The **M3E25XQD-R** is a specific model within the **HDBaseT 3.0 Transceiver** family (specifically the VS3000 series) developed by Valens Semiconductor. This electronic component is designed to facilitate the transmission of high-bandwidth uncompressed data over long distances using standard copper cabling. --- ### 1. Key Technical Specifications The M3E25XQD-R is characterized by its ability to handle high-definition video, audio, and control signals. | Feature | Specification | | :--- | :--- | | **Interface Standard** | HDBaseT 3.0 | | **Video Resolution** | Up to 4K @ 60Hz (4:4:4) uncompressed | | **Data Throughput** | Up to 18Gbps (Downlink) + 2Gbps (Uplink) | | **Max Distance** | 100 meters (328 ft) over Cat6a cable | | **USB Support** | Integrated USB 2.0 (High Speed) extension | | **Ethernet** | 1Gbps Ethernet (1000Base-T) pass-through | | **Package Type** | BGA (Ball Grid Array) | --- ### 2. Core Electronic Functions This chip acts as a "convergence" engine. It takes multiple distinct data streams and multiplexes them onto a single Category cable. * **Valens Strobe Link:** Uses advanced PAM-4 (Pulse Amplitude Modulation) to maintain signal integrity over long distances. * **Integrated PHY:** Contains the physical layer electronics to drive electrical signals through twisted-pair copper wires. * **Clock Recovery:** Sophisticated circuitry to ensure low-jitter video timing, essential for 4K video playback. * **I2C/UART Extension:** Built-in hardware for serial control signals, allowing a source device to control a remote display. --- ### 3. Functional Blocks The internal architecture of the M3E25XQD-R typically includes: 1. **HDMI Interface:** Connects directly to HDMI 2.0 source or sink components. 2. **Audio Engine:** Supports I2S and S/PDIF formats, including high-bitrate audio (Dolby Atmos, DTS:X). 3. **USB Host/Device Controller:** Bridges USB data for peripheral connectivity (KVM, cameras, touchscreens). 4. **Management Processor:** An internal MCU that handles the link training and HDCP (High-bandwidth Digital Content Protection) encryption/decryption. --- ### 4. Typical Application Circuit In a hardware design, the M3E25XQD-R is usually surrounded by: * **Magnetics (Transformers):** To provide galvanic isolation and EMI filtering for the RJ45 port. * **DC-DC Converters:** To provide the 1.0V, 1.8V, and 3.3V power rails required for the core and I/O. * **Crystal Oscillator:** Provides the reference clock (usually 25MHz or 125MHz). ---