ICS9248-110

Integrated Circuit Systems, Inc. ICS9248-110 AMD-K7TM System Clock Chip Recommended Application: AMD-K7 based systems Output Features: 3 differential pair open drain CPU clocks (2.7V external pull-up; up to 150MHz achieviable through I2C) 2 - AGPCLK @ 3.3V 8 - PCI @3.3V, including 1 free running 1 - 48MHz @ 3.3V 1 - 24/48MHz @ 3.3V 2- REF @3.3V, 14.318MHz. Features: Up to 150MHz frequency support Support power management: CPU, PCI, stop and Power down Mode from I2C programming. Spread spectrum for EMI control -0.5% down spread Uses external 14.318MHz crystal FS pins for frequency select Key Specifications: CPU – CPU: <250ps AGP-AGP: <250ps PCI – PCI: <400ps CPU - SDRAM_OUT: <400ps CPU-AGP <250ps Pin Configuration **FS0/REF0 **FS1/REF1 GNDREF X1 X2 GNDPCI PCICLK_F PCICLK0 VDDPCI PCICLK1 PCICLK2 GNDPCI PCICLK3 PCICLK4 VDDPCI PCICLK5 PCICLK6 VDDAGP AGP0 AGP1 GNDAGP VDD48 48MHz SEL24_48#/24-48MHz 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 VDDREF GNDSD SDRAM_OUT VDDSD RESERVED CPUCLKC2 CPUCLKT2 GNDCPU CUCLKC1 CPUCLKT1 GND CPUCLKC0 CPUCLKT0 RESERVED VDD GND PCI_STOP# CPU_STOP PD# SPREAD# FS2* SDATA SCLK GND48 48-Pin 300mil SSOP * Internal 120K pullup resistor on indicated inputs ** Internal 240K pullup resistor on indicated inputs Block Diagram X1 X2 OSC REF (1:0) CPU_STOP# Functionality FS (2:0) SPREAD# PLL CPU STOP CPUCLKT (2:0) CPUCLKC (2:0) SDR...