Diodes Incorporated
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Ethernet Clock Generator

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The PI6LC48P03 is a 3-output LVPECL synthesizer optimized to generate Ethernet reference clock frequencies and is a member of Diodes' HiFlex family of high performance clock solutions. Using a 31.25MHz or 26.041666MHz crystal, the most popular Ethernet frequencies can be generated based on the settings of 4 frequency select pins.
The PI6LC48P03 uses Diodes' proprietary low phase noise PLL technology to achieve ultra low phase jitter, so it is ideal for Ethernet interface in all kind of systems.


  • Three differential LVPECL output pairs
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended clock input
  • Supports the following output frequencies: 125MHz, 156.25MHz, 312.5MHz, 625MHz
  • RMS phase jitter @ 156.25MHz, using a 31.25MHz or 26.041666MHz crystal (12kHz – 20MHz): 0.3ps (typical)
  • Full 3.3V or 2.5V supply modes
  • Commercial and industrial ambient operating temperature
  • Available in lead-free package: 24-TSSOP


  • Networking Systems

Product Specifications

Product Parameters

Compliance (Only Automotive(Q) supports PPAP) Standard
Supply Voltage (V) 2.5, 3.3
Additive Jitter (ps) 0.35
Skew (PS) 0
Maximum Output Frequency (MHz) 3x 125/ 156.25/ 312.5/ 625 MHz
Input Type(s) Crystal, CMOS
Output Type(s) LVPECL
Number of Outputs 3
Ambient or Junction Temperature (°C) -40 to 85
Supported Frequencies (MHz) 125, 156.25, 312.5, 625

Technical Documents

Recommended Soldering Techniques


Additional Technical Documents are available upon request:
Application information, Evaluation board, and Other technical documents

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What is LVPECL clock and its termination?

LVPECL is Low Voltage Positive (supply) Emitter Couple Logic. Its voltage level is around 2V+/-400mV and the most use termination is 150 ohm pull-down at output pin and AC or DC coupling to an equivalent 100 ohm across pair at RX ASIC side. Check ASIC datasheet  to prevent double termination.