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Introduction ---------------------------------------------------------------
It has been a year and a half since Intel announced the Thunderbolt 4.
And Apple finally released its Thunderbolt 4 cable after the spring event.
It can be divided into 1.8 m and 3 m, and priced at $159 and $129, respectively.
The 3 m is still unavailable.
So, we got the 1.8 m and took it apart to check why it can be so expensive.

Bill of materials (BOM)
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Intel Thunderbolt ReTimer chip: JHL7040
E-marker chip: Infineon CYPDC1186
Step-down chip: MPS
Diode: ON Semiconductor