The 932SQ428 is a main clock synthesizer for Romley-generation Intel based server platforms. The 932SQ428 is driven with a 25 MHz crystal for maximum performance. It generates CPU outputs of 100MHz.


  • 2 - HCSL Non-Spread SAS outputs
  • 3 - HCSL SRC outputs - can be used as CPU@100M
  • 1 - HCSL DOT96 output
  • 1 - 3.3V 48M output
  • 5 - 3.3V PCI outputs
  • 1 - 3.3V 14.318M output
  • 0.5% down spread capable on SRC/PCI outputs
  • Lower EMI
  • 48-pin MLF package
  • Space Savings
  • Cycle to cycle jitter: SRC/NS_SAS < 50ps
  • Phase jitter: PCIe Gen2 <3ps rms
  • Phase jitter: PCIe Gen3 <1ps rms
  • Phase jitter: QPI 9.6GB/s <0.2ps rms
  • Phase jitter: NS-SAS <0.4ps rms using raw phase data
  • Phase jitter: NS-SAS <1.3ps rms using Clk Jit Tool 1.6.3

Product Options

Orderable Part ID Part Status Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active 48 C Yes Tray
Active 48 C Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
932SQ428 Datasheet Datasheet PDF 453 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 115 KB
AN-839 RMS Phase Jitter Application Note PDF 233 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-808 PCI Express/HCSL Termination Application Note PDF 137 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB
PCN# : TB1311-01 New Carrier Tape on VFQFPN-28, VFQFPN-40, VFQFPN-48 Product Change Notice PDF 790 KB
PCN# : A1305-01 Gold Wire to Copper Wire Product Change Notice PDF 148 KB
932SQ428A IBIS Model Model - IBIS ZIP 22 KB
Clock Distribution Overview 日本語 Overview PDF 217 KB
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
932SQ428 Block Diagram Block Diagram PNG 34 KB