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TPD4E05U06: Replacement for SP1004U-ULC-04UTG?

ArTzy
Genius 14729 points
Part Number: TPD4E05U06
Other Parts Discussed in Thread: TPD4E02B04

Hi Experts,

Cx is looking alternative for SP1004U-ULC-04UTG from Littelfuse, and sems TPD4E05U06 can be used.

Questions:

[1] TPD4E05U06 can be used as replacement? The functional block diagram is not exactly the same (diodes and TVS on TI, TVS only on littelfuse)? Are components equivalent?

[2] What is the meaning of straight-through/flow-through routing section 10.2.1, page 17/36, datasheet revN, February 2022) ? Does this mean that I "will/can/have to" solder/connect the NC pin to the signal pair trace?

[3] On the TI TPD4E05U06, I can see that there are Dn+ and Dn- pins, but, as the functional block diagram is totally symetrical, I feel that this is not imperative to connect "signal pair +" to Dn+. I can connect either signal to either pin, without taking into consideration the polarity. This Dn+/Dn- notation on the TI TPD4E05U06 is more confusing that useful?

[4] I wonder if the TPD4E02B04DQAR should not be a better choice (and a straight forward replacement of SP1004U-ULC-04UTG)?

Thank you.

Regards,
Archie A.

  • +1
    TI__Genius 14240 points

    Hi Archie,

    1. Yes the TI device can be used here they are functionally equivalent. Both of these are 4-ch uni-directional diodes. 

    2. Below is an example of "flow-through routing". The advantage is in routing traces as straight as possible to avoid signal integrity issues with high-speed differential pairs in interfaces such as HDMI or PCIe. The NC pins do not need to be connected. 

    3. You are correct, all pins will have the same functionality. You can connect either signal to either pin. The D+ and D- pin names were just to match USB data lines as an example.

    4.  TPD4E02B04 is a good replacement since the capacitance is closer but it would only work if the signals you're protecting are at 3.6 V or below. Could you confirm the interface or the max voltage level of the signal you're protecting?

    Also the TPD4E02B04 is bi-directional, if the IC you're protecting is sensitive to negative voltage swings I would recommend sticking with a uni-directional device. 

    Regards,

    Sebastian