INTEGRATED CIRCUIT SYSTEM

ICS9FG107
7-Output PCI-Express, 3 PCI 33MHz Clock Generator from 14.318MHz or 25MHz XTAL
Features

•Generates common CPU/PCI Express frequencies from 14.318 MHz or 25 MHz
•Crystal or reference input
•7 - 0.7V current-mode differential output pairs
•3 - 33MHz PCI outputs
•1 - REFOUT
•Supports Serial-ATA at 100 MHz
•Two spread spectrum modes: 0 to -0.5 downspread and +/-0.25% centerspread
•Unused inputs may be disabled in either driven or Hi-Z state for power management.

Description

ICS9FG107 is a Frequency Timing Generator that provides 7 differential output pairs that are compliant to the Intel CK409/ CK410 specification. It provides support for PCI-Express, next generation I/O, and SATA. The part synthesizes several output frequencies from either a 14.31818 Mhz crystal or a 25 MHz crystal. The device can also be driven by a reference input clock instead of a crystal. It provides outputs with cycle-to-cycle jitter of less than 85 ps and output-to-output skew of less than 85 ps. ICS9FG107 also provides a copy of the reference clock and 3 33 MHz PCI output clocks. Frequency selection can be accomplished via strap pins or SMBus control.