The RTL9210B is distinct for its "dual-protocol" support, allowing it to interface with both NVMe (PCIe) NGFF (SATA)
The controller is designed as a bridge between USB 3.1 Gen2 (10Gbps) and internal storage protocols. Specification USB Interface USB 3.1 Gen2 (up to 10Gbps); compatible with USB 2.0/3.0 PCI Express Gen3 x2 (up to 16GT/s); compatible with Gen1 and Gen2 SATA Interface SATA Gen3 (up to 6Gbps); backward compatible with Gen1/Gen2 Connector Integrated Type-C support with orientation detection Protocols UASP (USB Attached SCSI) and BOT (Bulk Only Transfer) Package 68-pin QFN Green package Core Functionality
The RTL9210B is firmware-dependent. The 2021 datasheet references firmware version 1.23.x as the initial production release, with key capabilities:
A key advantage touted in the 2021 datasheet is the integrated power management unit (PMU). It generates all required core and I/O voltages from a single 3.3V or 5V input, reducing BOM cost and PCB area.
The RTL9210B excels in temperature tolerance, while the ASM2362 offers slightly lower power at idle.
| Drive | Sequential Read | Sequential Write | |-------|----------------|------------------| | Samsung 980 Pro 1TB | 1052 MB/s | 1001 MB/s | | WD Black SN750 1TB | 1033 MB/s | 980 MB/s | | Kingston KC2500 1TB | 1045 MB/s | 1022 MB/s |