The W5500 Ethernet module can be used to provide your projects with internet connectivity. W5500 enables users to have the Internet connectivity in their applications just by using the single chip in which TCP/IP stack, 10 / 100 Ethernet MAC and PHY embedded. Supports 8 independent sockets simultaneously. The W5500 Ethernet module has a standard RJ-45 connection. Support 3.3V and 5V input voltage and logic level from SPI. Work with All AVR(Arduino) STM, ARM boards.
price : $4.59
original site : http://robotdyn.com/catalog/communication/ethernet_module_w5500_3_3v_5v/