Diodes Incorporated
Back to Clock Generators / Synthesizer - Automotive


Single HCSL output PCIe Clock Generator

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The PI6C557-01BQ is a spread spectrum clock generator compliant to PCI Express® 3.0 and Ethernet requirements.  The device is used for Automotive systems. The PI6C557-01BQ provides one differential (HCSL) or LVDS spread spectrum output. Using Diodes' patented Phase-Locked Loop (PLL) techniques, the device takes a 25MHz crystal input and produces one pair of differential outputs (HCSL) at 100MHz. It also provides spread selection of -0.5% and no spread.


  • PCIe® 3.0 compliant
  • Phase jitter - 0.45ps RMS (High Freq. Typ.)
  • LVDS compatible output
  • Supply voltage of 3.3V ±10%
  • 25MHz crystal or clock input frequency
  • HCSL outputs, 0.8V current mode differential pair
  • Jitter 35ps cycle-to-cycle (typ)
  • Spread of -0.5% and no spread
  • Industrial temperature range
  • Spread Bypass option available
  • Spread selection via external pins
  • Packaging: (Pb-free and Green)
    -16-pin TQFN

Product Specifications

Product Parameters

Compliance (Only Automotive(Q) supports PPAP) Automotive
Supply Voltage (V) 3.3
Jitter RMS (ps) 1
Skew (PS) 0
Output Frequency (MHz) 100
Input Type(s) Crystal, LVCMOS
Output Type(s) HCSL
Number of Outputs 1
Function Generator
Ambient or Junction Temperature (°C) -40 to 85

Related Content


Technical Documents

Recommended Soldering Techniques


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

Request Documents

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-2322 (Advance Notice) 2018-03-19 2020-03-15 Fab Porting from Global Foundries to MagnaChip