New chip-size SAW (Surface Acoustic Wave) packages for surface mount by EPCOS are available in 2 x 2 mm packages for PCS band and 2 x 2.5 mm package for AMPS band applications. Single-ended CSSP filters are available for AMPS and PCS in Tx and Rx versions. For single-ended input/balanced output Rx filters, EPCOS provides a choice of 50-ohm input and 50-ohm output or 50-ohm input and 200-ohm output. Rx filters with balanced outputs and 50-ohm single-ended input provide superior rejection performance.
EPCOS CSSP filters provide clear advantages over standard ceramic technology, including reduced use of PC board space, lower component height, improved electrical performance, power durability and EPCOS patented PROTEC® technology.
PROTEC technology applies a protective layer over the transducer structure and acoustic area, preventing surface contamination and promoting longer filter life. The EPCOS PROTEC layer safeguards against shorts, a common cause of failures during PCB assembly.