ICS952621

www.DataSheet4U.com Integrated Circuit Systems, Inc. ICS952621 Programmable Timing Control Hub™ for Next Gen P4™ processor Recommended Application: CK409 48-pin part Output Features: 2 - 0.7V current-mode differential CPU pairs 1 - 0.7V current-mode differential CPU pairs for ITP 1 - 0.7V current-mode differential SRC pair 9 - PCI (33MHz), including 3 free running PCI 1 - USB, 48MHz 1 - DOT, 48MHz 2 - REF, 14.318MHz 3 - 3V66, 66.66MHz 1 - 3V66/VCH, selectable 48MHz or 66MHz Features/Benefits: Supports tight ppm accuracy clocks for Serial-ATA Supports spread spectrum modulation, 0 to -0.5% down spread and +/- 0.25% center spread Supports CPU clks up to 400MHz in test mode Uses external 14.318MHz crystal Supports undriven differential CPU, SRC pair in PD# and CPU_STOP# for power management. Key Specifications: CPU/SRC outputs cycle-cycle jitter < 125ps 3V66 outputs cycle-cycle jitter < 250ps PCI outputs cycle-cycle jitter < 250ps CPU outputs skew: < 100ps +/- 300ppm frequency accuracy on CPU & SRC clocks Pin Configuration Functionality USB/ FS2 DOT CPU SRC 3V66 PCI REF MHz B6b5 FS_A FS_B MHz MHz MHz MHz MHz 0 0 100.00 100/200 66.66 33.33 14.318 48.00 0 1 200.00 100/200 66.66 33.33 14.318 48.00 0 1 0 133.33 100/200 66.66 33.33 14.318 48.00 1 1 166.66 100/200 66.66 33.33 14.318 48.00 0 0 200.00 100/200 66.66 33.33 14.318 48.00 0 1 400.00 100/200 66.66 33.33 14.318 48.00 1 1 0 266.66 100/200 66.66 33.33 14.318 48.00 1 1 333.33 100/200 66...