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

user463911

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.

11 months ago

0 vicente flores prado 11 months ago

TI__Mastermind 29332 points

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

0 user463911 11 months ago in reply to vicente flores prado

Prodigy 160 points

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?

+1 vicente flores prado 11 months ago in reply to user463911

TI__Mastermind 29332 points

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

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