Cx31993 Datasheet Fix [new] Online

Finding an official datasheet is notoriously difficult because Conexant (now part of Synaptics) is no longer as active in the consumer component market, leading to conflicting or incomplete technical specs online. Audio Science Review (ASR) Forum CX31993 Technical Specifications (Consensus)

Users often encounter technical quirks that aren't explained in standard product manuals. Below are the most common "fixes" for CX31993-based devices.

If you need the or reference PCB layout to avoid the common grounding loop issue with this chip, let me know.

The document also includes a from a working Tenhz T4 dongle, serving as a golden reference.

For Mathematics answers, I will always format the answer using $$ syntax without newlines. For example: $$x+5=10$$.

If you’ve landed on this page searching for a you are likely one of two types of people: an audio hardware engineer trying to understand the pinout of the Conexant CX31993 chip, or—more commonly—a frustrated user whose USB-C dongle DAC (Digital-to-Analog Converter) isn’t working properly.

Here is the corrected information for the Cx31993 datasheet:

The has become a ubiquitous entry-level USB audio codec, found in dozens of affordable USB-C to 3.5mm dongles. However, for months, the publicly available datasheets were either incomplete, contained conflicting pinout information, or lacked critical register maps for I²C control. Enter the unofficial “CX31993 Datasheet Fix” – a community-sourced, annotated correction document that has quietly saved hundreds of hobbyist projects.