ICS950223

Integrated Circuit Systems, Inc. ICS950223 Programmable Timing Control Hub™ for P4™ Recommended Application: Brookdale and Brookdale-G chipset with P4 processor. Output Features: 3 - Pairs of differential CPU clocks (differential current mode) 3 - 3V66 @ 3.3V 10 - PCI @ 3.3V 1 - 48MHz @ 3.3V fixed 2 - REF @ 3.3V, 14.318MHz 1 - 48_66MHz selectable @ 3.3V fixed 1 - 24_48MHz selectable @ 3.3V Features/Benefits: QuadRomTM frequency selection. Programmable output frequency. Programmable asynchronous 3V66 & PCI frequency. Programmable output divider ratios. Programmable output rise/fall time. Programmable output skew. Programmable spread percentage for EMI control. Watchdog timer technology to reset system if system malfunctions. Programmable watchdog safe frequency. Support I2C Index read/write and block read/write operations. Uses external 14.318MHz reference input. Key Specifications: CPU Output Jitter <150ps 3V66 Output Jitter <250ps CPU Output Skew <100ps Pin Configuration *MULTSEL1/REF1 1 VDDREF 2 X1 3 X2 4 GND 5 *FS2/PCICLK0 6 *FS3/PCICLK1 7 **SEL48_24#/PCICLK2 8 VDDPCI 9 *FS4/PCICLK3 10 PCICLK4 11 PCICLK5 12 GND 13 PCICLK6 14 PCICLK7 15 PCICLK8 16 PCICLK9 17 VDDPCI 18 Vttpwr_GD# 19 RESET# 20 GND 21 ~ *FS0/48MHz 22 *FS1/24_48MHz 23 AVDD48 24 48 REF0/MULTSEL0** 47 GNDREF 46 VDDCPU 45 CPUCLKT2 44 CPUCLKC2 43 GNDCPU 42 PD#* 41 CPUCLKT0 40 CPUCLKC0 39 VDDCPU 38 CPUCLKT1 37 CPUCLKC1 36 GNDCPU 35 IREF 34 AVDD 33 GND 32 VDD3V66 31 3V66_0...