The is a high-performance, low-power USB bridge controller designed to bridge USB 3.2 Gen2 to either PCIe Gen3 x2 (NVMe) or SATA Gen3 . As of 2021, it established itself as the industry standard for "dual-protocol" M.2 SSD enclosures, solving many of the compatibility and overheating issues found in earlier bridge chips. Technical Specifications & Hardware Capabilities RTL9210B-CG
Includes a built-in switching regulator (5V to 1V) and LDO (5V to 3.3V), reducing the need for external power ICs.
Supports advanced power states including , CLKREQ, and L1 substates. rtl9210b datasheet 2021
is a 68-pin QFN "green" package controller that integrates several key power and interface components directly onto the silicon.
Supports SATA Gen3 (6Gbps) with full backward compatibility for Gen2 and Gen1. Power Management: The is a high-performance, low-power USB bridge controller
allows a single enclosure to work with both NVMe and SATA M.2 SSDs. Primary Protocol PCIe NVMe only Primary Protocol PCIe NVMe & SATA SATA Support SATA Support Yes (Gen3, 6Gbps) Max USB Speed Max USB Speed Power Delivery Power Delivery Improved (PD 3.0 on BPD models) Stability and Firmware Enhancements RTL9210B-CG - Realtek
Integrated support for Type-C connectors, external SPI Flash (up to 32MB), UART, I2C, and customized LED behaviors. RTL9210B vs. RTL9210 (Non-B Variant) Supports advanced power states including , CLKREQ, and
The most significant update found in the 2021 datasheet is the "B" variant's . While the original RTL9210 was NVMe-only, the