Datasheet 2021 - Rtl9210b

Fully compatible with USB 3.2 Gen 1 (5 Gbps), USB 2.0 (480 Mbps), and USB 1.1.

Supports NVMe command sets up to version 1.3c, handling link power states (L1.1 and L1.2 sub-states) smoothly.

Enclosure controllers are notorious for running hot and draining laptop batteries. The RTL9210B addresses this through dynamic power switching:

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Realtek Semiconductor Corp. (2021). RTL9210B Datasheet: USB3.1 to PCIe/NVMe Bridge Controller (Version 1.0). [PDF document]. Retrieved from [URL if known, or "Realtek website"].

Thanks to UASP support and low latency, it is widely implemented in premium portable drives used to boot alternative operating systems or run heavy editing software directly from external storage.

is a 68-pin QFN "green" package controller that integrates several key power and interface components directly onto the silicon. Fully compatible with USB 3

The chip integrates a 5V-to-3.3V switching regulator and a 5V-to-1.1V Low-Dropout (LDO) regulator. This integration reduces the Bill of Materials (BOM) for manufacturers, requiring fewer external capacitors and inductors on the printed circuit board (PCB). 4. Performance Realities: What 10 Gbps Means in Practice

| Feature | RTL9210B | ASMedia ASM2362 | JMicron JMS583 | | :--- | :--- | :--- | :--- | | Max PCIe Speed | Gen 3 x2 | Gen 3 x2 | Gen 3 x2 | | UASP Support | Full | Full | Partial (no TRIM) | | Operating Temp (max) | 85В°C | 70В°C | 80В°C | | 4Kn Drive Support | Yes (2021 FW) | No | Via beta FW | | Price (2021, 1k units) | $2.85 | $4.20 | $2.60 |

One of the most critical aspects detailed in the 2021 documentation is the chip’s advanced power management subsystem. High-speed NVMe storage bridges are notorious for generating extreme heat. The RTL9210B mitigates this through aggressive Link Power Management (LPM). USB Power States The RTL9210B addresses this through dynamic power switching:

~1,000 MB/s to 1,050 MB/s. This is the practical limit of a USB 3.2 Gen 2 10 Gbps connection after accounting for protocol overhead.

While the RTL9210B datasheet is not openly published by Realtek (company policy generally restricts full datasheets to registered customers and partners), comprehensive technical information can be accessed through:

Before the introduction of dual-protocol controllers like the RTL9210B, consumers and system integrators had to purchase separate enclosures depending on the internal architecture of their M.2 drive: