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Differential VCXO Oscillators | FCom - Low-Jitter Clock Solution

Release time:

2025-06-26 09:00

Voltage-controlled crystal oscillators (VCXOs) play a vital role in frequency tuning and clock synchronization in data communication, broadcast systems, industrial automation, and precision timing networks. FCom’s FVC-3L-PG, FVC-5L-PG, and FVC-7L-PG series are differential output VCXOs available in 3.2×2.5 mm to 7.0×5.0 mm packages. These oscillators support frequencies from 10 to 1500 MHz, ±50 ppm pull range, LVPECL or LVDS output, and jitter as low as 1.2 ps RMS, making them ideal for low-noise, high-precision applications.

FVC-3L/5L/7L-PG VCXO Package Overview

Key Features

Wide frequency range: 10–1500 MHz
Differential output: LVPECL / LVDS (Tri-state supported)
Typical phase jitter as low as 1.2 ps RMS (12 kHz to 20 MHz)
Supports 2.5V / 3.3V operation
±50 ppm pull range for PLL compatibility
Fast startup time: 10 ms max
Industrial temperature range: -40°C to +85°C

Product Comparison

Model	Package	Frequency Range	Output Format	Pull Range	Phase Jitter
FVC-3L-PG	3.2 × 2.5 mm	10–1500 MHz	LVPECL / LVDS	±50 to ±150 ppm	0.6–1.5 ps
FVC-5L-PG	5.0 × 3.2 mm	10–1500 MHz	LVPECL / LVDS	±50 ppm	≤1.2 ps
FVC-7L-PG	7.0 × 5.0 mm	10–1500 MHz	LVPECL / LVDS	±50 ppm	≤1.2 ps

Application Scenarios

1. High-Speed Ethernet & IEEE 1588 PTP Synchronization

In data centers and enterprise networks, the FVC-PG series serves as a primary clock source for Ethernet PHY chips. For instance, 156.25 MHz is widely used in 25G/100G interfaces, switches, and distributed timing systems. When paired with Marvell 88E1512 or Broadcom BCM84891, VCXO stability directly influences time drift and phase accuracy.

2. Optical Transceivers & SONET/SDH Networks

The FVC-3L-PG is ideal for SFP+/QSFP28 transceivers at key frequencies such as 155.52 MHz and 622.08 MHz, supporting CDR and SerDes clock recovery. It is compatible with chips like IDT 844021 and Semtech GN25L95. In SONET networks, 38.88 MHz is often used as the synchronization reference.

3. Digital Video & Broadcast Systems

FVC-5L-PG and FVC-7L-PG support HDMI, DisplayPort, and media decoders with video reference clocks such as 74.25 MHz, 148.5 MHz, and 297 MHz. Their low phase noise helps reduce image jitter and timing skew. Ideal SoC platforms include Sony CXD2855 and Amlogic T962.

Differential VCXO System Block Diagram

4. Industrial Control, RTUs & Remote Communication

The FVC-7L-PG is suited for automation controllers and remote terminal units. Typical frequencies such as 24 MHz and 50 MHz are used in Modbus, CAN, and PLC systems. It maintains stability within ±25 ppm across -40°C to +85°C, compatible with TI Sitara and STM32H7 platforms.

5. Storage Systems & Jitter Cleaners

The FVC-3L-PG is perfect for timing synchronization in PCIe, SATA, and USB host controllers at 200 MHz or 400 MHz. It pairs with jitter cleaner ICs such as TI CDCE62005 or ADI AD9545, making it an excellent fit for RAID and SAS storage systems.

Conclusion

FCom’s FVC-3L/5L/7L-PG differential VCXO series delivers reliable, low-jitter clocking solutions across optical communications, data storage, industrial control, and multimedia systems. With broad frequency coverage, multiple packages, and wide voltage compatibility, these oscillators provide exceptional flexibility for system designers.

For more information, datasheets, or sample requests, please visit the FCom Official Website.

Key words:

application

Fcom

Automotive Electronics

Fire-fighting

Quartz Crystal

OCXO