Background My Customer is looking for replacement of MB15F63UL (Cypress). http://www.cypress.com/file/242116/download
Customer’s goal Looking for low cost PLL or clock generator in place of MB15F63UL ( IF block only in the previous page) Vcc= 3.3V Input 26MHz ( or 25MHz) TCXO Output frequency 1) 276.35MHz 2) 369.95MHz Require C/N > 80~ 90dB/Hz at center frequency at offset=1kHz Low cost ( lower price ;1chip (2ch) or 2 chip)
My idea for Solution 1 CDCM6208 26MHz (or 25MHz) 1:2 276.35MHz 369.95MHz Solution 2 My idea for Solution 2A CDCM61001 2-A 26MHz (or 25MHz) 1:1 369.95MHz 2-B My idea for Solution 2B CDCI6214 26MHz (or 25MHz) 1:1 276.35MHz
Question 1 In case CDCM61001, 24+199/300 MHz input are necessary for output is 369.95MHz . Does it mean 24+0.663333..MHz = 24.663333MHz? Question 2 In case CDCM61001, I could not have 276.35MHz in Webench. (Clock tree builder alert) ….May be too low output frequency? On the other hand, in case CDCI6214 , I could not have 369.95MHz (Clock tree builder alert).. May be too high output frequency? So, I think I have to suggest CDCM6208 , but its 8ch output. Cost is $5.2 at 1ku Would you please advise another solution? Don’t you have smaller (2~4ch) output version of CDCM6208?