SmartNICs

SmartNICs (smart network interface cards) are an essential piece of today’s data center infrastructure, offloading the workload of the host processor and enabling expanded services. Reference clocks are a critical component in SmartNICs. These clocks must be resilient under airflow, heat, and vibration. SiTime MEMS timing solutions are built to reliably operate in the tight, hot environments of BBUs and DUs, while consuming less space and power.
SiTime differential oscillators offer low jitter and best-in-class PSNR to improve signal integrity. When IEEE 1588 clock recovery is needed, SiTime Elite Platform® Super-TCXOs® for Data Center Infrastructure are ideal – offering OCXO-grade frequency slope in a TCXO form factor that is small enough to fit on the back of a card.
SiTime MEMS Timing Benefits for Data Center Infrastructure Applications
Complete MEMS clock treePrecision MEMS TCXO Low jitter differential MEMS XO |
More robust in real-world conditions4x better dF/dT for accurate IEEE 1588 Resistant to airflow and heat Immunity to power supply noise |
Thin profile, easy to useNo cover or shielding ≤1 mm thin that fits back of a card |
IEEE1588 Enabled, 10/40/100 GbE NIC
10/40/100 GbE NIC
MEMS Timing Solutions for SmartNICs
MEMS Timing Solutions | Function | Frequency | Key Features |
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SiT5907 Super-TCXO | IEEE1588 and high-speed SERDES reference clock | 20 MHz | ±20 ppb up to 70°C, operable to 105°C |
SiT535x Super-TCXO | 1 to 220 MHz | ±100 ppb, ±1 ppb/°C 105°C | |
SiT9501 Differential XO |
High-speed SERDES reference clock | 25 to 644.53125 MHz |
70 fs jitter for Ethernet, 105°C |
SiT9375 Differential XO | 25 to 644.53125 MHz |
200 fs jitter for Ethernet, 105°C |
MEMS Timing Outperforms Quartz
Better Stability |
Better Frequency Slope |
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Better Vibration Resistance |
Better Aging |
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Better Allan Deviation |
Better PSNR (Power Supply Noise Rejection) |
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Watch Video: SiTime MEMS Timing Solutions for SmartNICs
Application Notes and Papers
• Adaptive Drift Compensation for Holdover Oscillators
• AN10063 TCXO and OCXO Stability and System Impact Beyond Rated Temperature
• AN10064 Improved System Performance with Digital Frequency Tuning in Precision Super-TCXOs
• AN10052 IEEE 1088 Precision Time Protocol (PTP) in ITU-T Standards
• See full list of related applications notes
Video
