SIT5348

The Endura™ SiT5348 is a ruggedized ±50-ppb ultra-precision Super-TCXO with an acceleration sensitivity as low as 0.004 ppb/g. 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 SiT5348 delivers the most 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 SiT5348 is 100% screened through the SiTime™ Endura process flow to provide high reliability.

Rugged performance under airflow, fast temp. ramp

• ±50 ppb over-temp stability
  
• 1.5e-11 ADEV at 10 second average time
  
• ±1 ppb/°C frequency slope (ΔF/ΔT)
  

• Ensures better system-level reliability of equipment operation in hostile environments
  

Best acceleration sensitivity

• As low as 0.004 ppb/g
  

20x better phase noise under vibration

• Minimizes call and/or link drops in high-vibration environments
  

0.2 ps/mV power supply noise rejection (PSNR)

• Reduces BOM by eliminating a dedicated LDO for TCXO
  

LVCMOS or Clipped sinewave output

• Optimizes for best balance between EMI and jitter
  

Rich programmable features

• Any frequency between 1 to 60 MHz
  
• 2.25 to 3.63 V
  
• Large pull range from ±6.25 to ±3200 ppm
  

• Customize TCXO specifications for optimal system performance
  

Digital frequency tuningthrough 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