ICS9248-99

Integrated Circuit Systems, Inc. ICS9248-99 Preliminary Product Preview Frequency Generator & Integrated Buffers for Celeron & PII/III™ Recommended Application: 810/810E style chipset Output Features: 2- CPUs @2.5V @ 150MHz (up to 200MHz. achievable through I2C) 9 - SDRAM @ 3.3V @ 150MHz (up to 200MHz. achievable through I2C) 8 - PCICLK @ 3.3V 1 - IOAPIC @ 2.5V, 2 - 3V66MHz @ 3.3V 2- 48MHz, @ 3.3V fixed. 1- 24/48MHz, @ 3.3V 1- REF @3.3V, 14.318MHz. Features: Up to 200.4MHz frequency support Support FS0-FS3 trapping status bit for I2C read back. Support power management: Power down Mode form I2C programming. Spread spectrum for EMI control ( ± 0.25% center). FS0, FS1, FS2, FS3 must have a internal 120K pull-Down to GND. Uses external 14.318MHz crystal Skew Specifications: CPU – CPU: <175ps SDRAM - SDRAM: < 250ps 3V66 – 3V66: <175ps PCI – PCI: <500ps For group skew specifications, please refer to group timing relationship table. Pin Configuration 48-Pin 300mil SSOP * These inputs have a 120K pull down to GND. 1 These are double strength. Block Diagram Functionality FS3 FS2 FS1 FS0 CPU (MHz) SDRAM (MHz) 3V66 (MHz) PCICLK (3V66* 1/2) (MHz) I OA P I C (PCI* 1/2) (MHz) I OA P I C (PCI) (MHz) 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 75.33 125.00 129.00 150.29 150.00 112.00 145.00 143.64 68.30 105.00 138.00 140.00 66.67 100.00 133.60 133.33 113.00 7...