The rapid expansion of AI computing infrastructure is accelerating the transition of optical modules from 800G to 1.6T, with 3.2T technologies beginning to emerge. As transmission rates increase, optical communication systems require higher-frequency reference clocks with tighter jitter control.
At CIOE 2026 in Shenzhen, demand for high-speed optical interconnects was a major industry focus. Reference-clock requirements are expanding beyond 156.25 MHz to frequencies such as 312.5 MHz and 625 MHz, creating new demand for high-frequency, ultra-low-jitter differential oscillators.
AI server clusters must transfer increasingly large volumes of data between computing nodes, switches and optical interfaces. This is driving the adoption of higher-speed optical modules and more advanced signal-processing architectures.
Technologies such as PAM4, high-speed SerDes, DSP, co-packaged optics (CPO) and linear pluggable optics (LPO) place increasingly stringent demands on clock performance. The reference clock must provide more than an accurate nominal frequency—it also needs low phase jitter, stable operation and an output format suitable for high-speed differential interfaces.
Poor clock quality can reduce timing margins and affect the performance of high-speed data links. As optical modules move toward higher data rates, clock jitter therefore becomes an increasingly important design consideration.
The YXC YSO233UJ is a photolithographically manufactured, high-fundamental-frequency differential oscillator designed for high-speed optical communication applications.
Its combination of high-frequency operation, ultra-low jitter and differential output support makes it suitable for reference-clock applications in 800G and next-generation optical modules.
At 312.5 MHz with an LVPECL output, the YSO233UJ provides typical phase jitter of 30 fs. This helps deliver a clean reference clock for high-speed DSP and SerDes devices, where clock noise can directly affect signal timing and link performance.
The series supports key frequencies used in communication systems:
This frequency range gives designers more flexibility when selecting reference clocks for different optical-module architectures and transmission rates.
The YSO233UJ supports LVDS, LVPECL and HCSL outputs. These differential formats are commonly used in high-speed communication equipment because they support fast switching and improved signal integrity in noise-sensitive designs.
The standard operating temperature range is −40°C to +105°C, with wider temperature options available according to application requirements. This allows the oscillator to address the frequency stability, jitter and environmental requirements of demanding communication systems.
The clock requirements of AI computing and optical communication equipment extend beyond a single oscillator. Different parts of the system may require fixed-frequency oscillators, programmable outputs, clock generation, clock distribution or frequency synchronization.
YXC develops and manufactures a broad range of frequency-control and timing products, including:
For high-speed optical communication applications, this product portfolio supports timing requirements ranging from frequency selection and low-jitter differential clock generation to configurable clock distribution and reliable volume production.
As optical interconnects continue to evolve toward higher data rates, stable and low-jitter reference clocks will remain an essential part of the signal chain. The YSO233UJ gives designers a high-frequency differential oscillator option for 800G and next-generation optical-module designs.
