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TPS25854-Q1: Is there any impedance budget for DP and DM pin for external ESD protection device?

Yoshiki Ochi
Genius 9435 points
Part Number: TPS25854-Q1

Tool/software:

Hi team, 

External ESD protectoin is for TPS25854-Q1 D+ and D-, whose absmax are +6V, are considered. 

On the ohter hand, ESD protection device breakdown voltage are higher than TPS25854-Q1 absmax. 

As discussion on below E2E link, we are care about TPS25854-Q1 impedance budet on DP and DM, could you answer that? 

 TPD2E2U06-Q1: Suitable ESD protection device selection for TPS25854-Q1 D+ and D-  

Regards,
Ochi 

Regards,
Ochi

  • 0
    TI__Mastermind 46271 points

    Hello Ochi,

    By "impedance budget", are you referring to the differential impedance variation for USB data lines? The TPS25854-Q1's DP/DM pins are not for USB 2.0 data transmission. It is only for BC1.2 legacy charging, which are not differential and digital signals that require impedance matching.  

    If you are simply helping a customer find the right external ESD protection device for the TPS25854-Q1's DP/DM pins that is suitable for 6V abs max, is the INT-PD team saying that there isn't any other device to recommend?

    Thank you and best regards,

    Seong