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9FG830AFILF Datasheet(PDF) 1 Page - Integrated Device Technology |
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9FG830AFILF Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 19 page 9FG830 IDT® Eight Output Differential Frequency Generator for PCIe Gen3 and QPI 1680C—08/26/10 Eight Output Differential Frequency Generator for PCIe Gen3 and QPI 1 DATASHEET General Description: The 9FG830 is a Frequency Timing Generator that provides 8 HCSL differential output pairs. These outputs support PCI-Express Gen3, and QPI applications. The part supports Spread Spectrum and synthesizes several additional output frequencies from either a 14.31818 MHz crystal, a 25 MHz crystal or reference input clock. The 9FG830 also outputs a copy of the reference clock. Complete control of the device is available via strapping pins or via the SMBus interface. Recommended Application: 8 Output Differential Output Frequency Generator for PCIe Gen3 and QPI Output Features: • 8 - 0.7V current mode differential HCSL output pairs • 1 - 3.3V LVTTL REF output Features/Benefits: • Pin-to-Pin with 9FG108D; Easy upgrade to PCIe Gen3 • Generates common frequencies from 14.318 MHz or 25 MHz; single part supports mulitple applications • Provides copy of reference output; eleminates need for additional crystal or oscillator • Three spread spectrum modes: -0.5%, +/-0.25%, and off; EMI reduction • Unused outputs may be disabled in Hi-Z; save system power • Device may be configured by SMBus and/or strap pins; can be used in systems without SMBus Key Specifications: • Cycle-to-cycle jitter: < 50ps with 25MHz input • Output-to-output skew: <50ps • Phase jitter: PCIe Gen3 < 1ps rms • Phase jitter: QPI 9.6GB/s < 0.2ps rms • 10 ppm synthesis error with 25MHz input and Spread Off Functional Block Diagram STOP LOGIC XIN/CLKIN X2 DIF(7:0) CONTROL LOGIC SPREAD FS(2:0) SDATA SCLK SEL14M_25M# DIF_STOP# PROGRAMMABLE SPREAD PLL 8 IREF OSC REFOUT OE(7:0) |
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