This part is a kind of semiconductor called AR9287.

Function of this product has Single-Chip 2x2 MIMO MAC/BB/Radio.

Manufacturers : Atheros

Image and pinout :

Some of the text within the PDF file :

Data Sheet February 2010 AR9287 Single-Chip 2x2 MIMO MAC/BB/Radio with PCIE Interface for 802.11n 2.4 GHz WLANs General Description The Atheros AR9287 is a highly integrated single-chip solution for 2.4 GHz 802.11n-ready WLANs to enable high-performance 2x2 MIMO configurations for applications demanding robust link quality and maximum throughput and range. The AR9287 integrates a multiprotocol MAC, baseband processor, analog-todigital and digital-to-analog (ADC/DAC) converters, 2x2 MIMO radio transceiver including LNA, PA, and RF switch, and PCI Express interface in an all-CMOS device for low power and small form factor applications. The AR9287 implements half-duplex OFDM, CCK, and DSSS baseband processing, supporting up to 150 Mbps for 20 MHz and 300 Mbps for 40 MHz channel operations r [ ... ]

AR9287 PDF Datasheet Download