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Realtek RTL8139D, 100 Mbit/s Ethernet card for 100BASE-T, controller in 100-pin PQFP/LQFP

Realtek Semiconductor Corp RTL8139 is a family of network adapters, which was on the market by 1999.[1]


A RTL8139C chip as seen on a Sega Dreamcast broadband adapter.
  • RTL8139C(L) (PCI, mini-PCI, CardBus, Laptop LAN)
  • RTL8139C(L)+ (PCI, mini-PCI, CardBus, Laptop LAN)
  • RTL8139D(L) (PCI, mini-PCI, PCI LAN/modem combo, Laptop LAN)


Version Volt [V] Features Notes
RTL8139 5 First version of single chip set
RTL8139A 5 Wake-on-LAN Internal registers of chip set was expanded
RTL8139B 5 or 3.3 One clock source ASIC Clock source changed from OSC to Crystal
RTL8139C 3.3 Wake-on-LAN from PCI bus Expanded ACPI for PCI bus 2.2
RTL8139D 2.5 or 3.3 Wake-on-LAN from PCI bus 0.25µ CMOS process, network boot ROM up to 128 kB

RTL8139 Features[edit]

Quantity RTL8139C(L) RTL8139D(L) RTL8139C(L)+
Speed 10/100 Mbit/s
Bus type PCI 2.2
Multicast support Yes
Promiscuous mode Yes
Ports 1x 8P8C
Single chip Yes
Boot ROM / Flash Yes, 128kb, can not be used at the same time with External PHY
Wake-on-LAN Yes (magic packet, wakeup frame) Yes (magic packet, link change, wakeup frame) Yes (magic packet, wakeup frame)
Half/Full duplex Both Both Both
FIFO's Yes, 2x 2k independent Yes, 2x 2k independent Yes, 2x 2k independent
IEEE 802.1Q VLAN Yes
Dual address cycle Yes

Also known as[edit]

  • Realtek RTL8139 Fast Ethernet 10/100M Adapter
  • Realtek RTL8139/810x Family Fast Ethernet NIC

See also[edit]


  1. ^ "Realtek single chip fast Ethernet controller with power management RTL8139B(L)" (PDF). 1999-07-26. Retrieved 2016-04-06. (PDF)

External links[edit]