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USB Power Delivery 2.0 vs 3.0

Guru 29720 points

Hi TI members,

My customer saw the following blog.
https://e2e.ti.com/blogs_/b/powerhouse/archive/2016/07/14/usb-power-delivery-2-vs-3

Table1 in above blog shows new feature in USB PD3.0 and I was asked how to deside (optional) or (required).
Are these decided from USB PD v3.0 specification?

If you have any comments, it is helpful for my customer.

Best Regards,
Yaita / Japan disty