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Integrated Circuit Systems, Inc.
ICS9FG1904B-1
Frequency Generator for CPU, PCIe Gen 1, PCIe Gen 2 & FBD
Recommended Application: DB1900GS/GSO with 15:4 output grouping
Features: • Power up default is all outputs in 1:1 mode • DIF_(14:0) can be “gear-shifted” from the input CPU
Host Clock • DIF_(18:15) can be “gear-shifted” from the input CPU
Host Clock • Spread spectrum compatible • Supports output clock frequencies up to 400 MHz • 8 Selectable SMBus addresses • SMBus address determines PLL or Bypass mode
Key Specifications: • DIF output cycle-to-cycle jitter < 50ps • DIF output-to-output skew < 100ps within a group
Functionality at Power Up (PLL Mode)
FS_A_4101
1 0
CLK_IN (CPU FSB) MHz
100 <= CLK_IN < 200 200<= CLK_IN <= 400
DIF_(18:0) MHz
CLK_IN CLK_IN
1.
ICS9FG1904B-1 Datasheet
