ICS9248-135 Datasheet | Integrated Circuit Systems

Features : - 3- CPUs @ 2.5/3.3V, up to 166MHz. - 10 - SDRAM @ 3.3V, up to 166MHz including 2 SDRAM_F's - 7- PCI @3.3V, - 1- 48MHz, @3.3V fixed. - 1- 24/48MHz, @3.3V selectable by I2C (Default is 24MHz). - 2- REF @3.3V, 14.318MHz. Features : - Up to 166MHz frequency support - Support FS0-FS3 trapping status bit for I2C read back. - Support power management: CPU, PCI, SDRAM stop and Power down Mode form I2C programming. - Spread spectrum for EMI control (0 to -0.5%, ± 0.25%). - FS0, FS1, FS3 must have a internal 120K pull-Down to GND. - Uses external 14.318MHz crystal Skew Specifications: - CPU - CPU: < 175ps - SDRAM - SDRAM < 250ps - PCI - PCI: < 500ps - CPU - SDRAM: < 500ps - CPU (early) - PCI: 1-4ns (typ. 2ns) Pin Configuration VDDREF 1 - REF0/FS3 GNDREF X1 X2 VDDPCI - PCICLK_F/FS1 - PCICLK1/FS2 PCICLK2 GNDPCI PCICLK3 PCICLK4 PCICLK5 PCICLK6 VDD GND SDRAM_STOP# - - PD# VDD CPU_STOP# PCI_STOP# GND SDATA SCLK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 REF1 VDDLCPU CPUCLK_F CPUCLK1 GNDL CPUCLK2 VDD SDRAM_F1 SDRAM_F0 GND SDRAM7 SDRAM6 VDD SDRAM5 SDRAM4 GND SDRAM3 SDRAM2 VDD SDRAM1 SDRAM0 VDD 1 48MHz/FS0- 24_48MHz/CPU2.5_3.3#- 48-Pin 300mil SSOP - These inputs have a 120K pull down to GND. - - These inputs have a 120K pullup to VDD. 1 These are double strength. Functionality Block Diagram FS3 PLL2 /2 X1 X2 XTAL OSC PLL1 Spread Spectrum 48MHz 24_48MHz CPU (MHz) 66.6 100.0 150.0 133.3 66.8 100.0 100.0 133.3 66.8 97.0 70.0 95.0 95.0 112.0 97.0 96.2 FS2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1...