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8413S08I - Block Diagram
8413S08I - Pinout


Clock Generator For Cavium Processors

The 8413S08I is a PLL-based clock generator specifically designed for Cavium Networks SoC processors. This high performance device is optimized to generate the processor core reference clock, the PCI/PCI-X/PCIe bus clocks, the clocks for both the Gigabit Ethernet MAC and PHY and also the optional SGMII clock. The clock generator offers ultra low-jitter, low-skew clock outputs, and edge rates that easily meet the input requirements for the CN56xx series of processors. The output frequencies are generated from a 25MHz external input source or an external 25MHz parallel resonant crystal. The industrial temperature range of the 8413S08I supports tele- communication, networking, and storage requirements.


  • Eight selectable 100MHz or 125MHz clocks for PCI Express™ and sRIO, HCSL interface levels
  • One 156.25MHz SGMII clock, LVPECL interface levels
  • Three LVCMOS/LVTTL outputs, 20Ω output impedance
  • Selectable external crystal or differential (single-ended) input source
  • Crystal oscillator interface designed for 25MHz, parallel resonant crystal
  • Differential CLK, nCLK input pair that can accept: LVPECL, LVDSLVHSTL, HCSL input levels
  • Internal resistor bias on nCLK pin allows the user to drive CLK input with external single-ended (LVCMOS/ LVTTL) input levels
  • Output supply voltage modes:
    VDD / VDDO
  • Full 3.3V output supply mode (HCSL)
  • PCI Express™ (2.5 Gb/s), Gen 2 (5 Gb/s), and Gen 3 (8 Gb/s) jitter compliant
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package​

Product Specification

Phase Jitter Typ RMS (ps)Inputs (#)Input TypeInput Freq (MHz)Outputs (#)Output TypeOutput Voltage (V)Output Freq Range (MHz)App Jitter Compliance
0.2602Crystal, LVCMOS25.00000015LVPECL, LVCMOS, HCSL2.5, 3.325.000000, 33.300000, 50.000000, 100.000000, 125.000000, 156.250000

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8413S08BKILFActiveNLG56P3VFQFPN56IYesTrayCheck Availability
8413S08BKILFTActiveNLG56P3VFQFPN56IYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
ICS8413S08I Datasheet Datasheet PDF 629 KB Oct 4, 2016
User Guides & Manuals
Timing Solutions for Cavium Processor Designs Guide PDF 810 KB Mar 9, 2016
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
show all (19)
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 8, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 6, 2014
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB May 6, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 5, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 15, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 15, 2014
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 22, 2015
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 21, 2015