The 843241 is a low jitter, high performance clock generator and a member of the FemtoClock® family of silicon timing products. The 843241 is designed for use in the SAS-2 interconnect and the three transport protocols that use the SAS-2 interconnect: Serial SCSI Protocol (SSP), Serial ATA Tunneled Protocol (STP), and Serial Management Protocol (SMP). The 843241 has excellent (<1ps) RMS phase jitter, over the SAS defined integration range. The 843241 uses an external, 25MHz, parallel resonant crystal to generate three selectable output frequencies: 75MHz, 100MHz, 150MHz, and 300MHz. This silicon based approach provides excellent frequency stability and reliability. The 843241 features up, down, and center spread spectrum (SSC) clocking techniques. The up, down and center SSC will be required in the SAS-2 applications that have three clock trees in the HBA and expander ASICs (see Applications Information section, Figure 3).

Features

  • Designed for use in SAS-2 systems
  • Up, down and center spread spectrum clocking
  • One differential 3.3V or 2.5V LVPECL output pair
  • Selectable output frequencies: 75MHz, 100MHz, 150MHz, 300MHz
  • RMS phase jitter @ 75MHz, (900kHz – 7.5MHz): 0.70ps (typical)
  • 3.3V or 2.5V operating supply
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) packages

Product Options

注文可能な製品ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type 購入/サンプル
843241BM-75LF Last Time Buy DCG8 SOIC 8 C Yes Tube
Availability
843241BM-75LFT Last Time Buy DCG8 SOIC 8 C Yes Reel
Availability

技術資料

タイトル 他の言語 タイプ 形式 サイズ 日付
データシート
843241 Data Sheet Datasheet PDF 445 KB
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
AN-831 The Crystal Load curve Application Note PDF 308 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB
AN-839 RMS Phase Jitter Application Note PDF 149 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB
AN-815 Understanding Jitter Units Application Note PDF 476 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB
AN-801 Crystal-High Drive Level Application Note PDF 109 KB
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB
PCN / PDN
PDN# : CQ-19-01 Quarterly Market Declined PDN Product Discontinuation Notice PDF 537 KB
PDN# : CQ-17-04(R1) Product Discontinuance Notice Product Discontinuation Notice PDF 606 KB
PDN# : CQ-17-04 Product Discontinuance Notice Product Discontinuation Notice PDF 599 KB
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB
その他資料
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Clock Generation Overview (日本語) English Overview PDF 1.83 MB
IDT Clock Distribution Overview (日本語) English Overview PDF 3.79 MB