ICS9FG107 Datasheet, PDF (4/14 Pages) Integrated Circuit Systems – Programmable FTG for Differential CPU, PCI Express & SATA Clocks

Integrated
Circuit
Systems, Inc.
ICS9FG107
General 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.
Block Diagram
XIN/CLKIN
X2
REFOUT
SCLK
SDATA
DIF_STOP#
SEL14M_25M#
SPREAD
DWNSPRD#
OE (6:0)
FS (2:0)
Control
Logic
Programmable
Spread
PLL1
Programmable
Frequency
Dividers
PCICLK (1:0)
PCICLK_F
DIF (6:0)
DIF# (6:0)
I REF
Power Groups
Pin Number
VDD
GND
3
4
10
6
14,19,31,36,40
15,35
N/A
47
48
47
Description
REFOUT, Digital Inputs, SMBus
PCI Outputs
DIF Outputs
IREF
Analog VDD & GND for PLL Core
0863C—11/22/04
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