The **M2AS1-5221-R2** is a specialized high-speed connector component, typically part of the **M.2 (NGFF - Next Generation Form Factor)** family, often used in networking, telecommunications, and high-end computing peripherals. --- ### 1. General Specifications Based on the part numbering convention (common for manufacturers like Foxconn or JAE), here are the typical technical characteristics: | Feature | Specification | | :--- | :--- | | **Connector Type** | M.2 (NGFF) Slot | | **Orientation** | Right Angle / Horizontal | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Pitch** | 0.50mm | | **Number of Positions** | 67-80 Pins (Commonly 67 active) | | **Keying** | Typically "A" or "E" Key (for WiFi/Bluetooth modules) | | **Height** | 2.21mm or similar low-profile variant | --- ### 2. Key Electronic Components & Materials The construction of this part involves several critical materials and design choices to ensure signal integrity: * **Housing:** High-temperature Thermoplastic (LCP - Liquid Crystal Polymer). This is chosen to withstand the high heat of reflow soldering. * **Contacts:** Copper Alloy. High conductivity is required to handle high-speed data protocols like PCIe Gen 3/4 and USB 3.0. * **Plating:** * **Contact Area:** Gold plating (usually 1u" to 15u") to prevent oxidation and ensure low contact resistance over multiple mating cycles. * **Solder Tail:** Tin or Gold flash over Nickel. * **Solder Pegs/Hold-downs:** Metal tabs on the sides of the connector that provide mechanical stability and grounding to the PCB. --- ### 3. Functional Pinout Categories While specific pinouts depend on the module inserted, the electronic interface of an M.2 "A" or "E" key connector generally handles: 1. **Power Supply:** 3.3V rails to power the M.2 card. 2. **High-Speed Data:** Differential pairs for PCIe (Peripheral Component Interconnect Express). 3. **Communication:** USB 2.0 signals, I2C, or UART for management. 4. **Control Signals:** W_DISABLE (to turn off radios), PERST# (PCIe Reset), and Wake-on-LAN. 5. **Ground (GND):** Multiple ground pins interspersed between high-speed pairs to reduce EMI/Crosstalk. --- ### 4. Application Context The "R2" suffix often denotes a specific revision or packaging style (like Tape & Reel for automated assembly). This part is primarily found in: * **Laptops/Motherboards:** For Wi-Fi 6/6E and Bluetooth combo cards. * **IoT Gateways:** For cellular or localized wireless modules. * **Embedded Systems:** Where space is limited and high-speed throughput is required.