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DM9161 датащи(PDF) 35 Page - List of Unclassifed Manufacturers |
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DM9161 датащи(HTML) 35 Page - List of Unclassifed Manufacturers |
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35 / 47 page ![]() DM9161 10/100 Mbps Fast Ethernet Physical Layer Single Chip Transceiver Final 35 Version: DM9161-DS-F02 May 10,2002 9.4.6 100BASE-TX Transmit Timing Parameters Symbol Parameter Min. Typ. Max. Unit Conditions tTXc TXCLK Cycle Time 39.998 40 40.002 ns 50ppm tTXh, tTXl TXCLK High/Low Time 16 20 24 ns tTXs TXD [0:3], TXEN, TXER Setup To TXCLK High 12 --- --- ns tTXh TXD [0:3], TXEN, TXER Hold From TXCLK High 0 --- --- ns tTXOD TXCLK to Output Delay 25 ns t1 TXEN Sampled To CRS Asserted --- 4 --- BT t2 TXEN Sampled To CRS De-asserted --- 4 --- BT tTXpd TXEN Sampled To TX+/- Out (Tx Latency) --- 8 --- BT tTXr/f 100TX Driver Rise/Fall Time 3 4 5 ns 90% To 10%, Into 100ohm Differential Note 1. Typical values are at 25℃and are for design aid only; not guaranteed and not subject to production testing. 9.4.7 100BASE-TX Transmit Timing Diagram TXCLK tTX h t2 tTX S t1 tTX pd tTX r/f TXD [0:3], TXEN, TXER CRS 100TX+/- tTXc tTXh tTXOD 9.4.8 100BASE-TX Receive Timing Parameters Symbol Parameter Min. Typ. Max. Unit Conditions tRXc RXCLK Cycle Time 39.996 40 40.004 TRXh, tRXl RXCLK High/Low Time 16 20 24 tRXs RXD [0:3], RXDV, RXER Setup To RXCLK High 10 - - ns tRXh RXD [0:3], RXDV, RXER Hold From RXCLK High 10 - - ns tRXpd RX+/- In To RXD [0:3] Out (Rx Latency) - 15 - BT t1 CRS Asserted To RXD [0:3], RXDV, RXER - 4 - BT t2 CRS De-asserted To RXD [0:3], RXDV, RXER - 0 - BT t3 RX+/- In To CRS Asserted 10 - 14 BT t4 RX+/- Quiet To CRS De-asserted 14 - 18 BT t5 RX+/- In To COL De-Asserted 14 - 18 BT 1. Typical values are at 25℃and are for design aid only; not guaranteed and not subject to production testing. |
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