This part is a kind of semiconductor called B7764.

Function of this product has SAW Components.

Manufacturers : EPCOS

Image and pinout :

Some of the text within the PDF file :

SAW Components Data Sheet B7764 SAW Components Low-Loss Filter for Mobile Communication Data Sheet B7764 897,50 MHz Chip Sized SAW Package DCS6P Features q Low-loss RF filter for mobile telephone EGSM system, transmit path Low amplitude ripple Usable passband 35 MHz Balanced to unbalanced operation Impedance transformation from 100 Ω to 50 Ω q Suitable for GPRS class 1 to 12 q Package for Surface Mounted Technology (SMT) q q q q Terminals q Ni, gold-plated Dimensions in mm, approx. weight 0,010 g Pin configuration 4 6 2 1,3, 5 Balanced input Balanced input Output Ground, to be grounded Type B7764 Ordering code B39901-B7764-E410 Marking and Package according to C61157-A7-A101 Packing according to F61074-V8153-Z000 Electrostatic Sensitive Device (ESD) Maxi [ ... ]

B7764 PDF Datasheet Download