A scheme for transmitting clock signals over a long distance.

user503335153

Other Parts Discussed in Thread: SN65MLVD048, SN65MLVD040, LMK00306, SN65LVDS105, CDCLVD1204

The crystal oscillator frequency is 38.4MHz. We need to transmit the clock signal 100 meters and Into three way.We don't have to divide frequency。the FAE recommend to me LVDS scheme SN65mlvd048 + SN65mlvd040，But the impedance is 55ohm，we use twisted-pair wire as transmission line，the impedance is 100ohm。 Can you recommend a suitable solution for me? the voltage is 3.3v.

over 8 years ago

0 Patrick Kammermayer over 8 years ago

TI__Expert 5325 points

Hello user503335153,
can you please clarify about the signal topology?
Would you like to have three LVDS copies of the 38.4 MHz?

We have clock buffers which are built for 100 Ohm differential termination and we characterize them for seen single point load of 100 Ohm.

Please check the following parts: CDCLVD1204, SN65LVDS105 and LMK00306. (LMK part has a crystal oscillator included, so you could create your own LVDS crystal oscillator).

Best regards,
Patrick

0 user503335153 over 8 years ago in reply to Patrick Kammermayer

Intellectual 810 points

I use SN65LVDS105 as a driver,and if I can select DS90LT012AQ as receiver device , or can you recomended a receiever device for me ?

0 Patrick Kammermayer over 8 years ago in reply to user503335153

TI__Expert 5325 points

Hello user503335153,
the clocking parts would have again multiple outputs. I think DS90LT012AQ is a good choice with its integrated termination.

Best regards,
Patrick

Clock & timing

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A scheme for transmitting clock signals over a long distance.