In practical scenarios, the RTL9210B chipset is known for achieving maximum theoretical speeds of USB 3.2 Gen2.
Realtek RTL9210B Go to product viewer dialog for this item. is a high-performance USB 3.1 Gen 2 bridge controller designed to connect M.2 NVMe and SATA SSDs to a host system via a single USB Type-C interface. Released in its primary datasheet revision 1.1 in June 2020 and widely adopted in consumer enclosures throughout 2021, the
A key advantage touted in the 2021 datasheet is the . It generates all required core and I/O voltages from a single 3.3V or 5V input, reducing BOM cost and PCB area. rtl9210b datasheet 2021
The datasheet provides strict layout guidelines: PCIe differential pairs must be impedance-matched (85–100 Ω) with length matching within 5 mils.
The RTL9210B set a new standard for consumer NVMe enclosures. By 2022, it became the default choice for brands like Orico, Sabrent, Ugreen, and Startech. The 2021 datasheet served as the foundation for countless open-source tools (e.g., rtl9210b-flasher on GitHub) and custom firmwares that unlocked features like higher spin-down timers and LED customization. In practical scenarios, the RTL9210B chipset is known
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Sudden power loss is a major cause of external SSD data corruption. The RTL9210B features an integrated power failure detection circuit. When the 5V USB VBUS drops abruptly, the internal microprocessor uses residual capacitance on the board to gracefully flush cached commands and signal the NVMe/SATA drive to initiate an emergency shutdown sequence. Released in its primary datasheet revision 1
+-------------------+ | RTL9210B-CG | | | USB_TX+/- ──(90Ω)──► Pin 12, 13 | USB_RX+/- ──(90Ω)──► Pin 15, 16 | | | PCIE_TX+/- ─(85Ω)──► Pin 54, 55 | PCIE_RX+/- ─(85Ω)──► Pin 58, 59 | +-------------------+ Impedance Matching
| | Detail | Specification / Value | Notes | | :--- | :--- | :--- | :--- | | General | Part Number | RTL9210B-CG | Standard version | | | Package | 68-pin QFN (8mm x 8mm) | | | | Variant | RTL9210BPD-CG | Adds Power Delivery (PD 3.0) support | | USB Host Interface | Standard | USB 3.2 Gen 2 (10 Gbps) | Formerly known as USB 3.1 Gen 2 | | | Protocols | UASP, BOT | For high-speed, efficient data transfer | | SSD (Device) Interface | PCIe (NVMe) | PCIe Gen 3 x2 | Provides up to 16 Gbps bandwidth | | | SATA (AHCI) | SATA Gen 3 (6 Gbps) | Provides up to 6 Gbps bandwidth | | Power Management | Technologies | ASPM L1, L1 Substates, LTR | Advanced power-saving modes | | Memory/Storage | External Flash | Supports up to 32 MB SPI Flash | For firmware and custom configurations | | Encryption | Hardware | AES-256 | On-the-fly hardware encryption for data security | | Additional I/O | Features | GPIO, eFUSE, UART, I2C | Allows for custom features like LED control | | Oscillator | Frequency | 25 MHz | |
Supports PCIe Gen3 x2 lanes, delivering up to 16 Gbps of theoretical bandwidth to the NVMe drive. This ensures the 10 Gbps USB bus remains the only bottleneck.
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