DP83867CS datasheet(105/129 Pages) TI2

105 / 129 page

8.2.1.1 Cable Line Driver

The line driver implementation is designed to support simple connections to the transformer and the connector.

The DP83867 includes integrated terminations so no external termination resistors are required.

The connection diagram for the cable line driver is shown in Figure 8-2.

TD_P_A

0.1µF

TD_M_A

TD_P_B

TD_M_B

TD_P_C

TD_M_C

TD_P_D

TD_M_D

1nF

2kV

Pin 1

Pin 2

Pin 3

Pin 6

Pin 4

Pin 5

Pin 7

Pin 8

Each center tap on the side connected to the PHY, must be isolated from one another and connected to ground via a decoupling

capacitor (0.1µF recommended).

Discrete transformer is recommended for better EMC/EMI performance. Pulse Electronics part, HX5008FNL is recommended for a

discrete magnetics component.

Only channels A&B is required for 100mbps/10mbps communication

R//C between the ground connection is recommended for EMI purpose. Please refer to DP83867 Schematic Checklist for

recommended values

Figure 8-2. Magnetics Connections

Magnetic isolation used with the DP83867 can either be a discrete component or integrated with the RJ-45

connector. Refer to Table 8-1 for the electrical requirements.

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DP83867CS, DP83867IS, DP83867E

SNLS504F – OCTOBER 2015 – REVISED JANUARY 2025

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DP83867CS Datasheet(PDF) 105 Page - Texas Instruments