Based on the technical nomenclature, the **M2AMS2-21-R** typically refers to a specialized **M.2 (NGFF) connector** or an adapter assembly often used in industrial or server-grade hardware. It is designed to interface SSDs (Solid State Drives) or wireless modules with a motherboard. Below is a breakdown of the electronic specifications and characteristics associated with this type of component. --- ## 1. Technical Specifications This component serves as the physical and electrical bridge between the storage module and the printed circuit board (PCB). | Feature | Specification | | :--- | :--- | | **Connector Type** | M.2 (Next Generation Form Factor - NGFF) | | **Keying** | Typically "M Key" or "B+M Key" | | **Orientation** | Right-Angle / Horizontal (Surface Mount) | | **Number of Pins** | 67-75 Pins (standard for M.2) | | **Data Rates** | Supports PCIe Gen 3/4, SATA 3.0, or USB 3.0 | | **Operating Voltage** | 3.3V (Standard) | --- ## 2. Key Electronic Parts & Materials The assembly of the M2AMS2-21-R consists of several critical materials to ensure signal integrity and durability: ### A. Contact Pins (The Terminals) * **Material:** Phosphor Bronze or Copper Alloy. * **Plating:** Gold plating (often 15μ" to 30μ") over Nickel. This prevents oxidation and ensures high conductivity for high-speed data transmission. ### B. Insulator Body * **Material:** High-temperature Liquid Crystal Polymer (LCP) or Thermoplastic. * **Purpose:** To prevent short-circuiting between pins and withstand the heat of Reflow Soldering during PCB assembly. ### C. Metal Shell / Shielding * **Material:** Stainless Steel or Brass. * **Purpose:** Provides Mechanical grounding and EMI (Electromagnetic Interference) shielding to prevent data corruption. --- ## 3. Signal Integrity Features Because these parts handle high-frequency signals (like PCIe lanes), the electronic design includes: 1. **Impedance Control:** The pins are spaced and shaped to maintain a differential impedance of **85Ω to 100Ω**. 2. **Standoffs:** Integrated solder tabs (Solder Pegs) provide mechanical stability to the PCB so that vibrations do not interrupt the electrical connection. 3. **Low Profile:** The "21" in the suffix often relates to the connector height (e.g., 2.1mm or 4.2mm), allowing for slim device designs. --- ## 4. Typical Application Circuit In an electronic schematic, the part is represented by a 67-pin block connected to the following rails: ```cpp // Common Pin Assignments Pins 1, 3, 5, 7, 9... -> GND (Ground) Pins 2, 4 -> 3.3V Power Pins 11, 13, 17, 19... -> PCIe Lane TX/RX Differential Pairs Pins 70, 72, 74 -> 3.3V Power ```