Cx31993 Datasheet 〈Tested & Working〉

Based on available technical specifications for the CX31993 USB-C DAC chip

Key features

• Inputs: Composite video (CVBS), S-Video (Y/C), typically supports multiple input channels (check variant).
• Video standards: NTSC (including NTSC-M/J), PAL (B/G/H/I/D/K/N), SECAM — automatic standard detection and switching.
• Analog-to-digital conversion: Integrated high-speed ADC(s) for luminance and chrominance.
• Resolution & formats: Supports standard-definition interlaced formats (720×480 NTSC, 720×576 PAL) with programmable output formats (YCbCr/RGB) and output bus configurations.
• Output interfaces: Parallel video data bus (8/10/12/16-bit configurable), ITU-R BT.656 compliant output, optional CCIR/ITU timing modes.
• Video processing: Built-in comb filters, luma/chroma separation, color transient improvement, automatic gain control (AGC), brightness/contrast/saturation/hue controls, color space conversion, white/black level restoration.
• Sync and timing: On-chip sync separator, support for external/internal clocking, gen-lock or free-run modes.
• Audio: May include audio ADC or I2S interface for audio pass-through (verify variant).
• Controls & configuration: I2C (Two-Wire) control interface for register programming and status readback; programmable registers for image adjustments and feature enable/disable.
• Power: Single low-voltage supply (commonly 3.3V core and I/O domains; check datasheet for exact rails and recommended decoupling).
• Package: Commonly available in QFP or BGA packages — refer to mechanical drawing for pinout and thermal recommendations.
• Temperature range: Commercial and industrial variants (e.g., 0–70°C and −40–85°C respectively).

• Power: VBUS (5V), VDDIO (1.8V/3.3V), VDD_CORE (internal regulator output)
• Digital Audio: I2S: BCLK, LRCLK, SDIN (or SDOUT), MCLK
• Control: I2C (SCL, SDA) for register programming
• Analog Output: HPOUT_L, HPOUT_R (direct headphone drive)
• Auxiliary: GPIO for LED, button detection, or jack sense

SNR (Signal-to-Noise Ratio): ~117dB to 128dB (depending on implementation) THD+N: -95dB Output Power: ~31mW @ 32Ω Interface: USB 2.0 Full Speed / High Speed 2. Technical Architecture cx31993 datasheet

For engineers and audio enthusiasts searching for the "CX31993 datasheet," the goal is usually the same: to verify power output (mW), Total Harmonic Distortion (THD+N), and compatibility with high-impedance headphones. While the full manufacturer datasheet is often restricted under NDA (Non-Disclosure Agreement) with Synaptics (which acquired Conexant), this article aggregates the publicly available technical specifications, electrical characteristics, and circuit design implications of the CX31993. Based on available technical specifications for the CX31993