This part is a kind of semiconductor called AN612.

Function of this product has Balance Modulator Circuit.

Manufacturers : Panasonic Semiconductor

Image and pinout :

Some of the text within the PDF file :

WIRELESS, RF, AND CABLE Jun 01, 2001 TD-SCDMA Radio Chipset Block Diagram for Handset Application China option for 3G cellular phone is the TD-SCDMA system. A detailed handset transceiver diagram is presented showing MAX2361 as the transmit IC, the MAX2291 as the power amplifier (PA), and the MAX2388 and MAX2309 form the receiver. A VCO buffer amplifier is used to provide isolation and maintains a clean LO signal. Overview TD-SCDMA is the third-generation (3G) cellular phone standard currently under development in China. In November 1999, the TD-SCDMA standard was adopted by the ITU as one of the options in the 3GPP mobile communication standard. TD-SCDMA combines time-division duplex (TDD) and CDMA with up-link (reverse-link) synchronization, a software radio, and a smart antenna, to i [ ... ]

AN612 PDF Datasheet Download