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PCIe® 2.0 Clock Generator with 4 HCSL Outputs for Automotive Applications

NOTE: Datasheet may not yet reflect updated package obsolescence/phase out status or Package Drawing. Please refer to the PRODUCT OPTIONS tab for the most up to date package options and drawings. Please refer to PCN/PDN tabs for most current package obsolescence/phase out status.

Product Description

The PI6C557-05Q is a spread spectrum clock generator compliant to PCI Express® 2.0 and Ethernet requirements. The device is used for PC or embedded systems to substantially reduce Electro-magnetic Interference (EMI). The PI6C557-05Q provides four differential (HCSL) or LVDS spread spectrum outputs. The PI6C557-05Q is configured to select spread and clock selection. Using Diodes' patented Phase-Locked Loop (PLL) techniques, the device takes a 25MHz crystal input and produces four pairs of differential outputs (HCSL) at 100MHz and 200MHz clock frequencies. It also pro- vides spread selection of -0.5%, -1.0%, -1.5%, and no spread.


  • PCIe® 2.0 complaint 
      →Phase jitter - 2.1ps RMS (typ)
  • LVDS compatible outputs
  • Supply voltage of 3.3V ±5%
  • 25MHz crystal or clock input frequency
  • HCSL outputs, 0.7V Current mode differential pair
  • Jitter 40ps cycle-to-cycle (typ)
  • Spread of -0.5%, -1.0%, -1.5%, and no spread
  • AEC-Q100 qualified
  • Spread Bypass option available
  • Spread and frequency selection via external pins
  • Packaging: (Pb-free and Green)
    →20-pin, 173-mil wide TSSOP

Product Specifications

Product Parameters

Supply Voltage 3.3
Jitter 3.1
Skew 50
Output Frequency 100
Input Type(s) Crystal
Output Type(s) HCSL
Number of Outputs 4
Function Generator
Temperature -40 to 85

Related Content

Quality Documentation

Quality & Reliability

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 Authorized Distributor Quantity Inventory Date Buy Online Region
PI6C557-05QLE Digi-Key Electronics 46 1/16/2019 Buy Now Americas
PI6C557-05QLEX Digi-Key Electronics 5531 1/16/2019 Buy Now Americas


Product Change Notices

PCN # Issue Date Subject
PCN-2322 (Advance Notice) 2018-19-03 Fab Porting from Global Foundries to MagnaChip


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