Si5351A Clock Generator IC from China

The Si5351A from Skyworks is a programmable I2C clock generator integrated circuit providing up to 8 differential/ single-ended clock outputs from 8kHz to 160MHz. It falls under HTS 8542.39.00 as an 'other' electronic integrated circuit, specifically a timing generator. Used in communications, industrial, and consumer electronics for precise clock distribution.

Duty Rate — China → United States

50%

Rate breakdown

9903.91.0550%Effective with respect to entries on or after January 1, 2025, articles the product of China, as provided for in subdivision (f) of U.S. note 31 to this subchapter
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter

Import Tips

Document frequency synthesis capabilities to distinguish from simple oscillators

Include crystal oscillator specs if external reference is required

Verify PLL/VCO specifications for high-frequency classification