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 Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
932SQ428AKLF Active NDG48P1 VFQFPN 48 C Yes Tray
932SQ428AKLFT Active NDG48P1 VFQFPN 48 C Yes Reel

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
932SQ428 Datasheet Datasheet PDF 356 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB
AN-839 RMS Phase Jitter Application Note PDF 149 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB
AN-815 Understanding Jitter Units Application Note PDF 476 KB
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB
AN-808 PCI Express/HCSL Termination Application Note PDF 54 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
932SQ428 Block Diagram Block Diagram PNG 34 KB

Software & Tools

Title Other Languages Type Format File Size Date
932SQ428A IBIS Model Model - IBIS ZIP 22 KB