Based on the component identifier **M2CEC-21752-R**, this refers to a specific **M.2 (NGFF) Connector** designed for high-speed data transmission in computing devices. These components are critical for interfacing SSDs, Wi-Fi modules, or cellular cards with a motherboard. ### 1. Component Overview The M2CEC series generally refers to **M.2 Card Edge Connectors**. The suffix "-R" typically denotes **Tape & Reel** packaging for automated SMT (Surface Mount Technology) assembly. | Feature | Specification (Typical) | | :--- | :--- | | **Interface Type** | M.2 (Next Generation Form Factor - NGFF) | | **Pitch** | 0.50 mm | | **Mounting Type** | Surface Mount (SMT) | | **Orientation** | Right Angle / Horizontal | | **Pin Count** | 67 Pins (Standard for B or M keying) | | **Data Rates** | Supports PCIe Gen 3/4, SATA 3.0, USB 3.0 | --- ### 2. Key Electronic Characteristics #### Mechanical Design * **Keying:** These connectors are keyed to prevent incorrect insertion of modules. Common keys include **B-Key** (SSD/WWAN) or **M-Key** (NVMe SSDs). * **Height:** The "21752" portion of the part number often correlates to the physical profile or height of the connector (e.g., 2.15mm or 1.75mm stack height). #### Electrical Performance * **Contact Resistance:** Typically 55mΩ maximum. * **Current Rating:** Approximately 0.5A per pin. * **Voltage Rating:** 50V AC/DC. * **Signal Integrity:** Designed with impedance control (usually 85Ω or 100Ω) to support high-speed differential pairs used in NVMe storage. #### Materials * **Housing:** High-temperature thermoplastic (LCP) to withstand reflow soldering. * **Contacts:** Copper alloy with Gold (Au) plating on the contact area for superior conductivity and corrosion resistance. --- ### 3. Application Use Cases 1. **Storage:** Connecting NVMe or SATA M.2 Solid State Drives. 2. **Connectivity:** Hosting M.2 Wi-Fi 6/6E or Bluetooth modules. 3. **Embedded Systems:** Used in Industrial PCs and NUCs where space is at a premium. --- ### 4. Typical Footprint (Conceptual) ```c // SMT Layout Pattern // [ PINS 1-33 ] [ KEY GAP ] [ PINS 34-67 ] // | | | | | | | | | | | | // ------------------------------------------ // [ SOLDER PAD AREA FOR CONNECTOR BODY ] ```