SIT5147

The Endura™ SiT5147 is a ruggedized ±0.5 to ±2.5 ppm Super-TCXO with an acceleration sensitivity as low as 0.004 ppb/g and high temp operation up to 105°C. This device is engineered for harsh environments and is ideal for high-reliability aerospace and defense applications. By leveraging SiTime’s unique DualMEMS™ temperature sensing and TurboCompensation™ technology, the SiT5147 delivers stable timing in the presence of environmental stressors – airflow, temperature perturbation, vibration, shock, and electromagnetic interference (EMI).

This MEMS-based Endura Super-TCXO can be factory-programmed to any combination of frequency, stability, voltage, and pull range. This programmability enables designers to optimize the clock configuration while eliminating the long lead time and customization costs associated with quartz TCXOs where each frequency is custom built.

The SiT5147 is 100% screened through the SiTime Endura™ process flow to provide high reliability.

Rugged performance under airflow, fast temp. ramp

• ±0.5 ppm over-temp stability, up to 105°C
  
• 1.5e-11 ADEV at 10 second average time
  
• ±1 ppb/°C frequency slope (ΔF/ΔT)
  

Best acceleration sensitivity

• As low as 0.004 ppb/g
  

20x better phase noise under vibration

• Minimizes loss of satellite lock in high-vibration environments
  

0.2 ps/mV power supply noise rejection (PSNR)

• Reduces BOM by eliminating a dedicated LDO for the TCXO
  

LVCMOS or Clipped sinewave output

• Optimize for best balance between EMI and jitter
  

Rich programmable features

• Any frequency between 60 to 220 MHz
  
• ±0.5 ppm, ±1 ppm, ±2.5 ppm
  
• 2.25 to 3.63 V
  
• Large pull range from ±6.25 to ±3200 ppm:
  

Digital frequency tuning through I2C

• Eliminate frequency shift caused by board noise
  

Superior reliability

• 1 billion hours MTBF 
  
• Lifetime warranty: Reduces repair costs and field failures due to clock components