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LMX2485E: use LMX2485E as frequency counter

Part Number: LMX2485E
Other Parts Discussed in Thread: LMX2485, USB2ANY, LMX2487E, LMX2487E-EVM




My customer intends to use LMX2485E as frequency counter in place of Fujitsu MB15F72UL which is LTB situation.

App is  FY2018 radio equipment.

Here is question again.



I could not find the path from IF N divider to Ftest/LD in the LMX2485 data sheet

block diagram, but this path exists as MUX[3:0] = 1101 ? Please confirm


Customer think replacement  from Fujitusu to LMX2485E seems available,

but strongly need LMX2485E EVM now. ( LMX2485E EVM and also USB2ANY is  obsolete now, and to modify LMX2487E is so hard )

Would you please when new EVM is available? Or would you please let me know the

alternative way ? 



Sorry to bother you again.

Best Regards


LMX2485_replace from MB15F72UL_again.pptx



  • Kanji,

    Yes, the path exists for all those 16 signals in Table 30, and 1101 corresponding to IF N Divider divided by 2.

    Very coincidently, LMX2485E-EVM is going through an internal update so isn't available on the store now. Since it looks like they are only using the function of the MUX getting IF N divider, LMX2487E has the same blocks and will perform this function the same. Would they like to try the LMX2487E-EVM instead?


    Brian Wang
  • Dear Brian san

    Thank you for your quick answer!

    Please let me confirm

    USB2ANY-uWire Adapter board  is included if I bought LMX2587E-EVM?

    Best Regards