The **M2AS1-A143-R2** is a specific part number associated with a **Mini PCI Express (mPCIe) to M.2 (NGFF) Adapter**. This electronic component is designed to bridge the gap between older hardware interfaces and modern expansion cards. ### 1. General Specifications This device acts as a hardware bridge, allowing users to install M.2 cards into systems that only provide a Mini PCI Express slot. | Feature | Specification | | :--- | :--- | | **Input Interface** | Mini PCI Express (Full-size or Half-size) | | **Output Interface** | M.2 Key A / Key E (typically for Wireless cards) | | **Dimensions** | Standard mPCIe form factor (approx. 30mm x 51mm) | | **Voltage Regulation** | 3.3V (standard for mPCIe and M.2) | | **Revision** | R2 (Second revision, usually indicating minor PCB or component tweaks) | --- ### 2. Key Electronic Components The adapter is a passive-to-semi-active PCB (Printed Circuit Board). Below are the primary electronic parts found on the board: #### A. Connectors * **mPCIe Gold Fingers:** These are the contact points that plug into the motherboard. They carry PCIe signals, USB 2.0 signals, and 3.3V power. * **M.2 Slot (NGFF):** Usually a **Key A or Key E** slot. This is where the M.2 module (such as a Wi-Fi 6 card) is inserted. #### B. Power Management * **Voltage Regulators/LDOs:** M.2 cards are sensitive to power fluctuations. The board often includes Low Dropout (LDO) regulators to ensure a stable 3.3V delivery. * **Decoupling Capacitors:** Small Surface Mount (SMD) capacitors are placed near the power pins to filter out high-frequency noise and prevent voltage drops during high-speed data transmission. #### C. Signal Routing * **Differential Pairs:** The PCB traces are designed as impedance-controlled differential pairs to maintain signal integrity for high-speed PCIe data. * **Level Shifters (Optional):** Depending on the specific design of the R2 revision, it may include small transistors or ICs to handle the Bluetooth signal (usually via USB pins) between the two interfaces. --- ### 3. Application Use-Case This part is commonly used in industrial PCs, older laptops, or embedded systems where you want to upgrade to modern connectivity standards. 1. **Wi-Fi/Bluetooth Upgrades:** Converting an old mPCIe slot to support an M.2 Intel AX210 card. 2. **Legacy Hardware Support:** Allowing newer M.2 peripherals to run on older motherboards that lack the M.2 physical footprint. --- ### 4. Technical Constraints * **Signal Compatibility:** This adapter typically supports **PCIe and USB signals**. It does **not** convert SATA protocols. * **Physical Space:** Because the adapter adds height to the M.2 card, it may not fit in extremely thin "Ultrabook" chassis.