Surface acoustic wave device assembly

A surface acoustic wave device assembly comprising:

• a collective board including a piezoelectric body;
• a plurality of first circuit portions provided on the collective board and respectively including IDT electrodes, and first hot terminals and first ground terminals connected to the IDT electrodes;
• a second circuit portion provided on the collective board and including a functional electrode, and a second hot terminal and a second ground terminal connected to the functional electrode;
• and
• a power supply wiring provided on the collective board so as to surround a periphery of the plurality of first circuit portions and the second circuit portion;
• wherein
• the plurality of first circuit portions define surface acoustic wave devices as band pass filters and the second circuit portion define a band pass filter;
• the plurality of first ground terminals and the plurality of first hot terminals are connected to the power supply wiring, the second ground terminal is connected to the power supply wiring, and the second hot terminal is not connected to the power supply wiring;
• and
• pass bands of the surface acoustic wave devices and a pass band of the band pass filter defined by the second circuit portion are the same or substantially the same.