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EZ-USB® GX3™ SuperSpeed USB 3.0 to Gigabit Ethernet Controller | Cypress Semiconductor

EZ-USB® GX3™ SuperSpeed USB 3.0 to Gigabit Ethernet Controller

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GX3 is Cypress's USB-IF certified, USB 3.0 to Gigabit Ethernet controller that enables developers to easily add Gigabit Ethernet connectivity to any system with a USB 3.0 port. GX3 has an integrated GigE MAC and PHY that supports multiple Ethernet modes including 10/100/1000M Gigabit Ethernet (IEEE 802.3ab), 10/100M Fast Ethernet (IEEE 802.3u), 10M Ethernet (IEEE 802.3) as well as Energy Efficient Ethernet (IEEE 802.3az).

GX3 complements Cypress's EZ-PD USB Type-C and Power Delivery solutions enabling USB Type-C to Gigabit Ethernet dongles and docking stations. For more information on the GX3 USB Type-C dongle, please visit the USB Type-C to Gigabit Ethernet dongle page.



GX3 supports advance power saving modes such as Wake-on-LAN, Dynamic power saving modes and AutoDetach, which soft-disconnects when the Ethernet cable is unplugged. It is also compatible with USB 3.0 Link Power Management (LPM), supporting U0, U1, U2 and U3 low-power states. Cypress provides drivers for all major operating systems including Windows, Mac OS, Linux and Android. To download the software tools and drivers, please visit the Software and Drivers webpage.

  1. Read the Getting Started with GX3 App Note and watch the GX3 Introduction video

  2. Download the GX3 Datasheet

  3. Get the GX3 USB 3.0 to Gigabit Ethernet dongle reference design kit

  4. Download the GX3 Drivers and Software tools

  5. Get your Schematics reviewed by the Cypress Applications Engineering Team using the Online Tech Support Case System

Evaluate GX3 using the GX3 USB 3.0 to GigE Reference Design Kit. This dongle is an easy-to-use platform that demonstrates the capabilities of GX3 on multiple operating systems. It is available in both USB Type-A as well as USB Type-C form factors.

Please contact for availability. 

Development Kits

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USB 3.0 Type-A GX3 RDK

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USB 3.0 Type-C GX3 RDK

  • Docking stations
  • USB to Gigabit Ethernet dongles
  • Monitors
  • Network printers
  • USB port replicators
  • Embedded systems
  • Routers and gateways
  • IP TVs, IP STBs
Integration: On-chip USB + GigE PHY and GigE MAC
Configurability: Utility to change VID/PID and MAC address
Power Efficiency: Supports Energy Efficient Ethernet (IEEE 802.3az)
Power Management: Supports low power modes when Ethernet cable unplugged
Small Footprint: 68-pin (8x8mm) QFN