Datasheet |best| | Cx31993

The CX31993 is a high-performance USB-C Audio DAC (Digital-to-Analog Converter) chip widely used in budget-friendly "dongle" adapters to improve sound quality on smartphones and computers. While a full technical datasheet from the manufacturer is not publicly available, community-sourced specifications provide a clear picture of its capabilities. Key Specifications

The Driver Situation

If you are looking up the datasheet because you are dealing with a Linux kernel or Android driver issue, you know that support is crucial. The CX31993 typically interfaces via I2S or PCM for audio data and I2C for control signals. cx31993 datasheet

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7. Quick Start Checklist (If you have the datasheet)

• [ ] Confirm power sequencing (VBUS → VDDIO → core)
• [ ] Verify I2C address (usually 0x22 or 0x48)
• [ ] Program PLL registers to match crystal frequency
• [ ] Enable headphone output (unmute, set volume)
• [ ] Read HP_DET interrupt to detect plug insertion
• [ ] Configure USB descriptors if using custom VID/PID

The datasheet—once a monochrome PDF among many—had become a story: of rescue, of careful reading, of patience and testing. It taught them to look for music where others saw only tables, and to believe that small, well-documented parts, treated with respect, could orchestrate something far larger than their datasheet boxes. The CX31993 is a high-performance USB-C Audio DAC