This part is a kind of semiconductor called B4943.

Function of this product has SAW Components.

Manufacturers : EPCOS

Image and pinout :

Some of the text within the PDF file :

SAW Components Data Sheet B4943 SAW Components Low-Loss Filter for Mobile Communication Data Sheet B4943 85,38 MHz SMD ceramic package QCC10C Features s s s s s s s IF filter for mobile telephone Channel selection in CDMA systems Balanced or unbalanced operation possible High rejection, small size Low amplitude ripple Filter surface passivated Package for Surface Mounted Technology (SMT) Terminals s Ni, gold plated Dimensions in mm, approx. weight 0,24 g Pin configuration 10 9 5 4 2, 7 1, 3, 6, 8 Input Balanced input or input ground Output Balanced output or output ground Case ground Not connected Type B4943 Ordering code B39850-B4943-U910 Marking and Package according to C61157-A7-A73 Packing according to F61074-V8105-Z000 Electrostatic Sensitive Device (E [ ... ]

B4943 PDF Datasheet Download