TLK2711-SP: Matching guide

David Park

Expert 6910 points

Part Number: TLK2711-SP

Hi,

Does below description mean differential 50Ohm matching?

over 1 year ago

0 Lucas Wolter over 1 year ago

TI__Mastermind 30210 points

Hi David,

Yes that's correct, high-speed traces should have 50 ohm matched differential impedance.

Best,

Lucas

0 Ji Min Kang over 1 year ago

Prodigy 10 points

Hi, Lucas

If the tlk2711-sp txp/txn signal line is a differential 50 ohm impedance line width, the line width is about 3 times thicker than the single 50ohm line, but looking at the pcb layout image on the datasheet, it appears to be the same line width as the single 50ohm of the data bus. Lose.
In my opinion, only the single 50 ohm impedance and length matching appear to be a differential pair.
Is the impedance of the tlk2711-sp txp/txn signal line single 50ohm? Is the differential 50ohm? Or is it differential 100ohm? I need an accurate answer.

0 Lucas Wolter over 1 year ago in reply to Ji Min Kang

TI__Mastermind 30210 points

Hi Ji Min,

My apologies, I gave an incorrect answer previously. Upon closer inspection I see that high-speed traces should be 50 ohm single ended or 100 ohm differential. Please see this previous E2E thread for reference.

https://e2e.ti.com/support/tools/simulation-hardware-system-design-tools-group/sim-hw-system-design/f/simulation-hardware-system-design-tools-forum/832295/tlk2711-sp-pcb-layout-impedance-matching?tisearch=e2e-sitesearch&keymatch=tlk2711-sp%2520AND%2520match%252A#

Best,

Lucas

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TLK2711-SP: Matching guide