The **M2AS1-5444-R2** is a specialized high-density, multi-gigabit connector, typically part of the **M-Series** high-speed mezzanine connectors manufactured by **Amphenol** (or similar high-performance interconnect suppliers). These are primarily used in telecommunications, data centers, and industrial computing for high-bandwidth board-to-board connections. --- ### 1. General Specifications Based on the part numbering convention for this series, here are the technical characteristics: | Feature | Description | | :--- | :--- | | **Type** | Board-to-Board Mezzanine Connector | | **Pin Count** | 400 Pins (organized in a 10x40 or 8x50 grid depending on spacing) | | **Data Rate** | Supports up to 25+ Gbps per differential pair | | **Mounting Type** | Surface Mount (SMT) with BGA (Ball Grid Array) termination | | **Contact Material** | Copper Alloy with Gold over Nickel plating | | **Housing** | High-temperature Liquid Crystal Polymer (LCP) | --- ### 2. Key Electronic Characteristics #### A. High-Speed Signal Integrity The internal geometry is optimized to minimize crosstalk and insertion loss. It is designed to handle high-speed differential signaling protocols such as: * **PCIe Gen 4 & Gen 5** * **100G Ethernet** * **SAS/SATA** #### B. BGA Interface The "R2" suffix often refers to the revision or specific solder ball composition (e.g., Lead-Free/RoHS compliant). The use of **BGA (Ball Grid Array)** attachment allows for: * Self-alignment during the reflow soldering process. * Reduced lead inductance compared to traditional pin-through-hole designs. #### C. Modular Configuration The "5444" portion of the code usually designates the specific stack height and pin configuration. This allows engineers to choose specific "plug" and "receptacle" combinations to achieve the desired distance between two parallel PCBs. --- ### 3. Common Applications These connectors are found in environments where space is limited but data throughput requirements are extreme: 1. **Blade Servers:** Connecting CPU boards to high-speed backplanes. 2. **Network Switches:** High-density line card connections. 3. **Medical Imaging:** Processing high-resolution data in real-time. 4. **FPGA Development Boards:** Connecting mezzanine expansion modules. --- ### 4. Technical Summary Table | Parameter | Value (Typical) | | :--- | :--- | | **Current Rating** | ~0.5A per contact | | **Voltage Rating** | 30V AC (RMS)/DC | | **Operating Temp** | -55°C to +125°C | | **Durability** | 100 - 500 Mating Cycles |