HTS 8542.31.00 is an 8-digit tariff item of the U.S. Harmonized Tariff Schedule covering Processors and controllers, whether or not combined with memories, converters, logic circuits, amplifiers, clock and timing circuits, or other circuits. It sits in Chapter 85: Electrical machinery and equipment and parts thereof; sound recorders and reproducers; television image and sound recorders and reproducers, and parts and accessories of such articles, Section XVI: Machinery and Mechanical Appliances; Electrical Equipment; Parts Thereof; Sound Recorders and Reproducers, Television Image and Sound Recorders and Reproducers, and Parts and Accessories of Such Articles and rolls up 13 10-digit statistical lines, all with a general duty rate of Free. 1 Chapter 99 tariff modification currently touches one or more lines under this tariff item.