The 950401 is a main clock synthesizer chip for AMD-K8. This provides all clocks required for Clawhammer and Sledgehammer systems. Spread spectrum may be enabled through I2C programming. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The 950401 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations. Serial programming I2C interface allows changing functions, stop clock programming and frequency selection.


  • 2 - Differential pair push-pull CPU clocks @ 3.3V
  • 7 - PCI (Including 1 free running) @3.3V
  • 3 - Selectable HT/PCI 66/33MHz @3.3V
  • 1 - 48MHz, @3.3V fixed.
  • 1 - 24/48MHz @ 3.3V
  • 3 - REF @3.3V, 14.318MHz.
  • Up to 220MHz frequency support
  • Support power management: PCI stop and stop clocks controlled by I2C.
  • Spread spectrum for EMI reduction
  • Uses external 14.318MHz crystal
  • I2C programmability features
  • Supports Hypes transport technology (HT66 output).

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Package Buy Sample
950401CFLFT Obsolete SSOP 48 C Yes Reel Package Info

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
950401 Datasheet Datasheet PDF 180 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