Layer 2 Managed 8+2-Port 10/100/1000 Switch Controller

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The Realtek RTL8370MB-CG is a TQFP176 E-PAD, high-performance 8+2-port Gigabit Ethernet switch. It integrates 8 low-power Giga-PHYs that support 1000Base-T/100Base-T/10Base-T.

For specific applications, the RTL8370MB supports two extra interfaces. Extension GMAC1 supports RGMII(3.3v/2.5v)/MII/TMII/RMII/SGMII/1000Base-X/100Base-FX, Extension GMAC2 supports RGMII(3.3v/2.5v/1.8v)/MII/TMII/RMII/HSGMII/SGMII/1000Base-X/100Base-FX. The RTL8370MB implements all the functions of a high-speed switch system; including SRAM for packet buffering, non-blocking switch fabric, and internal register management into a single CMOS device.


• 8-Port 1000Base-T+2-Port 1000Base-X/100Base-FX Un-Managed Switch
• 8-Port 1000Base-T Router with Dual MII/RGMII
• 8-Port 1000Base-T Router with Dual SGMII

Symmetry Electronics is an authorized Realtek distributor.


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Single-chip 8+2-port gigabit non-blocking switch architecture;
Embedded 8-port 10/100/1000Base-T PHY
Each port supports full duplex 10/100/1000M connectivity (half duplex only supported in 10/100M mode)
Full-duplex and half-duplex operation with IEEE 802.3x flow control and backpressure
Extra Interface (Extension GMAC1 and Extension GMAC2) supports
- Dual-port Full Duplex Media Independent Interface (MII)
- Dual-port Full Duplex Turbo Media Independent Interface (TMII)
- Dual-port Reduced Media Independent Interface (RMII)
- Dual-port Reduced Gigabit Media Independent Interface (RGMII)
- Serial Gigabit Media Independent Interface (SGMII)
- IEEE 1000Base-X/ IEEE 100Base-FX
Extension GMAC2 supports HSGMII (High -Serial Gigabit Media Independent Interface, 3.125GHz)

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