HD3SS3212: About HD3SS3212RKSR and TUSB321 application circuits

Wu Kuang

Part Number: HD3SS3212
Other Parts Discussed in Thread: TUSB321,

Hi, Support Team

Currently I have a schematic for HD3SS3212RKSR and TUSB321. Can I ask the support team to help confirm the correctness? Thank you.

BR,

Kuang

0 Kailyn Chen 8 个月前

hello, the attached schematic is unclear even though I amplifier it, you could refer to the schematic checklist for reference:

If you have any other questions, please follow up directly.

0 Wu Kuang 8 个月前回复 Kailyn Chen

Hi Kailyn,

I have re-uploaded the schematic file, Please help confirm the correctness of the schematic.

0 Kailyn Chen 8 个月前回复 Wu Kuang

Please refer to the schematic checklist, if you have any doubts about which pins, we could discuss each other.

0 Wu Kuang 8 个月前回复 Kailyn Chen

Hi Kailyn,

In the application circuit of the TUSB321 datasheet (Page14), why do TUSB321 CC1&CC2 pin need to be reversed?

Similarly, the polarity of HD3SS321 C0P/C0N & C1P/C1N circuit is also reversed.

Is there any special purpose for this?

If it possible if I don't reverse the polarity of the above pins?

0 Kailyn Chen 8 个月前回复 Wu Kuang

您好，我们直接用中文沟通吧。

首先CC1和CC2 是可以交换的，另外HD3SS3212的差分信号的P和N的极性都是可以交换的，因为layout的原因有时按照PN的顺序无法布线，所以会将PN极性颠倒一下，只要保证凯开关的发送和接收端的PN极性一致即可。

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