Rtl9210b Datasheet 2021 'link'

The Realtek RTL9210B-CG is a 10Gbps USB 3.2 Gen2 bridge controller designed to support both NVMe and SATA M.2 SSDs in a dual-protocol enclosure, utilizing a 68-pin QFN package. The chipset allows for automatic protocol detection and provides 10Gbps transfer speeds for NVMe drives, making it a standard in external storage enclosures as detailed in technical documentation. For detailed technical specifications, visit Realtek. RTL9210B-CG - Realtek

The Realtek RTL9210B-CG 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

is a 68-pin QFN "green" package controller that integrates several key power and interface components directly onto the silicon.

Host Interface: USB 3.2 Gen2 (formerly USB 3.1 Gen2), providing theoretical bandwidth up to 10Gbps. Storage Protocols: rtl9210b datasheet 2021

NVMe Mode: Supports PCIe Gen3 x2 with bandwidth up to 16GT/s. It is compliant with NVMe 1.3 specifications.

SATA Mode: Supports SATA Gen3 (6Gbps) with full backward compatibility for Gen2 and Gen1. Power Management:

Includes a built-in switching regulator (5V to 1V) and LDO (5V to 3.3V), reducing the need for external power ICs. The Realtek RTL9210B-CG is a 10Gbps USB 3

Supports advanced power states including PCIe ASPM L1, CLKREQ, and L1 substates.

Ultra-low power mode (approximately 12.5mW) helps prevent overheating in compact enclosures.

Peripheral Support: Integrated support for Type-C connectors, external SPI Flash (up to 32MB), UART, I2C, and customized LED behaviors. RTL9210B vs. RTL9210 (Non-B Variant) Functional blocks (from datasheet-style block diagram)

The most significant update found in the 2021 datasheet is the "B" variant's dual-protocol support. While the original RTL9210 was NVMe-only, the

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

PCIe Gen 3 x2 Interface

• PETp0/n0, PETp1/n1 (Pins 7-10): Transmit differential pairs (to SSD). AC coupling caps (220 nF) must be placed near the RTL9210B.
• PERp0/n0, PERp1/n1 (Pins 3-6): Receive pairs from SSD.
• REFCLKp/n (Pins 23, 24): 100 MHz differential clock output for the SSD.

Functional blocks (from datasheet-style block diagram)

• USB 3.x PHY + MAC
• USB protocol engine (UASP/Bulk)
• SATA PHY + Link layer
• SATA protocol engine (ATA/ATAPI bridge)
• DMA engine and buffer SRAM
• Microcontroller/firmware flash for command processing and feature control
• Power management unit and regulators

3. Power Management (A Major Differentiator)

The RTL9210B is famous in the enthusiast community for its superior power management compared to competitors like the JMicron JMS583.

• Low Power Consumption: Designed with a low-power architecture, which results in cooler operation.
• ASPM (Active State Power Management): Supports L1 sub-states, allowing the device to enter low-power modes during idle periods, reducing heat generation significantly.
• Thermal Throttling: Integrated thermal protection mechanisms. If the controller temperature exceeds a defined threshold, it can throttle performance to prevent damage, though due to the low power design, active cooling (fans) is rarely required for this chip.
• DevSleep: Supports Device Sleep mode for host-initiated power management.