FSF-5050-280M~285M IF SAW Filter Family

5.0×5.0 mm SMD | 280 MHz / 285 MHz Center Frequency

FSF-5050-280M~285M is FCom Fuji Crystal's IF SAW filter family covering 280 MHz and 285 MHz center frequencies. Based on a 5.0×5.0 mm SM5050-8 package, these IF SAW filters offer 8–12 MHz 3 dB bandwidth, low insertion loss and high stopband attenuation, making them suitable for wireless microphone receivers, audio links and IF stages.

Designed for 50 Ω systems, this IF SAW filter family can be matched with external LC networks to tune passband flatness and stopband attenuation. It is a practical choice when your IF chain needs stable selectivity without excessive insertion loss.

Center frequency: 280 / 285 MHz Package: 5.0×5.0 mm SMD 3 dB bandwidth: ~8–12 MHz Use: IF filtering / RF front ends

FSF-5050-280M~285M IF SAW filter family, 5×5mm (SM5050-8), 280/285MHz

Key Features

Built for professional wireless receiver IF chains and general RF front ends where selectivity, insertion loss, and board-level integration constraints must be balanced.

Target systems / typical use

Wireless microphone receivers · Professional audio RF links · IF stages

IF selectivity for superheterodyne architectures
Interference suppression around the 280–285 MHz IF band
Compact SMT footprint for dense receiver boards

Typical placement: after the mixer and before IF amplification / demodulation stages.

Performance and integration

5.0×5.0mm SMD · Low loss · Strong rejection

Center frequencies: 280 MHz and 285 MHz
3 dB bandwidth: approximately 8–12 MHz
Designed for 50 Ω test environment with external LC matching
SMT-compatible for standard reflow processes

Best results come from optimizing the matching network for your PCB stack-up and IF chain.

Matching / impedance notes

LC matching strongly influences ripple and rejection

Keep traces short and symmetric to reduce parasitics
Use a solid ground reference and via stitching near the package
Validate response (S21) on the final PCB, not only in simulation
ESD and handling: follow RF layout and grounding best practices

Ask for typical response plots and matching guidance for faster bring-up.

Key Specs (Quick View)

Quick comparison for part shortlisting. Test condition note: key parameters are characterized in 50 Ω with external LC matching; final ripple and rejection depend on your matching network and PCB parasitics.

FSF-5050-280M

280 MHz IF SAW Filter · 5.0×5.0 mm

Center frequency: 280 MHz
3 dB bandwidth: ~8–12.5 MHz
Insertion loss: typ. ~3.0 dB; max. ~4.5 dB (Fc ± 4 MHz)
Use case: wireless mic IF chains and IF stages

Datasheet download is provided in the Documents section.

FSF-5050-285M

285 MHz IF SAW Filter · 5.0×5.0 mm

Center frequency: 285 MHz
3 dB bandwidth: ~8–12 MHz
Insertion loss: typ. ~2.5 dB; max. ~4.5 dB (Fc ± 4 MHz)
Use case: wideband receivers and RF front ends

Product Family Members

The FSF-5050-280M~285M IF SAW filter family currently includes two center frequencies. You can choose the right part based on system IF frequency and required bandwidth. The summary below highlights key features; full matching circuits and frequency responses are available from FCom Fuji Crystal upon request.

FSF-5050-280M

280 MHz IF SAW Filter · 5.0×5.0 mm

Center frequency: 280 MHz
3 dB bandwidth: approx. 8–12.5 MHz (Fc ± ~4–6 MHz)
Insertion loss: typ. ~3 dB, max. ~4.5 dB (over Fc ± 4 MHz passband region)
Passband ripple: typ. ≤0.8 dB, helping maintain a flat IF SAW filter response
System impedance: characterized in 50 Ω; external LC matching required
Operating temperature: approx. –20 °C to +70 °C
Package: 5.0×5.0 mm SMD (SM5050-8 pad layout)

Recommended use: 280 MHz IF SAW filter for wireless microphone receivers, professional audio transmission systems and similar IF stages.

FSF-5050-285M

285 MHz IF SAW Filter · 5.0×5.0 mm

Center frequency: 285 MHz
3 dB bandwidth: approx. 8–12 MHz for wider IF signals
Insertion loss: typ. ~2.5 dB, max. ~4.5 dB (over Fc ± 4 MHz passband region)
Passband ripple: typ. ≤1.2 dB, max. ~2 dB
Test impedance: 50 Ω with external inductors and capacitors for matching
Operating temperature: approx. –20 °C to +70 °C
Package: 5.0×5.0 mm SMD, suitable for standard SMT reflow processes

Recommended use: 285 MHz IF SAW filter for wideband receivers and professional wireless RF front ends.

Detailed Specifications (Typical)

The table below compares key parameters of the FSF-5050-280M and FSF-5050-285M IF SAW filters. Use it as a quick reference to check IF frequency, bandwidth and stopband requirements. For final designs, we recommend combining the datasheet matching network with bench measurements of the SAW filter frequency response.

Parameter	Conditions	FSF-5050-280M	FSF-5050-285M
Center frequency Fc	—	280 MHz	285 MHz
3 dB bandwidth BW_3dB	Relative to Fc	Approx. 8–12.5 MHz	Approx. 8–12 MHz
Insertion loss IL	Fc ± 4 MHz	Typ. ~3.0 dB; Max. ~4.5 dB	Typ. ~2.5 dB; Max. ~4.5 dB
Passband ripple	Fc ± 4 MHz	Typ. ≤0.8 dB	Typ. ≤1.2 dB; Max. ~2 dB
System impedance	Test environment	50 Ω with external LC matching	50 Ω with external LC matching
Package size	—	5.0×5.0 mm SMD (SM5050-8)
Operating temperature	—	Approx. –20 °C to +70 °C

Applications and Design Guidelines

Typical Application Scenarios

IF SAW filter for professional wireless microphone receivers
IF filtering in superheterodyne receiver architectures
Interference suppression in wireless modules and RF front ends
RF equipment needing sharp selectivity around the 280–285 MHz IF band

Why these specs matter (practical view)

Bandwidth (~8–12 MHz) supports typical IF channel widths while retaining selectivity
Low insertion loss helps preserve IF chain noise figure and headroom
Strong stopband attenuation reduces adjacent interference and intermod risk
5.0×5.0mm footprint keeps RF layout compact and repeatable across designs

Design and Matching Recommendations

Use appropriate series inductors and shunt capacitors to match the IF SAW filter to a 50 Ω system.
Passband and stopband performance are strongly influenced by the matching network; fine-tune LC values via simulation and lab measurements.
Keep PCB traces around the SAW filter short and symmetrical to minimize parasitics.
In sensitive RF front ends, use a solid ground plane and good grounding practices to reduce noise coupling.

Ordering Code / Options

Select the part number by IF center frequency. If you have a fixed IF plan, choose the matching Fc (280 MHz or 285 MHz). For special requirements (bandwidth, rejection, ripple target), share your target mask and we will review customization options.

Ordering codes

Frequency options within this family

FSF-5050-280M — 280 MHz IF SAW bandpass filter
FSF-5050-285M — 285 MHz IF SAW bandpass filter

If you are unsure which one fits your receiver plan, share your IF frequency and channel bandwidth.

Selection Path / Upgrade Options

Same 5.0×5.0mm footprint families for adjacent IF plans

FSF-5050-230M~234M — lower IF options in 230–234 MHz range
FSF-5050-262M~268M — nearby IF range for alternative plans
FSF-5050-291M4 — single-frequency option near 291.4 MHz
FSF-5050-309M~319M5 — higher IF options for wideband designs

For a broader overview, use the SAW Filters product family entry and the engineering guide linked above.

Documents and Downloads

Datasheets and package information for quick evaluation and integration. For additional materials (typical response plots, matching examples, and measurement notes), contact us via the RFQ page.

Datasheets

FSF-5050-280M Datasheet (PDF)
FSF-5050-285M Datasheet (PDF)
Contact and RFQ: https://www.fujicrystal.com/contact.html

Engineering note: IF SAW filter response is sensitive to matching and PCB parasitics.

Use the datasheet-recommended matching as a baseline
Validate S-parameters (S21) on the final PCB stack-up
Request typical plots and matching suggestions for faster tuning

Package outline (SM5050-8)

FSF-5050-280M~285M IF SAW filter package outline, 5×5mm (SM5050-8)

If you need pad recommendations for a specific PCB process, contact technical support.

FAQ

B2B procurement and engineering questions.

Do you publish pricing for FSF-5050-280M / FSF-5050-285M?

We do not list public prices on the page. For a quotation, please send your target part number, quantity, and destination; we will provide an RFQ based on your supply scenario (samples, pilot, or volume).

What is the MOQ for this IF SAW filter family?

MOQ depends on the specific part number and your procurement stage (samples vs. volume). Contact us with FSF-5050-280M or FSF-5050-285M and your expected annual volume to confirm the MOQ.

What is the typical lead time?

Lead time varies by part number, order quantity, and current capacity. Share your requested delivery date and order quantity; we will confirm the best available schedule for samples and production.

Can I request samples and evaluation support?

Yes. We support sampling and pilot builds, and can provide matching guidance and typical response plots for your 50 Ω IF chain.

Do you support customization (frequency, bandwidth, or matching targets)?

Yes. If you need a different IF center frequency, bandwidth, or stopband target in a similar 5.0×5.0mm footprint, share your requirements and we can review feasibility.

Are packaging details and test reports available?

Packaging outline and datasheets are provided on this page. Additional documentation such as test conditions and typical measurement notes can be supplied upon request.

Technical support and compliance

Technical support entry: Contact engineering support
ISO 9001: Certification reference
ISO 14001: Certification reference

FSF-5050-280M~285M IF SAW Filter Family

5.0×5.0 mm SMD | 280 MHz / 285 MHz Center Frequency

Key Features

Target systems / typical use

Performance and integration

Matching / impedance notes

Key Specs (Quick View)

FSF-5050-280M

FSF-5050-285M

Product Family Members

FSF-5050-280M

FSF-5050-285M

Detailed Specifications (Typical)

Applications and Design Guidelines

Typical Application Scenarios

Why these specs matter (practical view)

Design and Matching Recommendations

Further Reading

Ordering Code / Options

Ordering codes

Selection Path / Upgrade Options

Documents and Downloads

Datasheets

Package outline (SM5050-8)

FAQ

Other 5.0×5.0 mm IF SAW Filter Series