SAW FILTER

HDF447.725M

S3

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Note:

1. Typical test circuit is shown as below.

2. Passband and reject bands are specified in reference to fc.

3. The turnover temperature, To, is the temperature at the maximum frequency, Fo.

4. The nominal frequency at any case temperature, Tc, inside the operating temperature range may

be calculated from:f=fo[1-FTC(To-Tc)

Typical aging is for 10 years.

3. TEST CIRCUIT

Cp1 =10pF, Ls2 =43nH*, Ls3 =43nH*, Cp4 =10pF

Ls2 = Ls3 = 6 turns of 0.51mm insulated Copper,2.5mm ID.

4. DIMENSION

Ceramic package QCC8C

Dimensions in mm, appr. weight 0.1

Marking：HDF452

HD: Brand

F : Filter

452 : No.