RTL8156B
USB 3.0 to 2.5 Gigabit Ethernet controller for high-speed networking
Product Overview
Description
The Realtek RTL8156B is a USB 3.0 to 2.5 Gigabit Ethernet controller, providing 2.5x the speed of standard Gigabit Ethernet over USB interface.
This controller enables high-speed networking for modern laptops, docking stations, and gaming systems that require bandwidth beyond standard Gigabit Ethernet.
RTL8156B supports auto-negotiation for 10/100/1000/2500Mbps and is backward compatible with existing network infrastructure.
Product Series
RTL
Primary Application
High-speed docking stations
Key Features
- 2.5 Gigabit Ethernet support
- USB 3.0 SuperSpeed interface
- Backward compatible with 10/100/1000Mbps
- Auto-negotiation support
- Low power consumption
- Wake-on-LAN support
- VLAN tagging support
- Compact QFN package
Specifications
| Interface | USB 3.0 |
|---|---|
| Speed | 10/100/1000/2500Mbps |
| USB Compatibility | USB 3.0/2.0 |
| Auto-Negotiation | Yes |
| Wake-on-LAN | Supported |
| VLAN | 802.1Q |
| Power Consumption | <1.5W active |
| Operating Temperature | 0°C to +70°C |
| Package | QFN-40 |
| ESD Protection | 4kV contact, 8kV air |
Applications
High-speed docking stations
Electronic system design
Gaming systems
Electronic system design
Content creation workstations
Electronic system design
NAS devices
Electronic system design
High-performance laptops
Electronic system design
FAE Expert Insights
"RTL8156B is perfect for applications needing more than Gigabit speed. We see strong demand from gaming and content creation markets. The USB interface makes it easy to add 2.5GbE to existing systems. Driver support is excellent on Windows and improving on Linux."
Cost-effective 2.5GbE over USB solution
— David Liu, BeiLuo
Frequently Asked Questions
What network equipment do I need for 2.5GbE?
You need 2.5GbE capable switches and routers. Many modern multi-gigabit switches support 2.5GbE. RTL8156B will auto-negotiate down to 1Gbps or 100Mbps if connected to older equipment.
Ensure network infrastructure supports 2.5GbE. Backward compatible with 1GbE.
Does RTL8156B work with USB 2.0?
RTL8156B is backward compatible with USB 2.0 but speed will be limited to USB 2.0 bandwidth. For 2.5GbE performance, USB 3.0 is required.
Use USB 3.0 for full 2.5GbE performance. USB 2.0 will limit speed.
What cable requirements for 2.5GbE?
2.5GbE works over standard Cat5e cables up to 100 meters. Cat6 cables are recommended for best performance and future-proofing.
Cat5e minimum, Cat6 recommended. Standard 100m distance applies.
Is there a PCIe version of 2.5GbE controller?
Yes, RTL8125B is the PCIe version of 2.5GbE controller for internal applications. Use RTL8156B for USB applications and RTL8125B for PCIe.
RTL8156B for USB dongles/docks. RTL8125B for internal PCIe cards.
What operating systems support RTL8156B?
RTL8156B supports Windows 10/11, Linux kernel 5.x+, and macOS. Drivers are built into Windows 10 version 2004 and later.
Native driver support in modern Windows. Check Linux kernel version for compatibility.