FCX-5U Quartz Crystal | Resistance Welded
DIP HC-50U
FEATURE
FCX-5U is a low-frequency AT-cut quartz crystal in a resistance welded metal housing. With support for frequencies as low as 850 kHz and a standard load capacitance of 10 to 20 pF, the FCX-5U is ideal for applications requiring highly stable timing in microcontroller systems, test equipment, and embedded designs.
Product Description
FCX-5U Resistance Welded Quartz Crystal (0.85–4 MHz)
Key Features
- Resistance-welded metal housing (HC-50U type)
- Low frequency support: as low as 0.85 MHz
- AT-cut quartz crystal design
- Standard operating temperature: -40°C to +85°C
- RoHS and REACH compliant, lead-free
Applications
- Microcontroller timing
- Test and measurement systems
- Consumer electronics
- FPGA reference clocks
- Computer peripheral devices
Electrical Specifications
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions |
|---|---|---|---|---|---|---|
| Nominal Frequency | F | 0.85 | – | 4.0 | MHz | Ambient 25±5°C, RH 40–70% |
| Frequency Tolerance | FT | – | ±30 | – | ppm | @ 25°C ±3°C |
| Frequency Stability | ST | ±50 | – | ±50 | ppm | @ -20°C to +70°C or -40°C to +85°C |
| Operating Temperature | Topr | -40 | 25 | +85 | °C | – |
| Load Capacitance | CL | 10 | – | 20 | pF | Or specify |
| Drive Level | DL | – | – | 2 | mW | Maximum |
| ESR (Equivalent Series Resistance) | ESR | – | – | 1000 | Ω | @ 0.85–1 MHz |
| ESR @ 1–1.5 MHz | – | – | – | 600 | Ω | – |
| ESR @ 1.5–2.5 MHz | – | – | – | 300 | Ω | – |
| ESR @ 2.5–3.0 MHz | – | – | – | 150 | Ω | – |
| ESR @ >3.0 MHz | – | – | – | 100 | Ω | – |
| Aging (1st Year) | – | – | ±5 | – | ppm/year | @ 25°C |
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©Fuji Crystal (Hong Kong) Electronics Co., Ltd. All Rights Reserved.
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