General Description

The Realtek RTL8201GR(I)-VB-CG (hereafter referred to as the RTL8201GR(I)-VB-CG is a highly integrated Ethernet transceiver that is compatible with 10Base-T, and100Base-TX IEEE 802.3 standards. It provides all the necessary physical layer functions to transmit and receive Ethernet packets over CAT.5 UTP cable.

The RTL8201GR(I)-VB-CG uses state-of-the-art DSP technology and an Analog Front End (AFE) to enable long-distance data transmission and reception over UTP cable with proprietary LD100 mode. For long-distance application over one-paired UTP cable or coaxial cable, 100BASE-T1 and another proprietary mode LD10 are implemented in the RTL8201GR(I)-VB-CG to provide robust transmission and reception.

Data transfer between MAC and PHY is via the MII (Media Independent Interface) or RMII (Reduced Media Independent Interface) for 10BASE-T, 100BASE-TX, 100BASE-T1, LD10, and LD100.


  • Supports IEEE 802.3az-2010 (EEE)
  • 100BASE-TX IEEE 802.3u compatible
  • 10BASE-T IEEE 802.3 compatible
  • 100BASE-T1 IEEE 802.3bw compatible
  • Proprietary mode LD10/LD100
  • Long distance speed:
    • Supports 300m/500m/800m CAT.5e cable in 100BASE-T1/LD100/LD10 respectively.
    • Supports 500m/1000m Coaxial 75-5 cable in 100BASE-T1/LD10 respectively.
  • Supports RMII mode
  • Twisted pair or coaxial cable output
  • Supports Auto-Negotiation / Parallel Detection
  • Supports proprietary Auto-Negotiation for one-paired cable.
  • Supports power down mode
  • Supports Link Down Power Saving
  • Supports Base Line Wander (BLW) compensation
  • Crossover Detection & Auto-Correction
  • Supports Interrupt function
  • Supports Wake-On-LAN (WOL)
  • Adaptive Equalization
  • Automatic Polarity Correction
  • Two network status LEDs
  • Supports 25MHz external crystal or OSC
  • Supports 50MHz external Clock input
  • Provides 50MHz clock source for MAC
  • Low power supply 1.1V and 3.3V; 1.1V is generated by an internal LDO
  • 40nm CMOS process
  • Industrial grade manufacturing process (RTL8201GRI-VB-CG)
  • 24-pin RMII QFN Green package


  • DTV (Digital TV)
  • MAU (Media Access Unit)
  • CNR (Communication and Network Riser)
  • Game Console
  • Printer and Office Machine
  • DVD Player and Recorder
  • Ethernet Hub
  • Ethernet Switch
  • IP Camera with UTP/Coaxial

In addition, the RTL8201GR(I)-VB-CG can be used in any embedded system with an Ethernet MAC that needs a UTP physical connection.