Amplifier Integrated Circuits

An IC whose primary and essential character is amplification classifies under 854233. When a device integrates amplification with other dominant functions — such as analog-to-digital conversion, active filtering, or signal conditioning — the classification analysis must weigh which function defines the article's commercial identity. CBP's classification principles and the HS Explanatory Notes for Chapter 85 guide this determination; a binding ruling is recommended for multi-function mixed-signal ICs.

Section 301 tariffs apply based on country of origin, not country of assembly. If an amplifier IC is substantially transformed in Malaysia or the Philippines — for example, through wafer fabrication or full assembly and test — its country of origin for tariff purposes is typically that country, not China, and Section 301 duties would not apply. However, if only minor finishing operations occur outside China, origin may still be attributed to China. A country-of-origin analysis should be conducted for each product line.