220 to 900 MHz Endura™ Ruggedized Ultra-Low Jitter Differential XO


The Endura™ SiT9357 low jitter differential oscillator is designed for harsh environmental conditions of aerospace and defense applications. It supports frequencies from 220 to 900 MHz in 1 Hz increments, temperatures up to 125°C, and 0.04 ppb/g frequency stability under vibration. This device delivers exceptional dynamic performance with 150 fs jitter (typ.) and ±20 ppm frequency stability over temperature. The SiT9357 is remarkably resilient to power supply noise, EMI, and board bending. It is 100% screened through the SiTime Endura process flow to provide high reliability.

The SiT9357 is available in the smallest differential package, a 2.0 x 1.6 mm QFN. This device supports any voltage between 1.8 to 3.3 V in combination with all popular differential output signaling types including LVPECL, LVDS, HCSL and Low-power HCSL, plus FlexSwing™, an output-driver that performs like LVPECL and provides independent control of voltage swing and DC offset.

View related products: 1 to 220 725 MHz  |  70 fs jitter 

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"Specs" "Value"
Frequency 220 to 900 MHz
Frequency Stability (ppm) ±20, ±50
Operating Temperature Range (°C) -40 to 85, -40 to 105, -40 to 125, -55 to 125
Package Type (mm²) 2.0 x 1.6, 2.5 x 2.0, 3.2 x 2.5
Oscillator Type XO-DE
Phase Jitter (rms) 150 fs
Pin1 Feature No Function, OE active high, OE active low
Voltage Supply (V) 1.8 ±5%, 2.5 ±10%, 3.3 ±10%, 2.25 to 3.63 , 1.71 to 3.63
Features Ultra-low g-sensitivity down to 0.04 ppb/g
Availability Pre-production Sampling

Exceptional dynamic performance in harsh operating conditions

  • 0.23 ps (typ.) integrated phase jitter, 12 kHz to 20 MHz
  • ±20 ppm stability over temperature
  • ±300 ppb 20-year aging, 8x better than quartz
  • Rated for operation at high altitude up to 70,000 ft.
  • Minimum survivability of 20,000g IAW MIL-STD-883 TM 2002
  • Excellent system performance under environmental stressors

20x lower sensitivity to vibration

  • 0.04 ppb/g g-sensitivity, IAW MIL-PRF-55310 section
  • Minimizes packet loss in high-vibration environments

9 fs/mV power supply noise rejection (PSNR)

  • Simplifies power supply design

2.0 x 1.6 mm package

  • Industry’s smallest differential package
  • Enables small form-factor system with stringent jitter requirement

Flexible programmable features

  • 220 to 900 MHz, accurate to 6 decimal places
  • 1.8 to 3.63 V
  • LVPECL, LVDS, HCSL, Low-power HCSL with integrated series termination, and FlexSwing, a flexible and low power output driver to simplify interfacing to non-standard voltages

Superior reliability

  • 1 billion hours MTBF
  • 6x higher shock survivability
  • Lifetime warranty: Reduces field failures due to clock components and associated trouble shooting and repair costs
  • FPGA Clocking
  • Avionics
  • Communication & Networking Equipment
  • Optical Modules
  • Coherent Optics
  • Storage, Servers & Datacenters
  • Broadcast Video


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

Jitter Calculator and Plots – Convert phase noise to phase jitter, find phase noise plots

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