What are electronic components? Definition & three families

Electronic components are standardized building blocks used to build circuits that sense, compute, store, communicate and power modern devices. They fall into three broad families. FCom specializes in timing devices that set the speed and synchronization for your entire system.

Quick catalog of common components

FCom specializes in timing devices—precision parts that set the speed and synchronization for your entire system.

Timing devices at FCom: build stable, low-jitter clocks

Timing devices provide the heartbeat for everything from wearables and cameras to 5G base stations and time servers. FCom Fuji Crystal offers a full portfolio:

How to select the right component (with a timing focus)

Model matching by application

Common pitfalls (what to avoid)

• Wrong load capacitance on crystals → frequency offset and poor start-up. Fix: match CL per datasheet; account for stray PCB capacitance.
• Leaving OE/standby floating on oscillators → intermittent clocks. Fix: tie to a defined logic level via MCU or pull-resistor.
• Long clock traces / stubs → ringing and EMI. Fix: keep traces short, consider small series damping (22–33 Ω) near source.
• Placing clocks near antennas/RF → desense issues. Fix: route away from RF front-ends; add ground shielding if needed.
• Missing decoupling → jitter spikes. Fix: 0.1 µF (and 1 µF bulk) close to Vdd-GND; short return path.
• Ground pour under crystal can (for discrete resonators) → parasitics. Fix: keep-out under the can; follow recommended pad layout.
• Voltage domain mismatch (1.8 V ↔ 3.3 V) → level issues. Fix: confirm output logic high/VIH and receiver tolerance.
• Ignoring OCXO warm-up → early instability. Fix: budget warm-up time; consider holdover specs for timing paths.

Layout checklist (fast pass before tape-out)

• Place timing device close to the consuming IC (MCU/PHY/FPGA). Keep clock trace & return path short.
• Decouple Vdd with 0.1 µF (X7R MLCC) + 1 µF nearby; via-in-pad or shortest route to ground.
• For discrete crystals: keep XIN/XOUT loop compact; no ground pour under can; symmetric load caps; guard ring to reduce crosstalk.
• Consider series damping 22–33 Ω at the source if overshoot/ringing observed.
• Avoid stubs/tees; if fan-out is required, buffer the clock rather than branching the trace.
• Respect keep-out near RF paths and high di/dt power nets; route orthogonally across layers when crossing.
• Confirm OE/Standby logic and pull-ups/downs; define default boot state.
• Review thermal/warm-up area for OCXO; ensure airflow is not forcing drift.

Block diagram: quartz resonator in a feedback oscillator

In practice, the crystal behaves like a very selective RLC network. The loop gain/phase conditions (Barkhausen criteria) ensure a stable oscillation at the crystal’s resonance while the output buffer conditions the waveform (CMOS or clipped sine).

See: How a Crystal Oscillator Works

FAQ

What package sizes are common?

From tiny 2.0×1.6 mm SMD oscillators for wearables to larger 25.4×22.1 mm OCXOs for telecom. Choose size based on stability, phase noise and assembly constraints.

Which specs influence radio performance?

Frequency stability vs. temperature, short-term stability (Allan deviation), RMS jitter and close-in phase noise. For GNSS, better stability improves sensitivity and TTFF.

Any quick layout tips?

Short return paths, single-point ground for the crystal can, keep noisy clocks away from antennas, place a 0.1 µF decoupling cap at Vdd.

References

• IEEE Standards Association
• International Electrotechnical Commission (IEC)
• IPC — Association Connecting Electronics Industries
• Wikipedia: Electronic component (overview)