Taiwan Semiconductor Manufacturing Company notified the U.S. that one of its chips had been found in a Huawei product after tech research firm TechInsights took apart the product, a person familiar with the matter said, revealing a possible violation of export restrictions on the Chinese company.

The teardown was of Huawei's Ascend 910B, another source said. The 910B is viewed as most advanced AI chip available from a Chinese company. The first source would not identify the item, but said the TSMC chip was one within a multi-chip system.

TechInsights informed TSMC of the chip before publishing its findings in a report, the person said, prompting the Taiwanese firm to notify the U.S. Commerce Department a couple of weeks ago.