TCXO Family for Sync, GNSS & Satcom

Not every high-level timing or RF system can afford the size and power consumption of an OCXO. For board-level references and RF modules that still demand excellent stability and phase noise, FCom Fuji Crystal offers a TCXO family for Sync, GNSS & Satcom as part of its timing devices portfolio. These low-noise TCXO and VCTCXO devices sit between high-end OCXO references and standard TCXO, delivering the right balance of performance, size and power.

Low phase noise High stability Sync & GNSS Satcom RF modules SMD form factor

Typical high-level TCXO use cases:

Board-level reference clocks in timing and line cards
GNSS timing receivers and high-reliability navigation modules
Microwave communication and satellite RF modules
Small-cell and outdoor base-station reference oscillators
High-speed digital cards requiring low-jitter TCXO sources

FCom Fuji Crystal TCXO family for synchronization, GNSS and satellite communication

Key Features of the TCXO Family for Sync, GNSS & Satcom

Improved phase noise and jitter compared to standard TCXO devices.
Tight frequency stability over temperature for RF and timing applications.
SMD packages optimized for compact boards and high-density designs.
TCXO and VCTCXO options for both free-running and PLL-controlled operation.
Support for telecom, GNSS and satellite bands through suitable carrier frequencies.

Product Line-Up for High-Level TCXO Applications

The TCXO family for Sync, GNSS & Satcom includes devices optimized for synchronization, GNSS and high-speed digital applications. Below is a simplified overview of key series.

Series	Package	Type	Frequency Range	Highlights
FVT-9S-LN	Approx. 14 × 9 mm SMD	Low-noise TCXO	Typical tens of MHz	Designed for timing synchronization, microwave links and satellite communication where low phase noise and tight stability are critical at the board level.
FVT-3S-LJ	3.2 × 2.5 mm SMD	Low-jitter TCXO	Broad MHz range	Ultra-compact TCXO with low jitter, ideal for high-speed digital designs, line cards and communication modules in high-level TCXO applications.
Other FVT series	Various SMD sizes	TCXO / VCTCXO	kHz to hundreds of MHz	Additional FCom TCXO families can be selected based on required stability, voltage, pull range and output type. Contact us for guidance.

Application Scenarios in Sync, GNSS & Satcom Systems

1. Board-Level Reference in Timing & Line Cards

In high-level timing architectures, an OCXO often sits at the core, while TCXO like FVT-9S-LN act as board-level references:

The OCXO provides system-wide 10 MHz or 20 MHz reference.
TCXO on individual cards generate local clocks or feed PLLs.
This structure reduces distribution loss and improves layout flexibility.

2. GNSS Timing and Satcom RF Modules

For GNSS timing receivers and satellite communication modules, this TCXO family offers a compact, low-noise reference with tightly controlled temperature stability. For improved front-end selectivity and interference resilience in GNSS and satellite RF designs, pair it with our SAW filter family for GNSS, IF & RF front ends and review the related SAW filter application guide.

Sufficiently tight stability for GNSS carrier frequency accuracy.
Lower phase noise to maintain tracking margin under interference.
Compact size for integrated RF front ends and outdoor units.

3. High-Speed Digital and SerDes Timing

Low-jitter TCXO such as FVT-3S-LJ can serve as clean reference clocks for SerDes, FPGA and high-speed I/O in high-level TCXO applications, especially when paired with jitter cleaners or clock generators.

FAQ – TCXO Family for Sync, GNSS & Satcom

When should I choose TCXO instead of OCXO in high-level timing systems?

Choose TCXO when you need good stability and phase noise but cannot afford the size, power or cost of an OCXO at every node. Typical examples include RF modules, GNSS receivers, line cards, and portable instruments that still rely on a central OCXO-based reference elsewhere in the system.

What is the role of VCTCXO in synchronization applications?

VCTCXO adds a control input so that a PLL can finely adjust the frequency for synchronization. This is useful in SyncE/IEEE 1588 boundary clocks, microwave links and other applications where the local clock must track a remote reference while maintaining good short-term stability.

Can FCom customize TCXO parameters for my project?

Yes. FCom Fuji Crystal can tailor frequency, pull range, stability class, temperature range and output type for many TCXO families. Share your system diagram and requirements, and our application engineers will propose suitable options.

Need a low-noise reference for your RF or timing card? Combine FCom TCXO with our OCXO and SAW filters to build complete timing and front-end solutions for demanding applications.