FCX-7M 7050 Seam-Sealed SMD Crystal 6–48MHz
7.0×5.0mm SMD | High Stability Crystal
FEATURE
Product Description
FCX-7M Quartz Crystal Resonator
The FCX-7M is a seam-sealed SMD quartz crystal resonator in a compact 7050 (7.0×5.0mm) package. It is designed for high precision and robust environmental performance in communication equipment, IoT devices, wireless modules, and test & measurement instruments.
Test condition note: unless otherwise specified, common verification uses ambient 25 ± 5°C and RH 40%–70%.
Key Features
- Extremely small SMD type crystal units (7.0×5.0mm)
- High precision and high frequency stability
- Excellent heat resistance and environmental characteristics
- Designed for automatic mounting and reflow soldering
- RoHS and REACH compliant, Pb-free
Typical Applications
- Communication equipment
- IoT devices, gateways and smart sensors
- RF & wireless modules
- Test and measurement instruments
Applications & Design Fit
Wireless Modules & IoT Gateways
In RF modules and IoT gateways, the crystal reference directly impacts frequency accuracy, channel spacing margin, and long-term stability. FCX-7M targets the common 6–48 MHz reference range with stable options up to -40°C to +125°C for harsher field deployments.
Communication Equipment
Seam-sealed construction improves robustness against humidity and environmental stress, supporting consistent start-up behavior and reducing drift risk in long-running network and industrial communication nodes.
Test & Measurement Instruments
For instrumentation, predictable tolerance/stability and frequency-banded ESR constraints help maintain oscillator start-up margin and repeatability across production batches and temperature extremes.
Electrical Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Notes |
|---|---|---|---|---|---|---|
| Nominal Frequency | F | – | 6–48 | – | MHz | Common specification |
| Frequency Tolerance | FT | – | ±10 | – | ppm | @25°C ±3°C |
| Frequency Stability Over Operating Temp. Range (Reference 25°C) | ST | – | ±15 | – | ppm | @-40~85°C |
| – | ±30 | – | ppm | @-40~105°C | ||
| – | ±80 | – | ppm | @-40~125°C | ||
| Operating Temperature | Topr | -40 | 25 | 125 | °C | Industrial grade |
| Load Capacitance | CL | – | 8 / 12 / 18 or specify | – | pF | Custom CL available |
| Drive Level | DL | – | 10 | 100 | µW | Keep within limits for reliability |
| Equivalent Series Resistance | ESR | – | – | 100 | Ω | 6–8 MHz |
| – | – | 80 | Ω | 8–48 MHz | ||
| Aging | – | – | ±3 | – | ppm | 1st year |
Test condition: ambient temperature 25 ± 5°C, relative humidity 40%–70%. The table shows common specifications. For special requirements (frequency, CL, tighter tolerance/stability), please contact FCom.
Package & Dimensions
- Package size: 7.0 ± 0.2 mm × 5.0 ± 0.2 mm (7050)
- Height: 1.1 mm max
- 4-pad connection (see drawing for pin orientation and land pattern)
- Recommended for automatic placement and reflow soldering
Why Choose FCX-7M?
- Optimized for communication systems and RF modules requiring 6–48 MHz reference clocks
- Seam-sealed structure for strong environmental robustness
- Frequency-banded ESR limits (6–8 MHz / 8–48 MHz) to support reliable oscillator start-up margin
- Flexible options: frequency, load capacitance and stability grades
Ordering Code & Options
For an accurate RFQ and lead time, please provide your target parameters. FCX-7M supports samples, pilot runs and volume production, with customization available for key electrical limits.
Specify When Requesting a Quote
- Frequency (MHz) within 6–48 MHz
- Load capacitance (CL): 8 pF / 12 pF / 18 pF or custom
- Tolerance at 25°C (typ. ±10 ppm; tighter upon evaluation)
- Stability grade: ±15 / ±30 / ±80 ppm by temperature range
- Operating temperature: -40~85°C / -40~105°C / -40~125°C
- Screening / reliability: aging limits, special tests, packaging requirements
Selection Path / Upgrade Options
If you’re balancing size, frequency margin and assembly constraints, compare adjacent package families:
FCX-2S (2.0×1.6mm) — footprint-driven designs
FCX-3M (3.2×2.5mm) — compact mainstream modules
FCX-5M (5.0×3.2mm) — size/performance trade-off
Selection Guides & Engineering Notes
Resonator Fundamentals (News)
- Frequency Crystal Science: key concepts for designers
- What Is Resonant Frequency? Practical interpretation
- Quartz Frequency Guide: planning frequency points
- Quartz Crystal Frequency Ranges: selection boundaries
Application Guides
- SMD Quartz Crystal for MCU/SoC clocks: selection & layout
- RTC 32.768 kHz crystal selection for industrial/automotive/medical
- Using a 16 MHz crystal with MCU internal oscillator circuits
Need circuit-level help (drive level margin, CL tuning, start-up, EMI/ESR headroom)? Use the technical support contact and include your MCU/SoC part number, target frequency and load network.
Documents & Downloads
Download the FCX-7M datasheet for complete electrical limits, packaging information and application notes. If you require qualification documents, packaging spec, or test reports for production release, contact us.
Compare Other Quartz Resonators
FCX-2S: 2.0×1.6 mm Resonator FCX-5M: 5.0×3.2 mm Resonator FCX-3M: 3.2×2.5 mm ResonatorFrequently Asked Questions
What frequency range does FCX-7M support?
FCX-7M supports a nominal frequency range of 6–48 MHz.
What is the frequency tolerance at 25°C?
The standard frequency tolerance is ±10 ppm at 25°C with a ±3°C reference condition.
What stability options are available over temperature?
Stability options (reference 25°C) include ±15 ppm over -40~85°C, ±30 ppm over -40~105°C, and ±80 ppm over -40~125°C.
What load capacitance options are available?
Standard CL options include 8 pF, 12 pF and 18 pF. Custom CL can be specified for your oscillator design.
Is FCX-7M suitable for RF test equipment?
Yes. The seam-sealed construction and stability options make FCX-7M a robust resonator choice for oscillator references in test and measurement instruments.
What is the MOQ and lead time for FCX-7M?
MOQ and lead time depend on frequency/CL/stability grade and production schedule. Contact FCom with your target specs for the latest MOQ, lead time and allocation options.
Do you support samples and customization?
Yes. We support evaluation samples, pilot runs and volume production. Custom options include frequency, CL, tighter tolerance/stability, and screening—send your requirements for an RFQ.
Can you provide compliance or test documentation?
Yes. FCX-7M is RoHS/REACH compliant. Packaging info, test conditions and supporting documents can be provided upon request for qualification and production release.
Technical Support & Compliance
- Application engineering support: oscillator start-up margin, CL tuning, drive level guidance, layout and reliability screening — Contact our experts.
- ISO certifications: ISO 9001 / ISO 14001
- Browse the family page: Quartz Crystal Resonators
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