD[3:0] T2.25.1 DP83849IF www.ti.com SNOSAX8D – JUNE 2009 – REVISED APRIL 2013 4.29 AC Specifications — 10 Mb/s Internal Loopback Timing (1) Parameter Description Notes Min Typ Max Units T2.25.1 TX_EN to RX_DV Loopback 10 Mb/s internal loopback mode 2 µs (1) Measurement is made from the first rising edge of TX_CLK after assertion of TX_EN. 4.30 AC Specifications — RMII Transmit Timing Parameter Description Notes Min Typ Max Units T2.26.1 X1 Clock Period 50 MHz Reference Clock 20 ns T2.26.2 TXD[1:0], TX_EN, Data Setup to X1 rising 4 ns T2.26.3 TXD[1:0], TX_EN, Data Hold from X1 rising 2 ns T2.26.4 X1 Clock to PMD Output Pair Latency (100Mb) 100BASE-TX or 100BASE-FX 11 bits Copyright © 2009–2013, Texas Instruments Incorporated Electrical Specifications 27 Submit Documentation Feedback Product Folder Links: DP83849IF |
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