ICS94201

www.DataSheet4U.com Integrated Circuit Systems, Inc. ICS94201 Programmable System Frequency Generator for PII/III™ Recommended Application: 810/810E and Solano (815) type chipset Output Features: 2 - CPUs @ 2.5V 13 - SDRAM @ 3.3V 3 - 3V66 @ 3.3V 8 - PCI @3.3V 1 - 24/48MHz@ 3.3V 1 - 48MHz @ 3.3V fixed 1 - REF @3.3V, 14.318MHz Features: Programmable ouput frequency. Programmable ouput rise/fall time for PCI and SDRAM clocks. Programmable 3V66 to PCI skew. Spread spectrum for EMI control with programmable spread percentage. Watchdog timer technology to reset system if over-clocking causes malfunction. Support power management through PD#. 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 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 1 *(SEL24_48#)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 SDR...