FSF-5050-554M IF SAW Filter

Q: Are wider-temperature or higher-reliability versions possible?

Yes. If you require extended temperature range or enhanced environmental reliability, FCom can evaluate customized specifications based on the FSF-5050 platform.

FSF-5050 Series · IF SAW Filter (Sub-GHz Receiver Chains)

FSF-5050-554M is FCom Fuji Crystal’s 554 MHz sub-GHz IF SAW filter built on the FSF-5050 platform with a 5.0×5.0mm SMD package. It targets receiver preselection and IF filtering in private radio, industrial telemetry and sub-GHz modules, with a focus on stable passband control, robust out-of-band rejection and reliable production consistency.

554 MHz 5.0×5.0mm SMD Sub-GHz Front End Mass-Production Consistency

FSF-5050-554M IF SAW filter, 554MHz, 5.0×5.0mm SMD

Key Features

Stable passband control

Designed to keep IF filtering behavior consistent across production for predictable receiver tuning.

Strong out-of-band rejection

Helps suppress blockers and coexistence energy to protect LNA/mixer dynamic range in dense RF environments.

Compact 5.0×5.0mm SMD

Space-efficient footprint for sub-GHz modules and base-side equipment.

Qualification-friendly platform

FSF-5050 series consistency supports multi-band roadmaps and supply-chain flexibility.

Target systems: private/licensed radio receivers, industrial telemetry links, sub-GHz gateway/base-side equipment. Typical IF placement: super-heterodyne/low-IF receiver blocks where an IF SAW filter helps control adjacent-channel and blocker energy.

Key Specs

Platform FSF-5050 IF SAW Series

Center Frequency 554 MHz

Package 5.0×5.0 mm SMD

Test-condition note: typical electrical performance is measured on 50 Ω fixtures and depends on the exact variant and external matching network. Confirm passband/BW/IL/rejection/group-delay targets against the official datasheet and your system mask.

Passband, insertion loss, rejection and temperature options may vary by model and customization scope. For system-level matching and final targets, please contact FCom for official specifications and evaluation support.

Detailed Specifications

Model Positioning

FCom Part Number	Center Frequency	Package	Value for Your Receiver Chain
FSF-5050-554M	554 MHz	5.0×5.0mm SMD	Provides stable IF passband control and dependable out-of-band interference suppression for 554 MHz sub-GHz receiver front ends, while supporting modular design, efficient qualification and supply-chain flexibility.

Specification checklist (confirm by datasheet)

Parameter	Why it matters	What to confirm
3 dB bandwidth / passband shape	Defines adjacent-channel selectivity and demodulation margin.	Target BW, ripple, and channel spacing for your IF plan.
Insertion loss (IL)	Directly impacts sensitivity budget and NF margin.	IL at center + across temperature; matching impact.
Stopband attenuation / rejection mask	Controls blocker leakage and mixer/LNA intermod stress.	Attenuation at key blocker offsets and mirror frequencies.
Group delay / flatness	Impacts distortion-sensitive modulation and equalization effort.	GD variation over passband for your waveform.
Impedance and matching	Affects IL/rejection and real PCB performance.	50 Ω environment, recommended matching topology/values.

Applications

Industrial telemetry and data backhaul (blocker resilience and stable filtering)
Private radio and dedicated wireless receivers (adjacent-channel control)
Sub-GHz module preselection and IF filtering (compact footprint)
Remote monitoring, control and security systems (coexistence robustness)
High-reliability IoT gateways and base-side equipment (repeatable production behavior)
Coexistence interference suppression in multi-band front ends (rejection where it matters)

Why these specs matter: sub-GHz systems commonly face strong in-band neighbors and out-of-band blockers. A well-placed IF SAW filter can reduce unwanted energy before sensitive stages, improving real-world sensitivity and stability under coexistence conditions.

Selection Guidance, Typical IF Placement, and Matching Notes

Typical IF placement

Common placements include: (1) after the mixer to suppress image/LO-related products and blockers at the IF node, or (2) in an IF chain before the main IF amp/ADC to improve selectivity and protect downstream dynamic range. Share your block diagram and frequency plan to confirm the best node.

1. Start with your IF and bandwidth strategy

Align the FSF-5050-554M selection with your receiver architecture (superheterodyne, low-IF, etc.). Define the target bandwidth, adjacent channel spacing and LO planning around the 554 MHz IF node to optimize the tradeoff between insertion loss and rejection.

2. Protect downstream dynamic range with solid rejection

Strong interferers and coexistence signals in sub-GHz systems can raise intermodulation risk in LNAs and mixers. An IF SAW filter placed at the right node helps control unwanted energy and improves sensitivity and overall receiver robustness.

3. Layout, grounding and impedance matching

Follow 50 Ω design fundamentals with short traces, continuous ground return paths and minimal unnecessary vias. If further optimization is required, implement matching components using FCom-recommended values to refine insertion loss and passband shape.

Ordering Code and Options

Item	Options / Notes
Ordering code	FSF-5050-554M (FSF-5050 series, 5.0×5.0mm SMD, 554 MHz center frequency)
Frequency points	Adjacent-band and roadmap variants are available across the FSF-5050 family. Confirm your IF plan and blocker mask to select the best center frequency.
Temperature grade	Depends on variant and program requirements. Wider-temperature and higher-reliability options can be evaluated on request.
Customization	Passband/rejection/group delay targets can be assessed based on the FSF-5050 platform and your acceptance criteria.

Selection Path / Upgrade Options

If you need adjacent-band choices or multi-band planning, these related pages are common starting points: FSF-5050-480M, FSF-5050-499M / 499M25, FSF-5050-584M, FSF-5050-604M5–609M9, FSF-5050-611M–618M25, FSF-5050-500M / 504M.

Family entry: FSF-5050 SAW Filters (5.0×5.0mm) — Family Hub (band directory, variant catalog, matching/layout notes).

Documents and Downloads

Package drawing (reference)

Use this outline for early layout planning; confirm the latest drawing version during ordering.

FSF-5050-554M IF SAW filter package drawing, 5.0×5.0mm SMD

Datasheet and test data

For the latest datasheet, recommended matching values, and available measurement reports, please contact: Fcom@fujicrystal.com.

ISO certifications: ISO9001, ISO14001.

FAQ

What is the primary value of the FSF-5050-554M in sub-GHz systems?

It provides stable IF filtering at 554 MHz with dependable passband control and out-of-band suppression, especially beneficial for modules and receivers that prioritize coexistence robustness and consistent high-volume performance.

Can it be used for preselection in my front end?

It depends on your architecture. When 554 MHz is a key front-end or IF node, an IF SAW filter can provide out-of-band protection at the designated stage. Sharing your block diagram and frequency plan will help us recommend the best implementation.

What should I provide to accelerate evaluation and qualification?

Provide your receiver block diagram, IF frequency/bandwidth, LO plan, adjacent-channel spacing and target metrics (insertion loss, rejection, group delay, ripple). This helps FCom match the closest existing variant or define a streamlined customization path.

Are wider-temperature or higher-reliability versions possible?

Yes. If your application requires extended temperature range or more stringent environmental targets, FCom can evaluate enhanced specifications based on the FSF-5050 platform.

Do you publish pricing online?

No. Pricing is quote-based for B2B programs. Submit an RFQ (application + target specs + quantity) and we will return a formal quotation and lead-time confirmation.

What are typical MOQ and lead time?

MOQ and lead time depend on the variant, qualification status and order quantity. Samples are available for evaluation, and volume supply is supported after confirmation of specifications and schedule.

Can I request samples, packaging details and test reports?

Yes. You can request samples, packing format information and available measurement reports/CoC based on your program needs. Contact FCom with your IF plan and acceptance criteria.

Do you support customization (passband/rejection/group delay)?

Yes. If your application needs specific targets for passband shape, rejection mask, group delay or environmental performance, FCom can assess customization options based on the FSF-5050 platform.

Request RFQ, samples, or a specification review

Contact FCom Fuji Crystal for model recommendations, sample support and system-level evaluation for 554 MHz sub-GHz receiver designs. We can also assess tailored targets for passband, rejection, group delay and operating environment based on your architecture.

Request RFQ (Email) Contact Browse FSF-5050 Family

Include in your RFQ: IF frequency plan, target bandwidth, blocker offsets, required rejection mask, temperature range, and expected annual volume.

Technical support: Fcom@fujicrystal.com · Tel: +852-36458129 · Follow us: Twitter | LinkedIn