SAW FILTER

HDF137.5A

S21

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3. TEST CIRCUIT

4. DIMENSION

5. ENVIRONMENTAL CHARACTERISTICS

5-1 High temperature exposure

Subject the filter to +85℃ for 96 hours. Then release the filter into the room

conditions for 1 to 2 hours prior to the measurement. It shall fulfill the specifications in 2-2.

5-2 Moisture

Keep the filter at 40℃ and 95% rh for 96 hours. Then release the filter into the

room

conditions for 1 to 2 hours prior to the measurement. It shall fulfill the specifications in 2-2.

5-3 Low temperature exposure

Subject the

filter to -40℃ for 96 hours. Then release the filter into the room