NOTICE - The following device(s) are recommended alternatives:

953002 is a 56-pin clock chip for P4 type processors with PCI-Express. The 953002 is part of a whole new line of ICS clock generators and buffers called TCH™ (Timing Control Hub). This part incorporates ICS's newest clock technology which offers more robust features and functionality. Employing the use of a serially programmable I2C interface, this device can adjust the output clocks by configuring the frequency setting, the output divider ratios, selecting the ideal spread percentage, the output skew, the output strength, and enabling/disabling each individual output clock. M/N control can configure output frequency with resolution up to 0.1MHz increment.


  • 2 - 0.7V current-mode differential CPU pairs
  • 1 - 0.7V current-mode differential CPU/PCI-Express selectable pair
  • 6 - PCI, 33MHz
  • 2 - REF, 14.318MHz
  • 3 - 3V66, 66.66MHz
  • 1 - 48MHz
  • 1 - 24/48MHz
  • 5 - PCI-Express 0.7V current mode differential pairs
  • CPU outputs cycle-cycle jitter < 85ps
  • 3V66 outputs cycle-cycle jitter < 250ps
  • PCI outputs cycle-cycle jitter < 500ps
  • Programmable output frequency.
  • Programmable asynchronous 3V66&PCI frequency.
  • Programmable asynchronous PCI-Express frequency.
  • Programmable output divider ratios.
  • Programmable output skew.
  • Programmable spread percentage for EMI control.
  • Watchdog timer technology to reset system if system malfunctions.
  • Programmable watch dog safe frequency.
  • Support I2C Index read/write and block read/write operations.
  • Uses external 14.318MHz reference input, external crystal load caps are required for frequency tuning.

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Obsolete SSOP 56 C Yes Tube
Obsolete SSOP 56 C Yes Reel
Obsolete SSOP 56 C Yes Tube
Obsolete SSOP 56 C Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
953002 Datasheet Datasheet PDF 399 KB
PCN# : A1908-02 Adding SPEL India and Greatek Taiwan as Qualified Assembly Facilities Product Change Notice PDF 157 KB
PDN# : TP-19-06 Manufacturing Discontinuance Notice Product Discontinuation Notice PDF 1016 KB
PDN# : CQ-16-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 552 KB
PCN# : A1506-02 Gold wire to Copper wire Product Change Notice PDF 35 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB
PC Clocks Contact Info Misc PDF 62 KB