Lucent Technologies Inc.

3

Data Sheet

LU3X54FT

July 2000

QUAD-FET for 10Base-T/100Base-TX/FX

Table of Contents

Tables

Page

Table 19. MR28—Device-Specific Register 1 (Status Register) Bit Descriptions...................................................36

Table 20. MR29—Device-Specific Register 2 (100 Mbits/s Control) Bit Descriptions ............................................37

Table 21. MR30—Device-Specific Register 3 (10 Mbits/s Control) Bit Descriptions ..............................................38

Table 22. MR31—Device-Specific Register 4 (Quick Status) Bit Descriptions .......................................................39

Table 23. Output Pins .............................................................................................................................................40

Table 24. LU3X54FT Modes...................................................................................................................................40

Table 25 . Absolute Maximum Ratings ...................................................................................................................41

Table 26 . Operating Conditions .............................................................................................................................41

Table 27. dc Characteristics ...................................................................................................................................41

Table 28. Thermal Characteristics..........................................................................................................................42

Table 29. MII Management Interface Timing (25 pF Load).....................................................................................43

Table 30. MII Data Timing (25 pF Load) .................................................................................................................44

Table 31. Serial 10 Mbits/s Timing for TPIN, CRS, and RX_CLK...........................................................................46

Table 32. Serial 10 Mbits/s Timing for TX_EN, TPOUT, CRS, and RX_CLK..........................................................46

Table 33. Serial 10 Mbits/s Timing for TX_EN, TPIN, and COL .............................................................................47

Table 34. Serial 10 Mbits/s Timing for RX_CLK, CRS, RXD, TX_CLK, TX_EN, and TXD (25 pF Load)................48

Table 35. Serial 10 Mbits/s Timing for RX_CLK and TX_CLK (25 pF Load) ..........................................................49

Table 36. 100 Mbits/s MII Transmit Timing .............................................................................................................50

Table 37. 100 Mbits/s MII Receive Timing..............................................................................................................51

Figures

Page

Figure 1. LU3X54FT Device Overview .....................................................................................................................7

Figure 2. LU3X54FT Single-Channel Detail Functions ............................................................................................ 8

Figure 3. Typical Single-Channel Twisted-Pair (TP) Interface .................................................................................. 9

Figure 4. Typical Single-Channel Fiber-Optic Interface ..........................................................................................10

Figure 5. Smart 10/100 Mbits/s Bused MII Mode...................................................................................................11

Figure 6. Separate 10/100 Mbits/s Bused MII Mode ..............................................................................................12

Figure 7. LU3X54FT Pinout for Normal MII Mode..................................................................................................13

Figure 8. LU3X54FT Pinout for Bused MII Mode ...................................................................................................14

Figure 9. Thermal Characteristics ..........................................................................................................................42

Figure 10. MDIO Input Timing ................................................................................................................................43

Figure 11. MDIO Output Timing .............................................................................................................................43

Figure 12. MDIO During TA (Turnaround) of a Read Transaction ..........................................................................43

Figure 13. MII Timing Requirements for LU3X54FT ..............................................................................................45

Figure 14. Serial 10 Mbits/s Timing for TPIN, CRS, and RX_CLK .........................................................................46

Figure 15. Serial 10 Mbits/s Timing for TX_EN, TPOUT, CRS, and RX_CLK........................................................46

Figure 16. Serial 10 Mbits/s Timing for TX_EN, TPIN, and COL ...........................................................................47

Figure 17. Serial 10 Mbits/s Timing for RX_CLK, CRS, RXD, TX_CLK, TX_EN, and TXD ...................................48

Figure 18. Serial 10 Mbits/s Timing Diagram for RX_CLK and TX_CLK ...............................................................49

Figure 19. 100 Mbits/s MII Transmit Timing ...........................................................................................................50

Figure 20. 100 Mbits/s MII Receive Timing ............................................................................................................51

(continued)