The SiT5977 Super-TCXO® is the newest member of the SiTime Elite RF™ family. This is the only single-chip timing solution that delivers the most resilient performance for AI compute-nodes with high bandwidth and network synchronization. Applications include smart network interface cards (Smart NICs), acceleration cards, switches and compute nodes.
Combining SiTime’s DualMEMS® technology with a low-noise digital PLL, this chip delivers excellent jitter, dynamic stability in the presence of airflow and thermal excursions, and resistance to shock and vibration. Multiple on-chip regulators filter power supply noise, eliminating the need for an external LDOs.
The SiT5977 offers frequency control (DCTCXO) via an I2C/SPI interface with 0.05 ppt resolution and up to ±400 ppm pull range. This unique functionality, along with 80 fs phase jitter, can eliminate the need for a jitter cleaner and enable new architectural options.
Main Features:
- Environmentally robust with ±1 ppb/°C frequency slope (dF/dT) for optimum performance under airflow, thermal shock
- Capable of driving 800G and higher links via 80 fs phase jitter and LVDS outputs
- Enables embedded control loops with precise digital tuning of output frequency (DCTCXO), ±400 ppm pull range and 0.05 ppt (5e-14) resolution via I2C/SPI
- Eliminates link flaps from quartz timing activity dips or micro jumps
- Resistant to shock, vibration and board bending
- Eliminates external LDOs via on-chip voltage regulators
- 156.25 MHz output frequency enabling high-speed SerDes and 800G links
