GbE PHY with RGMII interface & EEE feature

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The Realtek RTL8211E-CG/RTL8211EG-CG is a highly integrated Ethernet transceiver that complies with 10Base-T, 100Base-TX, and 1000Base-T IEEE 802.3 standards. It provides all the necessary physical layer functions to transmit and receive Ethernet packets over CAT 5 UTP cable or CAT 3 UTP (10Mbps only) cable.

The RTL8211E/RTL8211EG uses state-of-the-art DSP technology and an Analog Front End (AFE) to enable high-speed data transmission and reception over UTP cable. Functions such as Crossover Detection & Auto-Correction, polarity correction, adaptive equalization, cross-talk cancellation, echo cancellation, timing recovery, and error correction are implemented in the RTL8211E/RTL8211EG to provide robust transmission and reception capabilities at 10Mbps, 100Mbps, or 1000Mbps.

Data transfer between MAC and PHY is via the Reduced Gigabit Media Independent Interface (RGMII) for 1000Base-T, 10Base-T, and 100Base-TX.


Network Interface Adapter, MAU (Media Access Unit), CNR (Communication and Network Riser), ACR (Advanced Communication Riser), Ethernet hub, and Ethernet switch.

In addition, it can be used in any embedded system with an Ethernet MAC that needs a UTP physical connection.

Symmetry Electronics (and its e-commerce division: is an authorized Realtek distributor.


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1000Base-T IEEE 802.3ab Compliant
100Base-TX IEEE 802.3u Compliant
10Base-T IEEE 802.3 Compliant
IEEE 802.3 Compliant RGMII (RTL8211E/RTL8211EG)
IEEE 802.3 Compliant GMII (RTL8211EG only)
Supports IEEE 802.3az Draft 3.2 (Energy Efficient Ethernet)
Built-in Wake-on-LAN (WOL)
Supports Interrupt function
Supports Parallel Detection
Crossover Detection & Auto-Correction
Automatic polarity correction
Supports PHYRSTB core power Turn-Off
Baseline Wander Correction
Supports half/full duplex operation
Supports 120m for CAT.5 cable in 1000Base-T
Supports 3.3V or 2.5V signaling for RGMII/GMII
Supports 25/50MHz external crystal or OSC
Provides 125MHz clock source for MAC
Provides 3 network status LEDs
Supports Link Down power saving
Green Ethernet (Gigabit mode only)
Built-in switching regulator
- 48-pin QFN (RTL8211E)
- 64-pin QFN (RTL8211EG)
0.11m process with very low power consumption

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