The (now often produced under the Synaptics umbrella following acquisitions) has become the gold standard for affordable, high-fidelity USB-C to 3.5mm audio adapters. While the public datasheet is restricted under NDA for manufacturers, extensive reverse engineering and community testing have allowed us to reconstruct a "functional datasheet" of its core specifications and electrical characteristics.
This guide is for educational and engineering reference purposes. Always verify pin definitions and electrical limits against the official specific revision of the datasheet provided by the manufacturer before fabrication. cx31993 datasheet