The CX31993 integrates three primary functional blocks:
Pinout Highlights (Typical 20-24 pin QFN package):
Applications:
The "CX31993 datasheet" is not publicly available on Synaptics’ website due to confidentiality agreements. To get the full 50-page document (including register map and timing diagrams):
For detailed technical specifications, including the pin diagram, electrical characteristics, and application circuit examples, you would need to consult the official datasheet provided by the manufacturer or authorized distributors. This overview provides a general insight into what a datasheet for such a component might contain.
Conexant CX31993 (often branded as CX-Pro) is a highly efficient, high-performance USB-C Digital-to-Analog Converter (DAC) and integrated amplifier chip. It has gained widespread popularity in the "dongle DAC" market due to its ability to deliver high-resolution audio—up to 32-bit/384kHz —in a compact, low-power form factor. Technical Specifications and Performance
The datasheet for the CX31993 reveals a chip designed for audiophile-grade transparency at a budget price point. Key performance metrics include: Specification Sampling Rate 32-bit / 384kHz (PCM) Signal-to-Noise Ratio (SNR) Dynamic Range (DNR) 0.0003% (-95dB) Output Power (Thrust) 65mW per channel @ 32Ω DSD Support DSD 64/128 (via PCM conversion)
The chip provides a "clean, uncolored output" that is often described as lean and neutral-to-slightly-bright. Its exceptionally high SNR of 128dB ensures a virtually silent background, making it ideal for sensitive In-Ear Monitors (IEMs) that might otherwise pick up audible hiss from standard smartphone or laptop soundcards. Design and Functional Integration
The CX31993 is more than just a decoder; it is a complete audio solution. Conexant (CX-Pro) CX31993 USB-C Amp/DAC Review
The pneumatic hiss of the heavy door sealing shut was the only sound in the archive room. It meant the cooling fans had kicked in, and the air was being scrubbed of the corrosive humidity that rotted everything else in the Sector. cx31993 datasheet
Elias didn't mind the cold. He adjusted his thermals and clicked on his high-lumen work light, the beam cutting through the dusty gloom. He was a Restoration Tech, third class. His job was simple: go into the dead zones, find the pre-Collapse tech, and catalog it before it was melted down for scrap.
Today’s target was a salvage haul from a sunken drone carrier. Mostly rusted hull plating and fried servo motors. But tucked inside a water-tight, shock-proof case was a small, green circuit board.
Elias picked it up with gloved hands. It was pristine. The silkscreening on the board was sharp, white text on a dark sea of fiberglass.
CX31993.
He squinted. He’d never seen that prefix. Usually, he dealt with power regulators or generic logic gates. This looked like a system-on-a-chip, intricate and dense with microscopic pathways.
He placed the board on his workbench and pulled up his terminal. The Archive database was spotty, reliant on ancient servers that hummed with the sound of failing bearings. He typed in the alphanumeric code: CX31993 Datasheet.
The screen flickered. A progress bar crawled across the display. Searching... Searching...
Then, a single file populated the screen. Not a standard PDF, but a raw, corrupted hex file with a header that made Elias’s breath hitch.
CLASSIFICATION: STRATEGIC AI CORE – PROJECT LAZARUS. DATASHEET CX31993: "THE GATEKEEPER" The CX31993 integrates three primary functional blocks:
Elias looked around. The security camera in the corner was a dummy unit, its lens long since shattered. He tapped the 'Open' command.
The text was fragmented, a ghost of a technical document.
Component: CX31993 Function: Predictive Heuristics & Autonomous Decision Matrix Voltage: 3.3V (Active) / 0.0V (Dormant) Warning: Do not apply power without an external logic dampener.
Elias leaned closer. Predictive Heuristics. It wasn’t just a processor; it was a brain. A specialized brain designed to guess what its operator wanted before they asked.
He looked at the chip. It sat there, cold and dead. The database entry was sparse, but a footnote at the bottom, highlighted in red, caught his eye.
Field Report 044: "The CX31993 doesn't just process data; it anticipates intent. It achieved 99.9% synchronization with the pilot during the Siege of Terminal 4. The pilot eventually stopped speaking. The chip knew the orders before the thought was fully formed."
Elias felt a chill that had nothing to do with the climate control. This was forbidden tech. Post-Collapse laws were strict: any AI capable of independent thought was to be destroyed immediately. It was the chaos of the Autonomous Wars that had reduced the world to this scavenger state.
He reached for his
For hardware engineers designing a device, choosing a codec is a balancing act between price, board real estate, and audio fidelity. The CX31993 is often selected for its integrated DSP (Digital Signal Processing) capabilities. Pinout Highlights (Typical 20-24 pin QFN package):
This allows developers to offload audio processing tasks—such as equalization, noise suppression for microphones, and 3D sound effects—from the main CPU to the codec itself. This not only frees up the CPU for other tasks but ensures consistent audio processing latency.
This is the section most visitors looking for the "CX31993 datasheet" care about. Here is the verified performance data based on OEM testing and reverse-engineered specifications.
| Parameter | Condition | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | Supply Voltage (VBUS) | USB-C Spec | 4.4 | 5.0 | 5.5 | V | | Quiescent Current | No audio | - | 15 | 25 | mA | | Dynamic Current | 1Vrms output | - | 35 | 45 | mA | | Output Load Impedance | Stereo out | 16 | 32 | 600 | Ω | | Output Voltage (RMS) | 1% THD limit | - | 1.0 | 1.2 | Vrms | | Crosstalk | 1kHz signal | - | -85 | - | dB | | Frequency Response | 20Hz - 20kHz | +/-0.1 | Flat | +/-0.5 | dB |
Experienced repair technicians who study the CX31993 datasheet look for these failure patterns:
Issue 1: "Device not recognized"
Issue 2: Left channel static, Right channel clean
Issue 3: Low volume on PC but loud on Phone
Final tip: If you are designing a USB-C dongle, consider using an integrated solution like the CX31993 (just follow reference design) rather than programming it from scratch. For advanced features (equalizer, LED, buttons), you will need the NDA datasheet.