Ultra-low Jitter Differential XO for Standard Networking Frequencies


The SiT9501 is optimized for communications applications requiring ultra-low jitter and low power, and is available in the industry’s smallest differential package.

This differential oscillator supports 14 commonly used networking frequencies from 25 MHz to 644.53125 MHz. It features 70 fs RMS jitter (typ.), excellent immunity to power supply noise and environmental hazards, industry-standard package sizes down to 2.0 x 1.6 mm, low-power options, and wide temperature support up to 105°C.

The SiT9501 offers popular output drivers for LVPECL, LVDS, HCSL and low-power HCSL with integrated termination resistors. It also features a unique FlexSwing™ driver that performs like LVPECL but with independent control of VOH and VOL levels to simplify interfacing with chipsets having non-standard input-voltage requirements. The SiT9501 accepts power-supply voltages down to 1.8V for additional power savings.

View related products: 150 fs jitter | 600 ps jitter | XO lineup

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6-pin Atna
"Specs" "Value"
Frequency 14 standard frequencies
Frequency Stability (ppm) ±20, ±25, ±30, ±50
Operating Temperature Range (°C) -20 to +70, -40 to +85, -40 to +95, -40 to +105
Package Type (mm²) 2.0x1.6, 2.5x2.0, 3.2x2.5
Oscillator Type XO-DE
Phase Jitter (rms) 70 fs
Voltage Supply (V) 1.8, 2.5, 2.8, 3.3, 1.71 to 3.63, 2.25 to 3.63
Features Ultra-low jitter, small size
Availability Production

Exceptional dynamic performance in real-life operating conditions

  • 70 fs RMS phase jitter (typ.)
  • ±20 ppm stability
  • Excellent system performance under environmental stress

20x better vibration sensitivity

  • Minimizes packet loss in high-vibration environments

0.01 ps/mV power supply induced jitter sensitivity

  • Simplify power supply design

2.0 x 1.6 mm package

  • Enables small form-factor system with stringent jitter requirement

Flexible programmable features

  • 14 common frequencies
  • 1.8 to 3.63 V
  • LVPECL, LVDS, HCSL, Low-power HCSL, FlexSwing: Flexible and low power, output drivers and terminations

Superior reliability

  • 1 billion hours MTBF
  • Lifetime warranty
  • Reduces field failures due to clock components and associated repair costs
  • Optical Modules
  • 100G / 200G / 400G / 800G Ethernet
  • Data Centers
  • Coherent Optics
  • Networking Switches & Gateways
  • AI / Graphics Cards
  • System Clocking
  • Industrial Applications
  • Ethernet Switches & Routers
  • FPGA

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

3225 6-Pins | 5032 6-Pins with CP | 7050 6-Pins with CP – Preview packages with QFN 3D step models

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