DP83867IR: DP83867IR in a 1000Base-KX design (Transformerless)

Richard Gagliardo1

Part Number: DP83867IR
Other Parts Discussed in Thread: DP83869

Can the DP83867IR part be used in a 1000Base-KX (i.e. magnetic-less) design? If so does AN-1519 pretty much apply to this part as well? Are there any restrictions?

Thanks so much,

Rich

over 6 years ago

0 Geet Modi over 6 years ago

TI__Mastermind 26320 points

Hi,

We recommend using DP83869 as it's been characterized for magnetic-less designs.

Regards,
Geet

0 Richard Gagliardo1 over 6 years ago in reply to Geet Modi

Prodigy 30 points

Hi Geet,

Thanks so much for the response. To be clear, if I have two devices that are about 2 feet apart with Gigabit Enet interfaces, I can connect a DP83869 to each side's RGMII port and connect the 4 output pairs together through caps similar to what is shown in figure 5 of AN1519 (http://www.ti.com/lit/an/snla088a/snla088a.pdf), correct? If so, I assume I'd connect TD_P_A of one side to TD_P_A of the other side (through the DC blocking caps) - right?

Thanks again for the help!

Rich

0 Geet Modi over 6 years ago in reply to Richard Gagliardo1

TI__Mastermind 26320 points

Hi,

The connection are similar to magnetics one with

a) Capacitive Coupling

b) No magentics

Regards,

Geet

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DP83867IR: DP83867IR in a 1000Base-KX design (Transformerless)