Second Source Crystal Components#
In case a second source HFXO is needed, the components below are suggested:
Crystal Manufacturer | Crystal Part Number | ESR (Ω) | C0 (max) (pF) | Temp (°C) | Temp Tolerance (ppm) | Mfg Tolerance (ppm) | Aging (ppm) | CL (pF) | Footprint (mm) |
|---|---|---|---|---|---|---|---|---|---|
Tai-Saw | TZ3541B | 35 | 1 | -40 to +105 | ±16 | ±7 | ±2 | 10 | 2.0 x 1.6 |
Siward | XTL501170-S315-031 | 35 | 3 | -40 to +105 | ±17 | ±6 | ±2 | 10 | 2.0 x 1.6 |
Siward | XTL501350-S315-027 | 40 | 3 | -40 to +85 | ±15 | ±8 | ±3 | 10 | 2.0 x 1.6 |
Siward | XTL501140-S315-020 | 50 | 3 | -40 to +90 | ±14 | ±8 | ±3 | 10 | 2.0 x 1.6 |
TXC | 8Y39072004 | 35 | 2 | -40 to +105 | ±16 | ±7 | ±2 | 10 | 2.0 x 1.6 |
Other crystal vendors that meet these requirements can be used.
Note: The “CTune” value must be measured and applied to each unit manufactured.
Note: Selecting a crystal is an important step in the design of an end-product. Once an end-product has obtained RF regulatory certifications, the RF regulatory authorities do not allow the change of the crystal without re-certification.