This part is a kind of semiconductor called AX88796BLF.

Function of this product has Low-pin-count Non-PCI 8/16-bit 10/100M Fast Ethernet Controller.

Manufacturers : ASIX

Image and pinout :

Some of the text within the PDF file :

AX88796BLF / AX88796BLI Low-pin-count Non-PCI 8/16-bit 10/100M Fast Ethernet Controller Features High-performance non-PCI local bus Support both 8 bit and 16 bit local CPU interfaces include MCS-51 series, 80186 series CPU and ISA bus SRAM-like host interface, easily interfaced to most common embedded MCUs Embed 8Kx16 bits SRAM for packet buffers Support Slave-DMA to minimize CPU overhead Support burst -mode read for hi ghest performance applications Interrupt pin with programmable Hold-off timer Single-chip Fast Ethernet controller Compatible with IEEE802.3, 802.3u standards Integrate Fast Ethernet MAC/PHY transceiver in one chip Support 10Mbps and 100Mbps data rate Support full and half duplex operations Support 10/ 100Mbps N-way Aut o-negotiation operation Support twisted pair crossover [ ... ]

AX88796BLF PDF Datasheet Download