This part is a kind of semiconductor called SKY77550.

Function of this product has Tx Quad-Band / Rx Dual-Band BiFET iPAC FEM.

Manufacturers : Skyworks Solutions

Image and pinout :

Some of the text within the PDF file :

PRELIMINARY DATA SHEET SKY77550 Tx Quad-Band / Rx Dual-Band BiFET iPAC™ FEM for GSM / GPRS (824-915 MHz and 1710-1910 MHz) Applications • Dual-band cellular handsets encompassing - Class 4 GSM850/900 - DCS1800/PCS1900 - Class 12 GPRS multi-slot operation Description SKY77550 is a transmit and receive Front-End Module (FEM) with Integrated Power Amplifier Control (iPAC™) designed in a low profile, compact form factor for dual-band cellular handsets comprising GSM850/900 and DCS1800/PCS1900 operation. The SKY77550 offers a complete Transmit VCO-toAntenna and Antenna-to-Receive SAW filter solution. The FEM also supports Class 12 General Packet Radio Service (GPRS) multi-slot operation. The module consists of a GSM850/900 PA block and a DCS1800/PCS1900 PA block, impedancematching circu [ ... ]

SKY77550 PDF Datasheet Download