9FG430AGLFT Renesas

REFOUT DATASHEET Four Output Differential Frequency Generator 9FG430 for PCIe Gen3 and QPI Features/Benefits: General Description: Pin-to-Pin with 9FG104D/Easy upgrade to PCIe Gen3 The 9FG430 is a Frequency Timing Generator that provides 4 HCSL differential output pairs. These outputs support PCI-Express Generates common frequencies from 14.318 MHz or 25 Gen3, and QPI applications. The part supports Spread Spectrum MHz single part supports mulitple applications and synthesizes several additional output frequencies from either Provides copy of reference output eleminates need for a 14.31818 MHz crystal, a 25 MHz crystal or reference input clock. additional crystal or oscillator The 9FG430 also outputs a copy of the reference clock. Complete Unused outputs may be disabled in Hi-Z save system control of the device is available via strapping pins or via the power SMBus inteface. Device may be configured by SMBus and/or strap pins can be used in systems without SMBus Recommended Application: 4 Output Differential Frequency Generator for PCIe Gen3 and QPI Key Specifications: Cycle-to-cycle jitter: < 50ps with 25MHz input Output Features: Output-to-output skew: <50ps 4 - 0.7V current mode differential HCSL output pairs Phase jitter: PCIe Gen3 < 1ps rms 1 - 3.3V LVTTL REF output Phase jitter: QPI 9.6GB/s < 0.2ps rms 10 ppm synthesis error with 25MHz input and Spread Off Functional Block Diagram XIN/CLKIN OSC X2 4 PROGRAMMABLE STOP DIF(3:0) SPREAD PLL LOGIC SPREAD SEL14M 25M CONTROL DIF STOP LOGIC FS(2:0) SDATA SCLK IREF IDT Four Output Differential Frequency Generator for PCIe Gen3 and QPI 1681D04/04/17 19FG430 Four Output Differential Frequency Generator for PCIe Gen3 and QPI 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 indicates internal 120K pull up v indicates 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 1 266.67 0 1 1 0 333.33 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 1 266.67 1 1 1 0 333.33 1 1 1 1 400.00 IDT Four Output Differential Frequency Generator for PCIe Gen3 and QPI 1681D04/04/17 2 9FG430