Rtl9210b Datasheet 2021 -
The chip supports programmable LED output (Pin 35 in many configurations).
The RTL9210B is distinct for its "dual-protocol" support, allowing it to interface with both NVMe (PCIe) NGFF (SATA)
M.2 SSDs. This flexibility makes it a standard choice for "all-in-one" external drive cases. Key Technical Specifications Upstream Interface (USB): USB 3.2 Gen 2 with speeds up to
Backward compatible with USB 3.2 Gen 1, USB 2.0, and USB 1.1.
Includes a built-in Type-C connector controller with power role swap and cable orientation detection. Downstream Interface (Storage): NVMe Mode:
PCIe Gen3 x2 interface, supporting NVM Express (NVMe) 1.3 protocol. SATA Mode:
Supports SATA Gen3 (up to 6Gbps) and is backward compatible with Gen2/Gen1. Storage Capacity: Generally supports up to max capacity for attached SSDs. Advanced Features Protocol Management: (USB Attached SCSI Protocol) and commands for optimized data transfer and drive longevity. Power Management: rtl9210b datasheet 2021
Dynamically switches power states for NVMe/SATA/USB to save energy and balance performance. Internal Controller:
Embedded with customized RAM/ROM and SPI Flash to handle AHCI and NVMe drivers. Integration:
Integrated 5V to 1V switching regulator and support for GPIOs, eFUSE, and UART interfaces. Resources & Documentation RTL9210B-CG - Realtek
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
stands out for its "dual protocol" capability, allowing it to automatically switch between PCIe and SATA modes based on the installed drive. Key Technical Specifications RTL9210B-CG
acts as a bridge between high-speed USB and internal storage interfaces: The chip supports programmable LED output (Pin 35
Host Interface: USB 3.2 Gen 2 (formerly USB 3.1 Gen 2), supporting transfer speeds up to 10Gbps. Storage Interfaces:
PCI Express: Compatible with Gen 1/Gen 2/Gen 3, utilizing up to 2 lanes (PCIe Gen3x2) for a maximum link speed of 8GT/s per lane.
SATA: Compatible with SATA Gen 1/Gen 2/Gen 3, supporting a maximum link speed of 6Gbps. Protocol Support:
NVMe: Supports standard command sets, NVM Express Base Specification Rev. 1.3, and SMART health monitoring.
SATA/AHCI: Supports standard AHCI (Advanced Host Controller Interface) for SATA SSDs.
Form Factor Support: Frequently used in enclosures for M.2 SSD sizes 2230, 2242, 2260, and 2280. Features and Power Management Protocol support:
The controller is designed for efficiency and versatility in portable storage solutions:
Auto-Switching (PEDET): Uses the PEDET interface of the M.2 mechanical connector to automatically detect and switch between USB-to-PCIe and USB-to-SATA modes.
Power Delivery: The RTL9210BPD-CG variant specifically supports Power Delivery 3.0 via the Type-C connector.
Energy Efficiency: Includes built-in switching regulators (5V to 1V) and LDOs (5V to 3.3V) to minimize external component requirements. It supports ASPM L1, CLKREQ, and L1 substate power management to reduce consumption during idle periods.
Customization: Supports 32Mbytes external SPI Flash for firmware, customized LEDs (blinking frequency/duty cycle), and GPIO/UART/I2C interfaces for advanced system integration. Performance and Compatibility
Real-world performance typically reaches read speeds of approximately 930–1000 MB/s for NVMe drives, while SATA drives are capped by the 6Gbps interface (approx. 500–560 MB/s).
The Realtek RTL9210B-CG is a high-performance, dual-protocol USB-to-PCIe (NVMe) and USB-to-SATA (AHCI) bridge for portable SSDs, featuring automatic protocol detection. Key features include up to 10Gbps transfer speeds for NVMe and 6Gbps for SATA, integrated USB Type-C support, UASP/TRIM command handling, and extensive power management. For detailed technical specifications, visit RTL9210B-CG - Realtek