REF Input Frequency Range for RoboClock

Question: What is the REF input frequency range for RoboClock?

 

Answer:

  If the FB input is connected to an undivided output, the REF input frequency range will be the same as Fnom operation frequency range.

   

                                                                                
    

      Device

   
    

      REF Input Frequency Range

   
    

      CY7B991/2, CY7B991V

   
    

      15MHz to 80MHz

   
    

      CY7B9911

   
    

      15MHz to 100MHz

   
    

      CY7B9911V

   
    

      15MHz to 110MHz

   

 

  If the FB input is connected to a divided-by-2 output, the REF input frequency range will be the same as Fnom/2.

 

                                                                                
    

      Device

   
    

      REF input frequency range

   
    

      CY7B991/2, CY7B991V

   
    

      7.5MHz to 40MHz

   
    

      CY7B9911

   
    

      7.5MHz to 50MHz

   
    

      CY7B9911V

   
    

      7.5MHz to 55MHz

   

 

  If the FB input is connected to a divided-by-4 output, the REF input frequency range will be the same as Fnom/4.

 

                                                                                
    

      Device

   
    

      REF input frequency range

   
    

      CY7B991/2, CY7B991V

   
    

      3.75MHz to 20MHz

   
    

      CY7B9911

   
    

      3.75MHz to 25MHz

   
    

      CY7B9911V

   
    

      3.75MHz to 27.5MHz