The **M2AS1-6443-R** is a specific part number typically associated with high-speed internal cable assemblies, often used in server and data storage environments. It is most commonly identified as a **SlimSAS (SFF-8654) to SlimSAS cable**, used to connect motherboards or RAID controllers to backplanes. --- ### 1. Technical Specifications Below are the primary electronic and physical characteristics for this component: | Feature | Specification | | :--- | :--- | | **Connector Type A** | SlimSAS 8i (SFF-8654 8-line) | | **Connector Type B** | SlimSAS 8i (SFF-8654 8-line) | | **Data Rate** | Up to 24Gbps (SAS 4.0) or PCIe Gen 4 (16GT/s per lane) | | **Impedance** | 85 Ohms or 100 Ohms (depending on specific sub-revision) | | **Length** | Typically 0.5m to 1.0m (Part number suffix determines length) | | **Configuration** | Straight to Right-Angle (often indicated by the "R" suffix) | --- ### 2. Key Electronic Components The assembly is more than just a wire; it involves several critical electronic engineering elements: * **Twinaxial (Twinax) Cabling:** The core uses high-shielded differential pairs to maintain signal integrity over high frequencies. * **Active vs. Passive:** Most "M2AS" series cables are **passive copper**, meaning they do not contain signal-boosting chips, relying instead on the host's signal conditioning. * **Sideband Signaling:** The cable includes additional wires for the **I2C/SMBus** protocol, allowing the system to monitor drive health, presence, and LED status on the backplane. * **EMI Shielding:** The connectors feature metal "cans" or foils to prevent Electromagnetic Interference (EMI) from leaking out or disrupting the high-speed data stream. --- ### 3. Application Use-Cases The M2AS1-6443-R is generally used in the following hardware architectures: 1. **NVMe Storage:** Connecting U.2 or U.3 drives to a PCIe switch. 2. **SAS-4 Storage:** Connecting high-density SAS drives to a Host Bus Adapter (HBA). 3. **High-Density Servers:** Used in 1U/2U rack servers where space is limited, as SlimSAS connectors have a smaller footprint than traditional Mini-SAS HD. --- ### 4. Part Number Breakdown (Typical) * **M2AS:** Series designation (High-speed internal). * **6443:** Specific wiring map (e.g., 8-channel SlimSAS). * **R:** Usually denotes a **Right-Angle** connector orientation on one end to accommodate tight spaces in server chassis.