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SN65LVDS050-Q1: TX/RX Speed

Yannick Riou64
Prodigy 60 points

Part Number: SN65LVDS050-Q1
Other Parts Discussed in Thread: SN65LVDS050,

Hi, I am wondering what is the TX and RX data rate as it is not specified in the datasheet. It is just written that it's up to 400 Mbps. But on SN65LVDS050, the speed was specified in a table and the TX and RX wasn't symetric. Is it the same for this component ? Where can I find the information to confirm that ? 

Thanks in advance, 

Regards, 

Yannick Riou 

  • 0
    TI__Genius 10250 points
    Hello,

    The SN65LVDS050-Q1 and SN65LVDS050 are the same in terms of data rate capability. The main factor determining the rate is the rise and fall times which are the same. The typical rise/fall times are 0.8 ns which translates to >400Mbps (using 30% rule of thumb: allowing 30% of bit time for rise time, 30% for fall time and the rest for channel effects). To make sure things work under all conditions, you should use the max rise/fall times (which are not symmetric) and the info about your system (channel, etc).

    Regards,
    Yaser
  • 0 in reply to Yaser Ibrahim
    Prodigy 60 points

    Thanks for your answer.

    Yaser Ibrahim said:
    The typical rise/fall times are 0.8 ns which translates to >400Mbps

    So it means that the table in the SN65LVDS050 datasheet is false ? Because it is written RX 100 Mbps Max in the datasheet. So it's quite confusing to know which information is right. 

  • 0 in reply to Yannick Riou64
    TI__Genius 10250 points
    Hello,

    No. The 400Mbps is mentioned in both datasheets (SN65LVDS050 & SN65LVDS050-Q1) and it is under ideal conditions at room temp, short distance, only one channel is active, etc. The table in the SN65LVDS050 datasheet is conservative and uses max rise/fall times and doesn't assume ideal conditions.

    Regards,
    Yaser