The chip is an "all-in-one" solution commonly found in budget audiophile "dongles" (USB-C to 3.5mm adapters) such as the or Abigail .
The has rapidly become a favorite among audiophiles and DIY electronics enthusiasts. Known for its impressive signal-to-noise ratio and low power consumption, this System-on-Chip (SoC) is the heart of many popular USB-C to 3.5mm "dongle" DACs. cx31993 datasheet
Connects directly to the USB-C port.
Since the official PDF is restricted, the hardware community has mapped the CX31993 in USB-C dongles (like the Ugreen 50744 and CableCreation). The chip is usually a 3mm x 3mm QFN. The chip is an "all-in-one" solution commonly found