SiTime, Silicon MEMS Oscillators and Clock Generators

SiT8225: 25MHz LVCMOS Oscillator with 0.3 ps Phase Jitter for 10GbE

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The SiT8225 is a best-in-class 0.3 ps phase jitter, ultra performance oscillator for 10GbE applications. This LVCMOS oscillator supports standard 25MHz Ethernet frequency and two other frequencies (25.000625MHz and 25.001200MHz) for buffer management and reduction of packet loss. Unlike quartz oscillators, the SiT8225 is available in any combination of voltage (1.8 to 3.3V), frequency stability (±10 to ±50 PPM) and package (2525, 3225, 5032, 7050) options. The SiT8225 is 100% compatible with legacy quartz and replaces these devices without any design changes.



Frequency Range (MHz) 25, 25.000625, 25.001200
Frequency Stability (PPM) ±10, ±20, ±25, ±50
RMS Integrated Phase Jitter
0.3 ps
SoftEdge Rise/Fall Time Control
1ns to 4ns
Temp Range (°C) -20 to +70, -40 to +85
Supply Voltage (V) 1.8, 2.5 - 3.3 (Continuous)
Package LxWxH (mm) 2.5x2.0x0.75, 3.2x2.5x0.75, 5.0x3.2x0.75, 7.0x5.0x0.9
Status Production
  • 10 GbE
  • XAUI

Features Benefits
  • 0.3 ps integrated RMS phase jitter
  • Excellent jitter margin for the most stringent applications such as 10 Gb Ethernet
  • Standard 25MHz or upshifted 25.000625MHz (25 PPM shift)
  • Buffer management prevents overflow at the receiver and reduces packet loss
  • Excellent frequency stability, as low as ±10 PPM
  • Better timing margin that enhances system stability and robustness
  • Extensive programmability
    • Supply voltage of 1.8V, 2.5V to 3.3V
    • Frequency stability from ±10PPM to ±50PPM
  • Customized specifications for optimal system performance
  • Easy availability of any device specification within the operating range
  • Configurable drive strength using SoftEdge technology
  • Slower rise/fall time that reduce system EMI
  • Saves cost by driving multiple loads and eliminates external buffers
  • Three industry standard packages
  • 100% drop in replacement for quartz oscillator, SAW and overtone oscillators without any design changes



10. Contact SiTime for custom drive strength to drive higher or multiple load, or SoftEdge™ option for EMI reduction.



1.8V LVCMOS IBIS iconSiT8225_1v8v
2.5V LVCMOS IBIS iconSiT8225_2v5v
2.8V LVCMOS IBIS iconSiT8225_2v8v
3.3V LVCMOS IBIS icon SiT8225_3v3v