Its an IC for Rosewill RNX-G1W WIFI b/g USB adapter
Newegg.com - Rosewill RNX-G1W IEEE 802.11b/g USB 2.0 Wireless White Dongle with External 2dBi SMA Antenna Up to 54Mbps Wireless Data Rates 64/128-Bit WEP, WPA, WPA2 - Wireless Adapters
price = $9.99 [after Coupon CODE : EMCMMMV72] + $2.99 (US...