ICS9FG104

www.DataSheet4U.com Integrated Circuit Systems, Inc. ICS9FG104 Programmable FTG for Differential P4TM CPU, PCI-Express & SATA Clocks Recommended Application: Pin Configuration Frequency Timing Generator for Differential CPU & SATA XIN/CLKIN 1 clocks X2 2 Features: VDD 3 Generates common CPU frequencies from 14.318 GND 4 MHz or 25 MHz REFOUT 5 Crystal or reference input FS2 6 4 - 0.7V current-mode differential output pairs DIF_3 7 Supports Serial-ATA at 100 MHz DIF_3# 8 VDD 9 Two spread spectrum modes: 0 to -0.5 downspread and +/-0.25% centerspread GND 10 DIF_2 11 Unused inputs may be disabled in either driven or HiZ state for power management. DIF_2# 12 M/N Programming SDATA 13 SCLK 14 Key Specifications: 28-pin Output cycle-to-cycle jitter < 50 ps Output to output skew < 35 ps +/-300 ppm frequency accuracy on output clocks +/- 150 ppm frequency accuracy @ 100 MHz outputs Frequency Select Table SEL14M_25M# FS2 FS1 FS0 OUTPUT(MHz) (FS3) 0 0 0 0 100.00 0 0 0 1 125.00 0 0 1 0 133.33 0 0 1 1 166.67 0 1 0 0 200.00 0 1 0 1 266.00 0 1 1 0 333.00 0 1 1 1 400.00 1 0 0 0 100.00 1 0 0 1 125.00 1 0 1 0 133.33 1 0 1 1 166.67 1 1 0 0 200.00 1 1 0 1 266.00 1 1 1 0 333.00 1 1 1 1 400.00 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VDDA GNDA IREF FS0 FS1 DIF_0 DIF_0# VDD GND DIF_1 DIF_1# SEL14M_25M# SPREAD DIF_STOP# SSOP/TSSOP ww w.D ata Sh eet 4U .co m 0839G—06/05/06 ICS9FG104 www.DataSheet4U.com Integrated Circuit Systems, Inc. ICS9FG104 Pin Description PIN #...