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CDC6C: replacement confirm

Allen Lu
Expert 3140 points

Part Number: CDC6C
Other Parts Discussed in Thread: FDC2214,

hi team, 

 would you help to confirm these part is oaky to replace ?

OSC, 40 MHz, 3.3 V, SMD 2.5x1x2.5mm 625L3C040M00000 CTS Electrocomponents

attached the datasheet link : https://www.ctscorp.com/Files/DataSheets/Passives/FCP/Clock-Oscillators/clock-ocillators-625-datasheet.pdf 

 

CDC6CE040000ADLER

CDC6CE040000ADLFR

  • +1
    TI__Genius 17180 points

    Hi Allen, 

    CDC6CE040000ADLFR should work as a direct replacement for the 625L3C040M00000 oscillator. Let me know if you have any other questions on this. 

  • 0 in reply to Connor Lewis
    TI__Expert 3140 points

    Hi Connor,

      tks for the confirmation here.

      this IC is target to pait our FDC2214 device. 

     here attach customer SCH,

    here attached FDC2214 DEMO sch:

    SV601187-002_Sch.PDF

    for customer sch,  the CDC6CE040000ADLFR , the "E" represent high /NC will enable output , and low will disable. so customer should not connect the R29 to GND.

     

    for the Clk output, i am not sure why customer add a pull down R as 470ohm, i purpose we dont need this, am i correct?

  • 0 in reply to Allen Lu
    TI__Genius 17180 points

    Hi Allen, 

    Thanks for sending over the schematic. I agree that R29 should not be populated to make sure the output is enabled. 

    I'm not entirely sure what the intention is for the termination network on the clock output. According to the FDC2214 datasheet, the clock input signaling levels should be rail-to-rail. I would recommend depopulating R2 and R3 unless the customer has some specific reason to reduce the amplitude of the clock signal.