This part is a kind of semiconductor called MAX2601.

Function of this product has 1W RF Power Transistors.

Manufacturers : Maxim

Image and pinout :

Some of the text within the PDF file :

MAX2601/MAX2602 19-1185; Rev 3; 9/08 EVAALVUAAILTAIOBNLEKIT 3.6V, 1W RF Power Transistors for 900MHz Applications General Description The MAX2601/MAX2602 are RF power transistors optimized for use in portable cellular and wireless equipment that operates from three NiCd/NiMH cells or one Li-Ion cell. These transistors deliver 1W of RF power from a 3.6V supply with efficiency of 58% when biased for constant-envelope applications (e.g., FM or FSK). For NADC (IS-54) operation, they deliver 29dBm with -28dBc ACPR from a 4.8V supply. The MAX2601 is a high-performance silicon bipolar RF power transistor. The MAX2602 includes a highperformance silicon bipolar RF power transistor, and a biasing diode that matches the thermal and process characteristics of the power transistor. This diode is use [ ... ]

MAX2601 PDF Datasheet Download