ICS950220AFLFT

ICS950220 Integrated Circuit Systems, Inc. Programmable Timing Control Hub™ for P4™ Recommended Application: CK-408 clock for Intel® 845 chipset. Pin Configuration Features/Benefits: • Programmable output 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 watch dog safe frequency. • Support I2C Index read/write and block read/write operations. • Uses external 14.318MHz crystal. VDDREF X1 X2 GND 1 *FS0/PCICLK7 1 **FS1/PCICLK8 VDDPCI GND 1 *WDEN/PCICLK0 PCICLK1 PCICLK2 PCICLK3 VDDPCI GND PCICLK4 PCICLK5 PCICLK6 VDD3V66 GND 3V66_1 3V66_2 3V66_3 #RESET VDDA 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 ICS950220 Output Features: • 3 - Pairs of differential CPU clocks @ 3.3V • 3 - 3V66 @ 3.3V • 9 - PCI @ 3.3V • 2 - 48MHz @ 3.3V fixed • 1 - 24_48MHz @ 3.3V, 48MHz, 24Mhz or 66MHz • 1 - REF @ 3.3V, 14.318MHz 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 1 REF/FS2** CPUCLKT0 CPUCLKC0 VDDCPU CPUCLKT1 CPUCLKC1 GND VDDCPU CPUCLKT2 CPUCLKC2 MULTISEL0* I REF GND 48MHz_USB/FS3** 48MHz_DOT/SEL_24_48* AVDD48 GND 3V66_0/24_48MHZ#/FS4** VDD3V66 GND SCLK SDATA Vtt_PWRGD/PD#* GND 48-Pin 300-mil SSOP Key Specifications: • CPU Output Jitter