FemtoClock™ Crystal/LVCMOS-to-LVDS/LVCMOS Frequency Synthesizer

The 844S0258-07 is an eight output synthesizer optimized to generate Gigabit and 10 Gigabit Ethernet clocks. Using a 25MHz, 18pF parallel resonant crystal, the device will generate 125MHz clocks with mixed LVDS and LVCMOS/ LVTTL output levels. 844S0258-07 uses IDT's 3rd generation low phase noise VCO technology and can achieve <1ps typical RMS phase jitter, easily meeting Ethernet jitter requirements. 844S0258-07 is packaged in a small, 32-pin VFQFN package that is optimum for applications with space limitations.

Features

  • 7 LVDS differential output at 125MHz
  • 1 LVCMOS/LVTTL single-ended outputs at 125MHz
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input and PLL bypass from a single select pin
  • Output enable signal for three LVDS outputs
  • RMS phase jitter @ 125MHz, using a 25MHz crystal
  • (1.857MHz - 20MHz): 0.278ps (typical)
  • PCI Express (2.5Gb/s) and Gen 2 (5 Gb/s) jitter compliant
  • Full 3.3V supply mode
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
844S0258CK-07LF Last Time Buy NLG32P1 VFQFPN 32 C Yes Tray Availability
844S0258CK-07LFT Last Time Buy NLG32P1 VFQFPN 32 C Yes Reel Availability

技術資料

タイトル 他の言語 タイプ フォーマット ファイルサイズ 日付
データシート
844S0258-07 Final Data Sheet Datasheet PDF 549 KB Dec 5, 2013
アプリケーションノート、ホワイトペーパー
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-846 Termination - LVDS Application Note PDF 50 KB May 12, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 7, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 6, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 6, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB May 5, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 5, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 4, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 11, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 14, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 14, 2014
PCN / PDN
PDN# : CQ-18-03 Product Discontinuance Notice Product Discontinuation Notice PDF 218 KB Apr 26, 2018
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB Dec 19, 2016
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 27, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 12, 2015
その他資料
IDT Clock Generation Overview (日本語) English Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview (日本語) English Overview PDF 3.79 MB Apr 24, 2016