Diodes Incorporated
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Ethernet, SONET, SATA, SAS Clock Generator

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Product Description

The PI6LC48P0301 is a 3-output LVPECL synthesizer optimized to generate Ethernet reference clock frequencies and is a mem- ber of Diodes' HiFlex family of high performance clock solu- tions. Using a 19.53125MHz or 25MHz crystal, the most popular Ethernet frequencies can be generated based on the settings of 4 frequency select pins.

The PI6LC48P0301 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 25MHz crystal (1.875MHz – 20MHz): 0.16ps (typical)
  • RMS phase jitter @ 156.25MHz, using a 25MHz crystal (12kHz – 20MHz): 0.32ps (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/ 150/ 156.25/ 200/ 250/ 155.52 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, 150, 156.25, 200, 250, 155.52

Technical Documents

Recommended Soldering Techniques


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

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PI6LC48P0301 FAQs

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.