FCom Fuji Crystal · FSF-5050 Series · SAW Filter
262 / 265 / 267.5 / 268 MHz SAW Filters
FSF-5050-262M · FSF-5050-265M · FSF-5050-267M5 · FSF-5050-268M
Four frequency options for VHF signal selection and IF receiver filtering in a 5.0 × 5.0 mm SMD package. Compare the specified passband, insertion loss, ripple and operating temperature to match your receiver requirements.
Choose by passband and temperature
Find the model for your signal band
The combined FCom document contains one page per model. The intervals below specify where insertion loss and ripple apply; operating limits remain model-specific.
SAW Filter · 262 MHz
FSF-5050-262M
262 MHz
Specified passband: 260–264 MHz (4 MHz interval for IL and ripple)
- Insertion loss
- 1.8 dB typ. / 3.0 dB max.
- Amplitude ripple
- 0.7 dB typ. / 2.0 dB max.
- Operating temperature
- −40 to +85 °C
- Source / load test termination
- 50 Ω / 50 Ω
SAW Filter · 265 MHz
FSF-5050-265M
265 MHz
Specified passband: 261–269 MHz (8 MHz interval for IL and ripple)
- Insertion loss
- 2.0 dB typ. / 4.0 dB max.
- Amplitude ripple
- 1.8 dB typ. / 2.2 dB max.
- Operating temperature
- −30 to +85 °C
- Source / load test termination
- 50 Ω / 50 Ω
SAW Filter · 267.5 MHz
FSF-5050-267M5
267.5 MHz
Specified passband: 260–275 MHz (15 MHz interval for IL and ripple)
- Insertion loss
- 3.2 dB typ. / 5.0 dB max.
- Amplitude ripple
- 1.4 dB typ. / 3.0 dB max.
- Operating temperature
- −10 to +50 °C
- Source / load test termination
- 50 Ω / 50 Ω; 50 Ω ∥ 0 pF measurement model
SAW Filter · 268 MHz
FSF-5050-268M
268 MHz
Specified passband: 266–270 MHz (4 MHz interval for IL and ripple)
- Insertion loss
- 1.75 dB typ. / 3.0 dB max.
- Amplitude ripple
- 0.75 dB typ. / 2.0 dB max.
- Operating temperature
- −10 to +50 °C
- Source / load test termination
- 50 Ω / 50 Ω
3 dB bandwidth: — (not specified). The 4, 8 and 15 MHz spans above are specified passband intervals, not measured 3 dB bandwidths. A shared package or equal interval width does not establish interchangeability.
Six Key Selection Parameters
Electrical specifications
Use each model’s passband when reading its insertion loss and amplitude ripple. Complete stopband limits and further conditions remain in the combined product document.
Scroll horizontally to view all columns.
FSF-5050-262M
| Parameter | Min. | Typ. | Max. | Unit | Definition / condition |
|---|---|---|---|---|---|
| Center frequency | — | 262 | — | MHz | Stated value, not a frequency-tolerance limit. |
| Specified passband for IL and ripple | 260–264 | MHz | 4 MHz interval. Endpoints are range boundaries, not Min./Max. limits. | ||
| Insertion loss | — | 1.8 | 3.0 | dB | Over 260–264 MHz with 50 Ω source/load. |
| Amplitude ripple | — | 0.7 | 2.0 | dB | Over 260–264 MHz with 50 Ω source/load. |
| Operating temperature | −40 | — | +85 | °C | Operating range. Electrical test temperature not stated. |
| Source / load test termination | 50 / 50 | Ω | Measurement conditions. No external matching components shown. | ||
FSF-5050-265M
| Parameter | Min. | Typ. | Max. | Unit | Definition / condition |
|---|---|---|---|---|---|
| Center frequency | — | 265 | — | MHz | Stated value, not a frequency-tolerance limit. |
| Specified passband for IL and ripple | 261–269 | MHz | 8 MHz interval. Endpoints are range boundaries, not Min./Max. limits. | ||
| Insertion loss | — | 2.0 | 4.0 | dB | Over 261–269 MHz with 50 Ω source/load. |
| Amplitude ripple | — | 1.8 | 2.2 | dB | Over 261–269 MHz with 50 Ω source/load. |
| Operating temperature | −30 | — | +85 | °C | Operating range. Electrical test temperature not stated. |
| Source / load test termination | 50 / 50 | Ω | Measurement conditions. No external matching components shown. | ||
FSF-5050-267M5
| Parameter | Min. | Typ. | Max. | Unit | Definition / condition |
|---|---|---|---|---|---|
| Center frequency | — | 267.5 | — | MHz | Stated value, not a frequency-tolerance limit. |
| Specified passband for IL and ripple | 260–275 | MHz | 15 MHz interval. Endpoints are range boundaries, not Min./Max. limits. | ||
| Insertion loss | — | 3.2 | 5.0 | dB | Over 260–275 MHz with 50 Ω source/load and 50 Ω ∥ 0 pF measurement model. |
| Amplitude ripple | — | 1.4 | 3.0 | dB | Over 260–275 MHz with 50 Ω source/load and 50 Ω ∥ 0 pF measurement model. |
| Operating temperature | −10 | — | +50 | °C | Operating range. Electrical test temperature not stated. |
| Source / load test termination | 50 / 50 | Ω | Also specified as 50 Ω ∥ 0 pF measurement model. Model entry, not zero physical capacitance. | ||
FSF-5050-268M
| Parameter | Min. | Typ. | Max. | Unit | Definition / condition |
|---|---|---|---|---|---|
| Center frequency | — | 268 | — | MHz | Stated value, not a frequency-tolerance limit. |
| Specified passband for IL and ripple | 266–270 | MHz | 4 MHz interval. Endpoints are range boundaries, not Min./Max. limits. | ||
| Insertion loss | — | 1.75 | 3.0 | dB | Over 266–270 MHz with 50 Ω source/load. |
| Amplitude ripple | — | 0.75 | 2.0 | dB | Over 266–270 MHz with 50 Ω source/load. |
| Operating temperature | −10 | — | +50 | °C | Operating range. Electrical test temperature not stated. |
| Source / load test termination | 50 / 50 | Ω | Measurement conditions. No external matching components shown. | ||
Center frequencies are the stated values, not frequency-tolerance limits. The electrical-characteristic test temperature is not stated in the supplied document. Operating ranges do not make every typical value a guaranteed limit throughout that range. “—” means not specified.
All four models specify stopband attenuation relative to 0 dB, but the frequency intervals and limits differ. Use the selected model’s limits at your system’s blocker frequencies.
Typical Applications
Select the wanted band in your receiver
VHF receiver filtering
Align the selected center frequency and specified passband with the receiver’s wanted-signal band.
RF front-end signal selection
Assess wanted-signal loss and out-of-band rejection using the model’s stated frequency intervals.
Superheterodyne IF stages
Evaluate the selected filter between the actual preceding and following IF stages, including their source and load conditions.
Functional application example only. This is not a validated schematic, pin-routing diagram or measured frequency response.
Integration Notes
Check the interface and operating limits
Source, load and PCB conditions
Use the specified 50 Ω source and load measurement conditions as the evaluation reference. Check the actual circuit impedances and PCB fixture.
For 262M, 265M and 268M, no external matching components are shown in the supplied measurement description. This does not establish a universal match to every circuit.
For 267M5, retain the stated 50 Ω ∥ 0 pF measurement model when interpreting the data; confirm the actual interface in your design.
Model-specific limits
Maximum RF input power is 10 dBm for all four models.
Maximum DC voltage is 3 V for 262M and 268M, and 5 V for 265M and 267M5.
Check the operating temperature for the selected model. The 265M storage range of −55 to +85 °C is not its operating range.
Maximum ratings are limits, not recommended operating targets.
Package & Pin Assignment
5.0 × 5.0 mm SMD package
Shared package format for all four FSF-5050 262M, 265M, 267M5 and 268M models.
5.0 × 5.0 mm · 1.5 mm maximum height · 8-pad SMD
These dimensions and pin functions appear on all four FCom pages. Confirm pad orientation, signal routing and the applicable footprint before PCB release. The function table does not assign an unverified drawing orientation.
For other pin configurations, contact FCom to discuss the requirement.
| Pin(s) | Function |
|---|---|
| 2 | Input / Output |
| 6 | Input / Output |
| 1, 3, 5, 7 | Ground |
| 4, 8 | Case Ground |
Selection and Design-In Support
Share your frequency plan and interface requirements
Include the chosen model, passband endpoints, bandwidth definition, source/load requirements and operating temperature. Add sample quantity, estimated usage and any blocker-frequency targets so the inquiry addresses your actual design.
Confirm the complete ordering code and applicable specification with FCom before ordering.
Engineering Questions
Frequently asked questions
Are the 4, 8 and 15 MHz spans specified 3 dB bandwidths?
No. These spans describe the frequency intervals over which insertion loss and amplitude ripple are specified. The supplied FCom document does not specify a 3 dB bandwidth for any of the four models. Keep the passband endpoints and the bandwidth definition with every selection.
Which model has the widest specified passband interval?
FSF-5050-267M5 specifies insertion loss and ripple over 260–275 MHz, a 15 MHz interval. Its insertion loss is 3.2 dB typical / 5.0 dB maximum and its operating range is −10 to +50 °C. This interval alone does not establish suitability for a particular signal or modulation.
Do all four models cover −40 to +85 °C operation?
No. FSF-5050-262M is specified for −40 to +85 °C; FSF-5050-265M for −30 to +85 °C; and FSF-5050-267M5 and FSF-5050-268M for −10 to +50 °C. Storage temperature limits are separate from operating limits.
Does the 50 Ω test circuit remove the need to assess the interface?
No. The document uses 50 Ω source and load measurement conditions. For 267M5, it also states a 50 Ω in parallel with 0 pF input/output measurement model. Evaluate the actual source, load and PCB conditions; a model entry or a circuit without drawn matching components does not guarantee a universal match.
Are 262M and 268M interchangeable because both specify a 4 MHz interval?
No direct interchangeability is established. Their passbands are 260–264 MHz and 266–270 MHz, respectively, and their operating temperature ranges differ. Confirm the center frequency, full electrical limits, pin orientation and PCB interface before considering substitution.
What information should I send for selection and ordering?
Provide the selected model or center frequency, passband endpoints and bandwidth definition, source/load requirements, operating temperature, sample quantity and estimated usage. Include blocker frequencies and rejection targets if relevant. Confirm the complete ordering code and applicable specification with FCom before ordering.