REFOUT DATASHEET FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA ICS9FG104E Description Features/Benefits The ICS9FG104E is a frequency generator that provides 4 Generates common frequencies from 14.318MHz or differential HCSL output pairs. It can be used to drive PCIe 25MHz Gen1/2, SATA and USB3.0 devices. The part can use Crystal or reference input either a 14.31818 MHz or 25 MHz crystal. The 9FG104E 4 - 0.7V current-mode HCSL output pairs can also be driven by a reference input clock instead of a Supports Serial-ATA at 100MHz crystal. It provides outputs with cycle-to-cycle jitter of less Two spread spectrum modes: -0.5% down spread and than 50 ps and output-to-output skew of less than 35 ps. +/-0.25% center spread Lower EMI Recommended Application 31.5KHz spread modulation rate passes USB3 compliance testing Frequency Generator for CPU, PCIe Gen1/2, SATA and Unused outputs may be disabled in either driven or Hi-Z USB3.0 state for power manangement Output Features I-temp version available supports embedded applications 4 - HCSL differential outputs 1 - 3.3V REF output (either 14.318M or 25M depending Key Specifications on XTAL) Cycle to cycle jitter: < 50ps Phase jitter: PCIe Gen1/2 <3ps rms Output to output skew <35ps +/-300 ppm frequency accuracy on output clocks +/-50ppm on all output frequencies with Spread Off Block Diagram XIN/CLKIN OSC X2 2 4 PROGRAMMABLE STOP DIF(3:0) SPREAD PLL LOGIC SPREAD SEL14M 25M CONTROL DIF STOP LOGIC FS(2:0) SDATA SCLK IREF IDT FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA 1 ICS9FG104E REV D 102912ICS9FG104E FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA Pin Configuration XIN/CLKIN 1 28 VDDA X2 2 27 GNDA VDD 3 26 IREF GND 4 25 vFS0 REFOUT 5 24 vFS1 vFS2 6 23 DIF 0 DIF 3 7 22 DIF 0 DIF 3 8 21 VDD VDD 9 20 GND GND 10 19 DIF 1 DIF 2 11 18 DIF 1 DIF 2 12 17 SEL14M 25M SDATA 13 16 vSPREAD SCLK 14 15 DIF STOP Pin has internal 120K pull up v Pin has internal 120K pull down Power Groups Pin Number VDD GND Description 34 REFOUT, Digital Inputs DIF Outputs 9,21 10,20 28 27 IREF, Analog VDD, GND for PLL Core 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 IDT FREQUENCY GENERATOR FOR PCIE GEN1/2, USB3.0, QPI & SATA 2 ICS9FG104E REV D 102912 9FG104E