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

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 conforms to MIL-PRF-55310 and MIL-STD-83 specifications.

View related products: 340 to 725 MHz

I2C/SPI programmable oscillators in small 5.0 x 3.2 mm packages
Oscillator Type I2C/SPI ISP XO-DE
Frequency 1 to 340 MHz
Frequency Stability (ppm) ±20, ±25, ±50
Phase Jitter (rms) ≤ 0.23 ps
Operating Temperature Range (°C) -40 to +85
Pull Range (ppm) ±25, ±50, ±80, ±100, ±125, ±150, ±200, ±400, ±600, ±800, ±1200, ±1600, ±3200
Voltage Supply (V) 2.5 to 3.3
Package Type (mm²) 5.0 x 3.2 10-pin
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

  • Land mobile radio
  • Field communications
  • Avionics
  • Engine management/control
  • Satellite base station
  • All ruggedized applications
  • Command & control
  • UAV communications
  • Vehicle comms/telemetry
  • Flight computer platform
  • Satcom
  • GNSS/navigation

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