• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 21 subscribers
  • Views 231 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.

CDCE62002 General Question

Wen73818
Prodigy 200 points
Other Parts Discussed in Thread: CDCE62002

I have two questions on CDCE62002:

1. Can I use a LVCMOS clock signal for XTAL/AUX_IN?

2.  What the output will be before the device being configured? Is there a factory pre-programmed version?

Thanks.

  • 0
    TI__Expert 4585 points

     

    Hello,

     

    1. No, you can use LVCMOS clock for AUX_IN input. If you need to use LVCMOS input, please use REF_IN+. This clock input can receive 3.3V LVCMOS clock directly.

    2. This device has EEPROM and it comes with a default settings. The setting is mentioned in the datasheet at page 24. With 25 MHz input clock, you will get 156.25 MHz LVPECL and 125 MHz LVDS outputs. If the input clock is different frequency than 25 MHz, the PLL will be unlocked right after power up.

     

    Thanks,

    Firoj

     

     

  • 0 in reply to Firoj Kabir
    TI__Expert 4585 points

     

    Hello,

    For quetion1, I meant you can NOT use LVCMOS clock for AUX_IN input.

    Sorry for the confusion.

     

    Thanks,

    Firoj