ICS9248-168

Integrated Circuit Systems, Inc. ICS9248-168 AMD - K7™ Clock Generator for Mobile System Recommended Application: VIA KT133 style chipset Output Features: 1 - Differential pair open drain CPU clocks 1 - CPU clock @ 3.3V 7 - SDRAM @ 3.3V 8 - PCI @ 3.3V, 1 - 48MHz, @ 3.3V fixed. 1 - 24/48MHz @ 3.3V 3 - REF @ 3.3V, 14.318MHz. Features: Up to 153MHz frequency support Support power management: CPU stop and Power down Mode from I2C programming. Spread spectrum for EMI control (± 0.25% to ± 0.6% center, or 0 to -0.5% or -1.0% down spread). Uses external 14.318MHz crystal Pin Configuration VDDREF X1 X2 *FS2/PCICLK_F *FS1/PCICLK0 VDDPCI GND PCICLK1 PCICLK2 PCICLK3 PCICLK4 PCICLK5 GND VDDPCI PCICLK6 *SDRAM_STOP# *PCI_STOP# BUFFER_IN AVDD GND GND *FS0/48MHZ *SEL24_48#/24_48MHz VDD48 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 REF0 REF1 REF2 GND GND VDD 2 CPUCLK 2 CPUCLKT0 2 CPUCLKC0 CPU_STOP#* PD#* SDRAM0 SDRAM1 VDDSDR GND SDRAM2 SDRAM3 GND VDDSDR SDRAM4 SDRAM5 SDRAM_F SCLK SDATA 1 48-Pin 300mil SSOP * Internal Pull-up Resistor of 120K to VDD 1 These outputs have double strength to drive 2 loads. 2 These outputs can be set to 1.5X strength through I2C Block Diagram PLL2 /2 X1 X2 XTAL OSC PLL1 Spread Spectrum 48MHz 24_48MHz REF (2:0) CPUCLK CPU DIVDER Stop Functionality FS2 0 0 0 0 1 1 1 CPUCLKT0 FS1 0 0 1 1 0 0 1 1 FS0 0 1 0 1 0 1 0 1 CPU 100.00 133.33 100.00 133.33 ...