ICS9250-25

Integrated Circuit Systems, Inc. ICS9250-25 Preliminary Product Preview Frequency Generator & Integrated Buffers for Celeron & PII/III™ Recommended Application: 810/810E and Solano type chipset Output Features: 2 - CPUs @ 2.5V, up to 153.33MHz. 13 - SDRAM @ 3.3V, up to 153.33MHz. 3 - 3V66 @ 3.3V, 2x PCI MHz. 8 - PCI @3.3V. 1 - 48MHz, @3.3V fixed. 1 - 24MHz @ 3.3V 1 - REF @3.3V, 14.318MHz. Features: Up to 153.33MHz frequency support Support power management through PD#. Spread spectrum for EMI control (± 0.25%) center spread. Uses external 14.318MHz crystal FS pins for frequency select Key Specifications: CPU Output Jitter: <250ps IOAPIC Output Jitter: <500ps 48MHz, 3V66, PCI Output Jitter: <500ps Ref Output Jitter. <1000ps CPU Output Skew: <175ps PCI Output Skew: <500ps 3V66 Output Skew <175ps For group skew timing, please refer to the Group Timing Relationship Table. VDDREF X1 X2 GNDREF GND3V66 3V66-0 3V66-1 3V66-2 VDD3V66 VDDPCI 1 *FS0/PCICLK0 1 *FS1/PCICLK1 PCICLK2 GNDPCI PCICLK3 PCICLK4 PCICLK5 VDDPCI PCICLK6 PCICLK7 GNDPCI PD# SCLK SDATA VDDSDR SDRAM11 SDRAM10 GNDSDR Pin Configuration 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 REF0/FS4* VDDLAPIC IOAPIC VDDLCPU CPUCLK0 CPUCLK1 GNDLCPU GNDSDR SDRAM0 SDRAM1 SDRAM2 VDDSDR SDRAM3 SDRAM4 SDRAM5 GNDSDR SDRAM6 SDRAM7 SDRAM_F VDDSDR GND48 24MHz/FS2* 1 48MHz/FS3* VDD48 VDDSD...