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CDCLVP111-SP: Is CDCLVP111-SP input cold spareable?

Part Number: CDCLVP111-SP

Tool/software:

With CDCLVP111-SP un-powered, is the input cold spareable? In this cold-sparing condition, signal integrity does not matter. Please inform whether CDCLVP111-SP input can be driven indefinitely with the drive level meeting powered-on spec. Thanks.

  • Hi user, 
    This is not recommended. 
    In the long term it can potentially damage the source-clocks driver, and the core current may go along a path that isn't intended to carry this amount of current. The device can also behave unexpectedly. 

    Best regards, 

    Vicente 

  • Assume CLKP0 / CLKN0 / CLKP1 / CLKN1 are ac-coupled. What is the impedance of CLKP0 / CLKN0 / CLKP1 / CLKN1  to GND when the part is un-powered? For ac-coupled clock input, do you still expect core current?

  • Hi User, 
    I followed up with the design team and for your use case - if you're externally AC coupled and VDD = 0V
    There should be no issue as long as your swing does not exceed +/-0.5V

    Best regards, 

    Vicente