Meaning
International tariff subheading that covers electronic integrated circuits as processors and controllers, whether or not combined with memories, converters, or logic circuits. Products categorized under hs 8542.31 include microprocessors, microcontrollers, and central processing units that execute instruction sets. This classification represents the fundamental building block of the semiconductor trade and is governed by strict technical definitions.
Silicon Classification
Microcontrollers with embedded memory and digital-to-analog converters must be cleared under this code to ensure international uniformity. The classification under hs 8542.31 depends on the physical form of the silicon die, which must be a monolithic or multi-chip integrated circuit. It does not apply to discrete transistors or assemblies mounted on a printed circuit board.
Tariff Exemption
Duty rates for devices in this category are generally set to zero under global information technology agreements. Importers must still file the correct hs 8542.31 code to satisfy statistical monitoring and export control requirements. This reporting ensures that the movement of strategic dual-use semiconductor technology is monitored by government agencies.
Trade compliance software automatically flags these shipments to ensure that proper export licenses are attached before customs clearance.
Compliance Verification
Custom audits often check shipments under this heading to ensure that the item is indeed a raw integrated circuit rather than a completed electronic module. The presence of a printed circuit substrate or external interface connectors would disqualify the item from this category.
