ICS950703

Integrated Circuit Systems, Inc. ICS950703 Programmable Timing Control HubTM for P4TM Recommended Application: Intel Tehema and Tehema-E Chipsets Output Features: 4 Differential CPU Clock Pairs @ 3.3V 2 - 3V MREF clocks for memory reference seeds, (separate single ended but 180 degrees out of phase) 4 - 66MHz 3V66 output 10 - 3V 33MHz PCI clocks 2 - 48MHz clocks (180 degrees out of phase) 2 - 14.318 reference output (180 degrees out of phase) Key Specifications: 3V66 Output jitter <300ps CPU Output Jitter <200ps MREF Output jitter <250ps Features/Benefits: QuadRomTM frequency selection. Programmable asynchronous 3V66/PCI frequency. Programmable output frequency. Programmable output divider ratios. Programmable output rise/fall time. Programmable output skew. Programmable spread percentage for EMI control. Programmable watch dog safe frequency. Support I2C Index read/write and block read/write operations. Uses external 14.318MHz reference input. Frequency Table Bit4 Sel133/100 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Bit3 FS3 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 Bit2 FS2 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 Bit1 FS1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 Bit0 FS0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 CPU MHz 90.00 100.00 100.90 103.00 105.00 108.00 110.00 112.00 115.00 118.00 120.00 122.00 125.00 127.00 130.00 ...