SIT5358

The SiT5358 is a ±50 ppb precision MEMS Super-TCXO. This device is engineered for best dynamic performance. It is fully compliant to the GR-1244 Stratum 3 oscillator specifications. By leveraging SiTime’s unique DualMEMS™ and TurboCompensation™ temperature sensing technology, the SiT5358 delivers the most stable timing in the presence of environmental stressors – airflow, temperature perturbation, vibration, shock, and electromagnetic interference (EMI).

SiT5358 can be factory-programmed to any combination of frequency, 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.

Specifications

Features

Exceptional dynamic stability under airflow, fast temp. ramp

• ±50 ppb over-temp. stability from 0 to 70°C and ±100 ppb outside this temp. range
  
• 3e-11 ADEV at 10 second average time
  
• ±1 ppb/°C frequency slope (ΔF/ΔT), 1,, , °C/min ramp
  

• Ensures system-level quality of service for telecom and networking equipment in hostile environments
  

20x better phase noise under vibration

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

No activity dips or microjumps

• Eliminates any need for costly screening or burn-in tests
  

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 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