Replacement: None. It's time for this product to step aside and make room for more cool stuff. This page is for reference only.

WIZnet's W5300 is a tiny CMOS-based single chip with integrated 10/100 Ethernet controller, MAC, and TCP/IP**. **The W5300 is designed for Internet embedded applications where easy implementation, stability, high performance, and effective cost are required. The chip is packed with features, and can be used in a number of embedded applications including home-network devices, serial-to-ethernet, USB-to-ethernet, security systems, building automation, embedded servers and more.

• Supports hardwired TCP/IP protocols : TCP,UDP, ICMP, IPv4, ARP, IGMPv2, PPPoE, Ethernet
• Supports 8 independent SOCKETs simultaneously
• High network performance : Up to 80Mbps (DMA)
• Supports hybrid TCP/IP stack(software and hardware TCP/IP stack)
• IP Fragmentation is not supported
• Internal 128Kbytes memory for data communication(Internal TX/RX memory)
• More flexible allocation internal TX/RX memory according to application throughput
• Supports memory-to-memory DMA (only 16bit Data bus width & slave mode)
• Embedded 10BaseT/100BaseTX Ethernet PHY
• Supports auto negotiation (Full-duplex and half duplex)
• Supports auto MDI/MDIX(Crossover)
• Supports network Indicator LEDs (TX, RX, Full/Half duplex, Collision, Link, Speed)
• Supports a external PHY instead of the internal PHY
• Supports 16/8 bit data bus width
• Supports 2 host interface mode(Direct address mode & Indirect address mode)
• External 25MHz operation frequency (For internal PLL logic, period=40ns)
• Internal 150MHz core operation frequency (PLL_CLK, period=about 6.67ns)
• Network operation frequency (NIC_CLK : 25MHz(100BaseTX) or 2.5MHz(10BaseT))
• 3.3V operation with 5V I/O signal tolerance
• Embedded power regulator for 1.8V core operation
• 0.18 µm CMOS technology
• 100LQFP 14X14 Lead-Free Package

• Datasheet
• W5300 Reference Schematic
• Comparison between W5300 and W5100
• Product Page