The part number **2290800-R** typically refers to a high-performance **Serial Attached SCSI (SAS) Raid Adapter** or a specific high-speed **Internal Cable Assembly** (often associated with Microsemi/Adaptec or TE Connectivity ecosystem components). In most enterprise server contexts, this part number is identified as the **Adaptec SmartRAID 3154-8i** or a related 12Gb/s SAS/SATA RAID adapter kit. --- ### 1. Technical Specifications Below are the primary electronic specifications for this hardware category: | Feature | Specification | | :--- | :--- | | **Interface Type** | PCIe Gen 3 x8 | | **Data Transfer Rate** | 12 Gb/s per port | | **Internal Ports** | 8 (typically 2 x x4 SFF-8643) | | **Cache Memory** | 4GB LPDDR4 (on integrated models) | | **RAID Levels** | 0, 1, 5, 6, 10, 50, 60, 1 ADM, 10 ADM | | **Form Factor** | Low-profile MD2 | --- ### 2. Key Electronic Components The device is composed of several critical electronic sub-systems: 1. **RAID On-Chip (ROC):** The "brain" of the card, usually a Microsemi SmartIOC or SmartROC processor that handles parity calculations and I/O management. 2. **Flash-Based Cache Protection:** Includes circuitry to connect to a capacitor (ZMM) which provides power to offload cache to NAND flash in the event of a power failure. 3. **Voltage Regulator Modules (VRM):** On-board components that step down the 12V/3.3V PCIe power to the specific voltages required by the processor and DRAM. 4. **SAS/SATA PHYs:** Physical layer transceivers that manage the high-speed signaling for connected drives. --- ### 3. Connectivity and Signal Integrity The "-R" suffix often denotes a **Retail** packaging or a specific **RoHS** compliant revision. In terms of electronic design, these parts prioritize: * **Differential Signaling:** To minimize electromagnetic interference (EMI) over high-speed data lanes. * **Thermal Management:** Integrated heat sinks are required as these chips can consume between 12W and 18W during peak operation. --- ### 4. Implementation Example If you are integrating this into a system, the electrical path follows this logic: ```mermaid graph LR A[PCIe Slot] --> B[RAID Controller] B --> C[SAS/SATA Backplane] C --> D[Mechanical/SSD Drives] B -- Power Loss -- > E[Cache Backup Capacitor] ```