• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 19 subscribers
  • Views 2439 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TXB0304: Frequency and Data rate relationship

FARMAN ULLAH
Prodigy 140 points
Part Number: TXB0304

Dear Team,

In section 6.6, the max data rate when (vcca=vccb=0.9) is 50Mbps. What is the equivalent frequency that can be applied from the function generator to chip?
Or other way, how the data rate is calculated in section 6.6? What are the merits or limits of the output signal since the output signal gets worst as the frequency goes higher and higher

Thanks

  • 0
    TI__Mastermind 39746 points

    Hello Farman,

    The relationship between frequency and data rate (Mbps) is rather complex but in simplistic terms; Frequency = 1/2*(Data rate). In the example you have provided, 50 Mbps is about 25MHz. 

    In the graph that you have selected, the capacitive load is increases while the overall data rate decreases. Furthermore the size of the load has a direct impact on the frequency that the device can communicate at. On the other hand, increasing the values of Vcca and Vccb for similar capacitive loading allows for higher data rates as well. Note that we cannot guarantee good signal integrity if the operating frequency is outside the recommended range given in datasheet.

    Best,

    Jack