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3 Output LVPECL Networking Clock Generator

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The PI6LC48P03A 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 PI6LC48P03A 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
  • Industrial operating temperature
  • Available in lead-free package: 28-TQFN


  • Networking systems

Product Specifications

Product Parameters

Supply Voltage (V) 2.5, 3.3
Jitter RMS (ps) 0.3
Skew (PS) 30
Output Frequency (MHz) 125/ 156.25/ 312.5/ 625
Input Type(s) Crystal, CMOS
Output Type(s) LVPECL
Number of Outputs 2
Supported Frequencies (MHz) 125, 156.25, 312.5, 625
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

Request Documents
Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
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Request Samples
Qty. Carrier
PI6LC48P03AZHIEX Active V-QFN3555-28 GREEN 3500 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

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2328 2018-04-12 2018-10-12 Device End of Life for tray packaging only



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.