The 9FGU0631 is a member of IDT's 1.5 V Ultra-Low-Power PCIe clock family. The device has 6 output enables for clock management, 2 different spread spectrum levels in addition to spread off, and 2 selectable SMBus addresses.

Features

  • LP-HCSL outputs; save 12 resistors compared to standard PCIe devices
  • 45 mW typical power consumption; reduced thermal concerns
  • Outputs can optionally be supplied from any voltage between 1.05 and 1.5 V; maximum power savings
  • OE# pins; support DIF power management
  • Programmable slew rate for each output; allows tuning for various line lengths
  • Programmable output amplitude; allows tuning for various application environments
  • DIF outputs blocked until PLL is locked; clean system start-up
  • Selectable 0%, -0.25% or -0.5% spread on DIF outputs; reduces EMI
  • External 25 MHz crystal; supports tight ppm with 0 ppm synthesis error
  • Configuration can be accomplished with strapping pins; SMBus interface not required for device control
  • 3.3 V tolerant SMBus interface works with legacy controllers
  • Space saving 5x5mm 40-pin VFQFPN; minimal board space
  • Selectable SMBus addresses; multiple devices can easily share an SMBus segment
     

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 40 I Yes Tray
Availability
Active VFQFPN 40 I Yes Reel
Availability
Active VFQFPN 40 C Yes Tray
Availability
Active VFQFPN 40 C Yes Reel
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
9FGU0631 Datasheet Datasheet PDF 286 KB
Application Notes & White Papers
AN-918 Programmable Clocks vs Crystal Oscillators Application Note PDF 307 KB
AN-891 Driving LVPECL, LVDS, CML, and SSTL Logic with IDT Universal Low-Power HCSL Outputs Application Note PDF 480 KB
AN-879 Low-Power HCSL vs Traditional HCSL Application Note PDF 235 KB
AN-843 PCI Express Reference Clock Requirements Application Note PDF 1.90 MB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-839 RMS Phase Jitter Application Note PDF 233 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 136 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PCNs & PDNs
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB
Downloads
9FGU0631 IBIS Model Model - IBIS ZIP 96 KB
Other
PCI Express Timing Solutions Overview Overview PDF 275 KB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB