Clocks & Timing

Overview

The 9SQ440 is an Intel CK440 main clock synthesizer for Intel cloud and HPC platforms, and newer Intel-based server platforms. 9SQ440 is a single-chip, PCIe Gen6 compliant, and is designed to work as a complete clock solution or in combination with DB2000Q-compliant clock buffers to provide point-to-point clocks to multiple receiving agents.

9SQ440 - Block Diagram
9SQ440 - Pin Assignment
9SQ440 - Block Diagram
9SQ440 - Pin Assignment
  • PCIe Gen6 phase jitter < 40fs rms
  • 3 x 25MHz dedicated output pairs
  • 7 x 100MHz dedicated output pairs with individual OE# pins
  • 9 MXCLK output pairs multiplexable between 100MHz and 25MHz
  • 3.3V operation
  • 85Ω differential Low-Power HCSL (LP-HCSL) outputs eliminate 80 resistors, saving 130mm2 of area
  • 9 selectable SMBus addresses
  • Supports 0%, -0.3% and -0.5% spread-spectrum amounts
  • Side-Band Interface allows real-time hardware control of all output enables
  • OE# pin control of 100M[6:0] supports PCIe slot CLKREQ#
  • Dedicated Platform Time input and output clocks (PFT_IN and PFT_OUT)
  • 8 × 8 mm dual-row 100-VFQFPN
  • -40°C to +85°C operating temperature range

Documentation

Title
Type 		Date
9SQ440 Datasheet
PDF 605 KB 		Datasheet
AN-805 Recommended Ferrite Beads
PDF 91 KB 		Application Note
PCI Express Timing Solutions Overview
PDF 2.40 MB 		Overview
AN-827 Application Relevance of Clock Jitter
PDF 1.99 MB 		Application Note
Crystal Layout and Routing Recommendations
PDF 78 KB 		Application Note
NQQ100 Package Solder Paste Stencil
PDF 115 KB 		Application Note
PCIe Reference Clock Jitter Measurements for Gen5 and Beyond
PDF 1.35 MB 		White Paper
AN-828 Termination - LVPECL
PDF 322 KB 		Application Note
AN-891 Driving LVPECL, LVDS, CML, and SSTL Logic with IDT Universal Low-Power HCSL Outputs
PDF 480 KB 		Application Note
AN-879 Low-Power HCSL vs Traditional HCSL
PDF 235 KB 		Application Note
AN-838 Peak-to-Peak Jitter Calculations
PDF 115 KB 		Application Note
AN-839 RMS Phase Jitter
PDF 233 KB 		Application Note
AN-815 Understanding Jitter Units
PDF 565 KB 		Application Note
QFN Mounting Manual
PDF 3.19 MB 日本語 , 简体中文 		Other
14 items

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Models

Title
Type Date
9SQ440 IBIS Model
ZIP 70 KB 		Model - IBIS
1 item

Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    9SQ440NQQI
    play_circleActive
    memory
    view_in_ar
    Samples Available
    		 VFQFPN 100 I Yes Tray Get Samples,
    9SQ440NQQI8
    play_circleActive
    memory
    view_in_ar
    		VFQFPN 100 I Yes Reel
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    Renesas Samples

    Select an orderable part number:

    Orderable Part ID Sample
    9SQ440NQQI
    Availability
    Add to request
    Comparing PCI Express® Gen 3-6 Jitter Filters to a 12k-20M Jitter Filter

    This video provides a brief comparison of PCIe Gen3-6 common clock jitter filters vs. a typical 12k to 20MHz jitter filter plot. The tutorial explains what noise frequencies PCIe Gen6 is most sensitive to, and why it's important to minimize jitter in the 1MHz to 50MHz region. Presented by Ron Wade, system architect at Renesas. For more information about Renesas’ PCIe timing solutions, visit renesas.com/pcietiming

    Video List
    Comparing PCI Express® Gen 3-6 Jitter Filters to a 12k-20M Jitter Filter

    News & Blog Posts

    Future-proof Your PCIe® Designs Blog Post Apr 14, 2022
    Solving Common Issues with Respect to PCIe Timing Design on the Modern Server System Blog Post Apr 14, 2022
    Renesas Expands Data Center Solutions Portfolio with Industry’s First CK440Q-Compliant Clock Generator for PCIe Gen5 and Beyond News Feb 4, 2021
    Comparing and Contrasting PCIe and Ethernet Clock Jitter Specifications Blog Post May 22, 2018
    IDT Extends Leadership in Datacenter and Networking Systems with Launch of Its Latest PCI Express Timing Devices News Apr 30, 2018