1 to 340 MHz, Ultra-Low Jitter, ±20 to ±50 ppm, I2C Programmable Oscillator

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The Endura™ SiT3541 is an ultra-low jitter, user-programmable oscillator, engineered to deliver high reliability in aerospace and defense applications. This device utilizes SiTime's unique DualMEMS™ temperature sensing and TurboCompensation™ technology to deliver exceptional dynamic performance in harsh environments, making it:

  • Resistant to airflow and thermal shock
  • Resistant to mechanical shock and vibration
  • Robust against power supply noise

The device supports two in-system programming options:
   1) Any-frequency mode to reprogram the clock output to any frequency between 1 MHz to 340 MHz
   2) Digitally controlled oscillator (DCO) mode to steer or pull the clock up to ±3200 ppm

Endura SiT3541 is 100% screened through the SiTime Endura process flow to provide high reliability.


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I2C/SPI programmable oscillators in small 5.0 x 3.2 mm packages
"Specs" "Value"
Frequency 1 to 340 MHz
Frequency Stability (ppm) ±20 , ±25 , ±50
Operating Temperature Range (°C) -40 to +85
Package Type (mm²) 5.0 x 3.2 10-pin
Oscillator Type I2C/SPI ISP XO-DE
Phase Jitter (rms) ≤ 0.23 ps
Pull Range (ppm) ±25 , ±50 , ±80 , ±100 , ±125 , ±150 , ±200 , ±400 , ±600 , ±800 , ±1200 , ±1600 , ±3200
Voltage Supply (V) 2.5 to 3.3
Features Ultra-low acceleration sensitivity, MIL-STD-55310, MIL-PRF-883 , In-System Programmable via I2C/SPI
Availability Production

In-system programmable from 1 MHz and 340 MHz via I2C/SPI

Digital frequency pulling (DCO) via I2C/SPI

  • Output frequency pulling with perfect pull linearity

  • 13 programmable pull range options to ±3200 ppm

  • Frequency pull resolution as low as 5 ppt (0.005 ppb)

Low acceleration sensitivity

  • As low as 0.1 ppb/g

Integrated LDO for on-chip power supply noise filtering

  • 0.05 ps/mV power supply noise rejection (PSNR)

  • Reduces BOM by eliminating a LDO

Programmable LVPECL, LVDS, or HCSL output

  • Programmable LVPECL, LVDS swing

  • LVDS common mode voltage control

  • Optimizes signal integrity

Superior reliability

  • 1 billion hours MTBF

  • Lifetime Warranty: Reduces repair costs and field failures due to clock components

  • Manpack Radios
  • Field Communications
  • Avionics
  • Engine Management / Control
  • Satellite Base Station
  • Ruggedized Applications
  • Command & Control
  • UAV Communications
  • Vehicle Communications
  • Flight Computer Platform
  • LEO SatCom
  • GNSS Receivers

Frequency Slope (dF/dT) Calculator – Calculate frequency slope over temperature

QFN 5032 10-Pins 3D Step Model – Preview oscillator packages in 3D

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