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TS3DV642: LVDS Connection

Yuta Nishie
Genius 5660 points

Part Number: TS3DV642

Hi,

As I could not find the circuit example of LVDS connection in the datasheet, I would like to confirm the connection method. As shown in the figure below, I would like to connect 2 LCDs driven by LVDS and switch between LVDS signal and clock (27.2 MHz) with TS3DV642.

image.png

1. Is there any problem that ferrite bead is attached to Dx± line? Is there any problem that 100Ohm termination resistor is attached to Dx±A line? No termination resistor is attached to Dx±B line. (Because the LCD manufacturer replied that termination resistor is unnecessary)

2. I am thinking of using SCL and SDA pins for the differential clock line. Do I need termination resistor or ferrite beads?

3. If you have any application notes or circuit examples for LVDS, please let me know. Also, if there are any points that I should pay attention to for the design, please let me know.

Best Regards,

Nishie

  • 0
    TI__Mastermind 24445 points

    Hello Nishie,

    1. From the mux perspective, having ferrite beads and termination resistors on the line is fine. Though, from signaling perspective, are you planning to have the termination resistors constantly connected? 

    2. You don't need them, but ferrite beads might be helpfull if the mux will be operating in a noisy environment.

    3. We have this FAQ on muxes in LVDS signaling that might help.  

    Thanks,

    Nir 

  • 0 in reply to Nir Gilgur
    Genius 5660 points

    Hi Nir-san,

    Thank you for your support.

    "Though, from signaling perspective, are you planning to have the termination resistors constantly connected? "

    ->The terminating resistor will always be connected. Will there be any problems in this case?

    Best Regards,

    Nishie