This part is a kind of semiconductor called CSR8311.

Function of this product has BlueCore QFN Automotive Bluetooth v4.0.

Manufacturers : CSR

Image and pinout :

Some of the text within the PDF file :

CSR8311 QFN Automotive A08 Data Sheet Features BlueCore® CSR8311™ QFN Automotive ■ Fully qualified Bluetooth ® v4.0 system ■ Full-speed Bluetooth operation with full piconet and scatternet support ■ Class 1 Bluetooth power level supported ■ High-sensitivity Bluetooth receiver ■ Wideband speech ■ On-chip SBC encoding ■ On-chip balun ■ Low-power selectable 1.2 to 3.6V I/O ■ No external regulators required for USB supply operation ■ Full-speed USB 2.0 interface ■ Integrated I/O and core regulators ■ High-speed UART port (up to 4Mbps) ■ 2 x PCM/I²S digital audio interfaces ■ Support for IEEE 802 ®.11 coexistence ■ Optimised for use on low-cost PCBs ■ 40-lead 6 x 6 x 0.9mm, 0.5mm pitch QFN ■ Green (RoHS compliant and no antimony or halogenated flame re [ ... ]

CSR8311 PDF Datasheet Download