Microwave Outdoor Units (ODU)

Microwave Outdoor Units (ODU)

Long haul microwave equipment is typically installed in uncontrolled environments and remote areas. The timing components used in these deployments must provide high frequency stability and low phase noise, while withstanding vibration, wide operating temperatures, and fast temperature transients. SiTime MEMS precision oscillators and clocks provide the robustness and long-term reliability (high MTBF) needed for microwave equipment.

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SiTime MEMS Timing Benefits for RU/AAU/mMIMO

Complete MEMS clock tree

Precision MEMS Super-TCXO

Stratum 3E MEMS OCXO

MEMS clock-system on a chip / PLL

More robust in real world conditions

4x better dF/dT for best IEEE 1588/eCPRI

Resistant to airflow, heat, vibration

Graceful degradation up to 125°C

Thin profile, easy to use, reliable

No external quartz

No quartz reliability issues

No cover or shielding needed

Full ODU

Image: Microwave block diagram (Full ODU)sitime.comsitime.comSiT57xxSiT53xxSiT57xxSiT95145SiT95145SiT53xxsitime.com

Split-mount ODU

Image: Microwave block diagram (Split-mount ODU)sitime.comsitime.comSiT57xxSiT53xxSiT95145SiT57xxSiT95145SiT53xxsitime.com

MEMS Timing Solutions for ODU

Devices Function Frequency Key Features
SiT535x Super-TCXOs Reference clock for jitter cleaner and IEEE1588 1 to 220 MHz ±100 ppb, ±1 ppb/°C 105°C
SiT57xx OCXOs 1 to 60 MHz ±5 ppb, ±0.04 ppb/°C
SiT9514x Network synchronizer, Jitter cleaner Ethernet, PCIe, processor & IEEE1588 clocking 8 kHz to 2.1GHz 4-in, 11-out, 4-PLL

MEMS Timing Outperforms Quartz

Better Stability

Better Frequency Slope

Image: Elite Super-TCXO outperforms quartz in stability graphs

 

Image: Elite Super-TCXO outperforms quartz in Frequency Slope graphs

 

Better Vibration Resistance

Better Aging

Image: Elite Super-TCXO outperforms quartz in Vibration Resistance graphs

 

Image: Elite Super-TCXO outperforms quartz in Aging graphs

 

Better Allan Deviation

Better PSNR (Power Supply Noise Rejection)

Image: Elite Super-TCXO outperforms quartz in Allan Deviation graphs

 

Image: Elite Super-TCXO outperforms quartz in Power Supply Noise Rejection graphs

 

Watch Video: SiTime Elite Super-TCXO Dynamic Performance vs. Quartz TCXO

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