Clocks & Timing

Overview

The IDT932S421 is a main clock synthesizer for CK410B+ generation Intel server platforms. The IDT932S421 is driven with a 14.318MHz crystal. It generates 4 CPU outputs up to 400MHz and 5 PCIe Gen2 PCI-Express clocks. The 48 MHz USB clock is an exact 48.000 MHz clock.

932S421C - Block Diagram
932S421C - Pinout
932S421C - Block Diagram
932S421C - Pinout
  • 4 - 0.7V HCSL differential CPU pairs
  • 5 - 0.7V HCSL differential SRC pairs
  • 4 - PCI (33MHz) 3.3V LVTTL outputs
  • 3 - PCICLK_F, (33MHz) 3.3V LVTTL free-running outputs
  • 1 - 48MHz 3.3V LVTTL output
  • 2 - 14.318MHz 3.3V LVTTL outputs
  • Phase Jitter: PCIe Gen2 < 3.0ps rms
  • Phase Jitter: PCIe Gen1 <86ps peak-peak

Documentation

Title Type Date
932S421B Datasheet
PDF260 KB
Datasheet
AN-805 Recommended Ferrite Beads
PDF91 KB
Application Note
AN-827 Application Relevance of Clock Jitter
PDF1.99 MB
Application Note
AN-828 Termination - LVPECL
PDF322 KB
Application Note
AN-844 Termination - AC Coupling Clock Receivers
PDF170 KB
Application Note
AN-842 Thermal Considerations in Package Design and Selection
PDF495 KB
Application Note
AN-840 Jitter Specifications for Timing Signals
PDF442 KB
Application Note
AN-838 Peak-to-Peak Jitter Calculations
PDF115 KB
Application Note
AN-839 RMS Phase Jitter
PDF233 KB
Application Note
AN-815 Understanding Jitter Units
PDF565 KB
Application Note
AN-808 PCI Express/HCSL Termination
PDF137 KB
Application Note
PLC# : 220001-R1 End-of-Life (EOL) Process on Select Part Numbers
PDF938 KB
End Of Life Notice
PLC# : 220001 End-of-Life (EOL) Process on Select Part Numbers
PDF909 KB
End Of Life Notice
PDN# : CQ-20-05 End-of-Life (EOL) Process on Select Part Numbers
PDF720 KB
End Of Life Notice
IDT Clock Generation Overview
PDF1.83 MB
Overview
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly
PDF611 KB
Product Change Notice
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly
PDF611 KB
Product Change Notice
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location
PDF596 KB
Product Change Notice
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location
PDF544 KB
Product Change Notice
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages
PDF95 KB
Product Change Notice
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages
PDF50 KB
Product Change Notice
PCN#: A1309-03 Additional Assembly Sources
PDF398 KB
Product Change Notice
PCN# : A1305-01 Gold Wire to Copper Wire
PDF148 KB
Product Change Notice
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products
PDF361 KB
Product Change Notice

Design & Development

Software Downloads

Title Type Date
PLC# : 220001-R1 End-of-Life (EOL) Process on Select Part Numbers
PDF938 KB
End Of Life Notice
PLC# : 220001 End-of-Life (EOL) Process on Select Part Numbers
PDF909 KB
End Of Life Notice
PDN# : CQ-20-05 End-of-Life (EOL) Process on Select Part Numbers
PDF720 KB
End Of Life Notice

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

Models

Title Type Date
932S421b
ZIP22 KB
Model - IBIS

Product Options

    Processing table
    Part Number
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    932S421BGLF
    block_flippedObsolete
    memory
    view_in_ar
    		TSSOP 56 C Yes Tube
    932S421BGLFT
    block_flippedObsolete
    memory
    view_in_ar
    		TSSOP 56 C Yes Reel
    932S421CGLF
    block_flippedObsolete
    memory
    view_in_ar
    		TSSOP 56 C Yes Tube
    932S421CGLFT
    block_flippedObsolete
    memory
    view_in_ar
    		TSSOP 56 C Yes Reel
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