This part is a kind of semiconductor called R2712.

Function of this product has SAW Components Resonator.

Manufacturers : EPCOS

Image and pinout :

Some of the text within the PDF file :

SAW Components Data Sheet R2712 SAW Components Resonator Data Sheet R2712 804.50 MHz SMD Ceramic package QCC8C Features s 2-port resonator s nominal 180˚-phase at resonance s Provides reliable, fundamental mode, quartz fre- quency stabilization i.e. in transmitters or local oscillators s Passivation layer: Protec Terminals s Ni, gold plated Dimensions in mm, approx. weight 0,1 g Pin configuration 2 6 7 3 4,8 Input / Ouptput Output / Input Ground (Input / Output) Ground (Output / Input) Ground (case) Type R2712 Ordering code B39801-R2712-U310 Marking and Package according to C61157-A7-A56 Packing according to F61074-V8169-Z000 Electrostatic Sensitive Device (ESD) Maximum ratings Operable temperature range Storage temperature range DC voltage Source power TA [ ... ]

R2712 PDF Datasheet Download