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Ethernet Clock Generator

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The PI6LC48L0201 is a 2-output LVDS synthesizer optimized to generate Ethernet reference clock frequencies and is a member of Pericom’s HiFlex family of high performance clock solutions. Using a 25MHz crystal, the most popular Ethernet frequencies can be generated based on the settings of 2 frequency select pins.
The PI6LC48L0201 uses Pericom’s proprietary low phase noise PLL technology to achieve ultra low phase jitter, so it is ideal for Ethernet interface in all kind of systems.


  • Networking systems


  • Two differential LVDS output pairs
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended clock input
  • Supports the following output frequencies: 62.5MHz, 125MHz, 156.25MHz
  • RMS phase jitter @ 156.25MHz, using a 25MHz crystal (1.875MHz – 20MHz): 0.2ps (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: 20-TSSOP

Product Specifications

Product Parameters

Supply Voltage (V) 2.5, 3.3
Jitter RMS (ps) 0.35
Skew (PS) 0
Output Frequency (MHz) 2x 62.5/ 125 / 156.25 MHz
Input Type(s) Crystal, CMOS
Output Type(s) LVDS
Number of Outputs 2
Supported Frequencies (MHz) 62.5, 125, 156.25
Ambient or Junction Temperature (°C) -40 to 85

Technical Documents

Recommended Soldering Techniques


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

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Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
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Qty. Carrier


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 19 12/4/2022 South America, North America, Asia, Europe, Middle East Buy Now
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PI6LC48L0201LIEX Active TSSOP-20 GREEN 3000 T&R Contact Sales Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free


PI6LC48L0201 FAQs

What is HiFlex® clock IC?

PI6LCxxxx is Pericom's newly developed high frequency, very low jitter clock generator family, which use high Q silicon VCO to dramatically reduce traditional PLL clock jitter. They are especially good for Telecom, Datacom, and Ethernet for phase jitter <=1 ps designs.  HiFlex Clock FInder tool

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.