This part is a kind of semiconductor called ATR2808.

Function of this product has 2.9/5.8 GHz WDCET/ISM Single-chip Transceiver.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • Fully Integrated TX/RX with 2.9 GHz TX VCO for 5.8 GHz Applications Using a Frequency Doubler • Supply Voltage Range 3.4V to 4.6V • TX Preamplifier with 0 dBm Output Power at 2.9 GHz • Ramp-signal Generator for Power Ramping and Power Control of External SiGe Power Amplifier • Fast Settling Synthesizer (1.728 MHz Channel Spacing at 5.8 GHz) • Supports Multiple Reference Clocks (10.368 MHz/13.824 MHz) Benefits • • • • • Extended Battery Operating Time Low Current Consumption Very Small 7 × 7 mm Package Few Low Cost External Components No Mechanical Tuning Required 2.9/5.8 GHz WDCET/ISM Single-chip Transceiver ATR2808 Summary 1. Description The ATR2808 is an RF IC for low-power applications in the 5.8 GHz ISM band. The QFN 48-packaged IC is a complete t [ ... ]

ATR2808 PDF Datasheet Download