FCX-5M Seam-Sealed SMD Crystal 8–54MHz for IoT
5.0×3.2mm SMD | Frequency Control
FEATURE
Product Description
FCX-5M Seam-Sealed SMD Quartz Crystal Resonator
Built for communication modules, IoT gateways, and test equipment that need predictable start-up margin and stable timing across temperature. The seam-sealed construction improves robustness against environmental stress, supporting harsher operating profiles.
Package
5.0×3.2×0.90 mm (SMD)
Nominal Frequency
8–54 MHz
Tolerance
±10 ppm @ 25°C ±3°C
Operating Temperature
-40°C to +125°C
Test conditions suggestion (typical): ambient temperature 25 ± 5°C; relative humidity 40%–70%.
Key Specs
Quick checklist for RFQs: frequency, CL, tolerance, stability tier (temp range), and packaging (tape & reel). Suggested test conditions: 25 ± 5°C, RH 40%–70%.
Construction
Seam sealed (enhanced robustness)
CL Options
6 pF / 10 pF / 18 pF
Drive Level
10–200 µW
Aging
±3 ppm (1st year)
Key Features
- Large format 5.0×3.2 mm (5032) seam sealed SMD package, thickness 0.90 mm
- Nominal frequency range: 8–54 MHz
- Frequency tolerance: ±10 ppm @ 25°C ±3°C
- Frequency stability options: ±15 / ±30 / ±80 ppm across -40°C to +85 / +105 / +125°C
- ESR tiers to support oscillator start-up margin across bands
- RoHS & REACH compliant, Pb-free
- Excellent heat resistance and environmental characteristics
Applications
Where FCX-5M fits: designs that need a MHz crystal with predictable loop-gain margin under temperature, shipping/handling stress, and long-term aging constraints.
- Communication equipment: stable channel timing and reference clocks for modems and radios
- Wireless modules: better start-up behavior with banded ESR limits for common oscillator loops
- IoT gateways: robust timing under wider operating profiles
- Test & measurement: tight tolerance and aging for repeatability
- PCMCIA / interface modules: compact 5032 footprint for embedded designs
Detailed Specifications
Values shown are common specifications. For customized requirements, contact sales.
| Parameter | Symbol | Min | Typ | Max | Unit | Notes |
|---|---|---|---|---|---|---|
| Nominal Frequency | F | 8 | — | 54 | MHz | — |
| Frequency Tolerance | FT | — | ±10 | — | ppm | @ 25°C ±3°C |
| Frequency Stability over Operating Temp. (ref 25°C) | ST | — | ±15 @ -40 to +85°C ±30 @ -40 to +105°C ±80 @ -40 to +125°C |
— | ppm | — |
| Operating Temperature | Topr | -40 | 25 | 125 | °C | — |
| Load Capacitance | CL | — | 6, 10, 18 or specify | — | pF | — |
| Drive Level | DL | — | 10 | 200 | µW | — |
| Equivalent Series Resistance | ESR | — | — | 80 (8–19.999 MHz) 60 (20–25.999 MHz) 40 (> 26 MHz) |
Ω | — |
| Aging (1st year) | — | — | ±3 | — | ppm | — |
Measurement conditions: ambient temperature 25 ± 5°C; relative humidity 40%–70%.
Ordering Code / Options
For an accurate build recommendation (and to avoid start-up issues), share your oscillator load network and target negative-resistance margin, especially at the cold/low-voltage corner.
- Frequency: 8–54 MHz (specify exact frequency)
- Load Capacitance (CL): 6 pF / 10 pF / 18 pF (or custom)
- Tolerance: ±10 ppm @ 25°C (options on request)
- Stability tier / temperature range: up to -40°C to +125°C
- Packaging: tape & reel (typical) or per request
- Screening / reports: AQL, reliability, or compliance support upon request
Selection Path / Upgrade Options
Documents & Downloads
Datasheet
Use the datasheet to confirm CL, ESR band, and drive constraints before final oscillator validation.
Need a faster quote? Email your target frequency + CL + temperature range + quantity to FCom@fujicrystal.com.
Package Drawing (5032)
Confirm land pattern and assembly keep-outs during PCB footprint design. If you need the recommended pad layout or stencil guidance, request application support.
Why Choose FCX-5M?
- Improved robustness for harsher environments due to seam sealed construction
- Clear stability tiers to match product operating temperature targets
- ESR segmentation supports oscillator start-up margin across frequency bands
- Suitable for communication, IoT and test equipment timing references
- Custom frequency, load capacitance and screening options available on request
Site Links (Family / Applications / Knowledge)
Tip: When selecting a crystal for an MCU/SoC, verify your oscillator negative resistance margin against the worst-case ESR for your frequency band and temperature tier.
Frequently Asked Questions
Is FCX-5M suitable for precision test instruments?
Yes. The FCX-5M supports tight tolerance (±10 ppm @ 25°C ±3°C) and low aging (±3 ppm, 1st year), making it a practical timing reference for precision test and measurement equipment.
What is the ESR performance across different frequency bands?
ESR is specified as 80 Ω for 8–19.999 MHz, 60 Ω for 20–25.999 MHz, and 40 Ω for frequencies above 26 MHz. This banding helps align crystal choice with oscillator start-up margin and loop gain.
Do you offer samples and volume production?
Yes. We support samples, volume production, and project-based customization depending on frequency, CL, screening and order quantity. Email your target specs and quantity to FCom@fujicrystal.com for an RFQ.
What information should I provide for an RFQ (no online pricing)?
Please include frequency, load capacitance (CL), tolerance, operating temperature range/stability tier, drive level constraints, packaging (tape & reel), quantity, and any screening/test-report requirements. We will quote based on your exact configuration.
Can you customize frequency, CL, or screening?
Yes. Custom frequency, CL, stability tiers, and screening options can be evaluated based on feasibility and volume. If you share your oscillator conditions and target margins, our applications team can recommend the safest spec point.
What about MOQ and lead time?
MOQ and lead time vary by frequency, stability tier, screening, and order size. We support both sampling and production scheduling—contact us with your target specs and quantity to confirm current availability.
Order & Inquiry
To request FCX-5M samples or pricing, contact FCom@fujicrystal.com or browse the full product catalog.
Technical support: if you share your MCU/SoC part number and oscillator topology, we can help validate CL/ESR/drive margin and recommend safer spec points. See Contact for applications engineering support.
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