FemtoClock® Crystal-to-3.3V LVDS Frequency Synthesizer

The 844003 is a three differential output LVDS Synthesizer designed to generate Ethernet reference clock frequencies. Using a 31.25MHz or 26.041666MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the settings of four frequency select pins (DIV_SEL[A1:A0], DIV_SEL[B1:B0]): 625MHz, 312.5MHz, 156.25MHz, and 125MHz. The 844003 has two output banks, Bank A with one differential LVDS output pair and Bank B with two differential LVDS output pairs.

The two banks have their own dedicated frequency select pins and can be independently set for the frequencies mentioned above. The 844003 uses IDT’s 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The 844003 is packaged in a small 24-pin TSSOP package.

Features

  • Three LVDS outputs on two banks, A Bank with one LVDS pair and B Bank with two LVDS output pairs
  • Using a 31.25MHz or 26.041666MHz crystal, the two output
    banks can be independently set for 625MHz, 312.5MHz,
    156.25MHz or 125MHz
  • Selectable crystal oscillator interface or LVCMOS/LVTTL
    single-ended input
  • VCO range: 560MHz to 700MHz
  • RMS phase jitter @ 156.25MHz (1.875MHz - 20MHz): 0.63ps (typical)
  • 3.3V output supply mode
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) packaging

Product Options

下单器件 ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
844003AGLF Active PGG24 TSSOP 24 C Yes Tube
Availability
844003AGLFT Active PGG24 TSSOP 24 C Yes Reel
Availability

技术资料

文档标题 他の言語 文档类型 文档格式 文件大小
数据手册与勘误表
844003 Final Datasheet Datasheet PDF 333 KB 2月 2, 2016
应用指南 &白皮书
AN-828 Termination - LVPECL Application Note PDF 229 KB 7月 5, 2016
AN-831 The Crystal Load curve Application Note PDF 308 KB 9月 22, 2014
AN-846 Termination - LVDS Application Note PDF 50 KB 5月 12, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB 5月 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB 5月 11, 2014
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB 5月 10, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB 5月 7, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB 5月 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB 5月 6, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB 5月 6, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB 5月 5, 2014
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB 5月 5, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB 5月 5, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB 5月 5, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB 5月 4, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB 4月 23, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB 4月 23, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB 3月 11, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB 1月 14, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB 1月 14, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB 1月 14, 2014
PCN / PDN
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB 4月 13, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB 2月 14, 2016
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB 1月 27, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB 11月 12, 2015
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB 10月 21, 2015
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB 7月 20, 2015
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB 3月 23, 2013
其它
Timing Solutions Products Overview Overview PDF 4.11 MB 10月 31, 2018
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB 11月 29, 2016
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB 4月 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB 4月 24, 2016