• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 21 subscribers
  • Views 890 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.

250 MHZ 1.2 V clock generator

XIAOLIANG TAN
Prodigy 80 points
Other Parts Discussed in Thread: CDCM61001

Dear Experts,

          May I know that how to generate 1 250 MHZ 1.2V clock?

Xiaoliang

  • 0
    TI__Mastermind 32575 points

    You may consider CDCM61001, which can generate 250 MHz from 25 MHz crystal or external clock.  1.2 V single-ended output could be achieved using the 3.3 V LVCMOS output with external resistive attenuator circuit.  The device is pin configurable.

    Regards,
    Alan

  • 0 in reply to Alan O
    Prodigy 80 points

    Hi, Alan,

            Thanks. I will check the datasheet and see. 

    Thanks

    Xiaoliang

  • 0 in reply to Alan O
    Prodigy 80 points

    Hi Alan,

             Could I use the LVPECL as the output driver. And terminate it using a 100 ohm resistor for CLKO and CLKOB. Then AC coupled to my chip (Common mode voltage equal s to 0.6 V)? If yes, since VOD have a 0.6 - 1.2 V differential swing, is it possible to let the swing equals to 1.2 V, thus the output could swing 0 - 1.2 V?

              If not, based on your suggestion, will the attenuator  affect the performance? 

    Thanks

    Xiaoliang