The part number **48DV-2CV0-R** typically refers to a high-density, small-form-factor **DDR4 Memory Module**, commonly manufactured by vendors like **SK Hynix** or used in specific server/embedded configurations. Specifically, it often points to a **16GB or 32GB DDR4-2666 or 3200 Registered DIMM (RDIMM)**. Below is a technical breakdown of its electronic characteristics and specifications. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Technology** | DDR4 SDRAM | | **Capacity** | 16GB / 32GB (Variant dependent) | | **Voltage** | 1.2V (Low Power) | | **Speed** | PC4-2666V or PC4-3200 | | **Form Factor** | 288-pin RDIMM (Registered DIMM) | | **Data Integrity** | ECC (Error Correction Code) | | **Configuration** | 2Rx8 or 2Rx4 (Dual Rank) | --- ### 2. Major Electronic Components The module is comprised of several critical integrated circuits (ICs) and passive components: #### A. DRAM Chips (SDRAM) The primary components are the **Dynamic Random Access Memory** chips. * **Function:** Store the actual data bits. * **Fabrication:** Usually 1y or 1z nm process technology to achieve high density and low power consumption. #### B. Registering Clock Driver (RCD) Since this is an **RDIMM**, it includes a central RCD chip. * **Function:** It buffers the address and control signals from the memory controller. * **Benefit:** Reduces the electrical load on the system memory controller, allowing for higher capacities and better signal integrity in server environments. #### C. Serial Presence Detect (SPD) EEPROM A small non-volatile memory chip located on the PCB. * **Function:** Stores timing parameters, manufacturer data, and voltage requirements. * **Communication:** The system BIOS reads this via the **I2C/SMBus** protocol to configure the memory automatically. #### D. Power Management & Passives * **Decoupling Capacitors:** Small ceramic capacitors (MLCCs) placed near every DRAM chip to filter electrical noise and stabilize voltage. * **Termination Resistors:** Used to maintain signal integrity and prevent data reflections on the bus. --- ### 3. Electronic Design Advantages 1. **Low Voltage (1.2V):** Compared to DDR3 (1.5V), this part reduces power consumption by approximately 20-30%, which is critical for thermal management in data centers. 2. **ECC Support:** The electronic architecture includes extra data bits to detect and correct single-bit errors, preventing system crashes. 3. **Signal Integrity:** The "Registered" design ensures that even with multiple modules installed, the electrical timing remains precise. --- ### 4. Typical Pinout Logic The 288-pin interface is divided into several functional groups: * **DQ (Data Lines):** Transfer the actual data. * **DQS (Data Strobes):** Used to capture data. * **CK/CK# (Differential Clocks):** Provide the timing reference. * **CA (Command/Address):** Defines the memory location to be accessed.