"All pins labeled “N/C” should have no electrical connection" because they aren't actually NC, ha. Sneaky.
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Look carefully at https://www.onsemi.com/pub/Collateral/MG2040-D.PDF … vs https://www.onsemi.com/pub/Collateral/ESD7008-D.PDF … and tell me how those aren't the *same exact chip* being sold with two different pinout diagrams with different pins marked as NC. Ha.
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Update: confirmed, it's true. They really are identical.https://twitter.com/marcan42/status/1123093928553541632 …
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I think Intel i860 or i960 did the same thing for commercial vs defense variants
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They report having different clamping voltages and capacitances, one has noisier curves, and one has a completely different behavior in the negative TLP I-V curve. Also one has square pads on the bottom while the other has pentagonal. Clearly very similar, but not identical chips
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My guess: The MG2040 was made to be a drop-in replacement for the ESD7008 in HDMI applications and allowing slop that doesn't matter for USB/Thunderbolt use since HDMI doesn't need such high bandwidth in the reverse direction.
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