The 849N202I is a highly flexible FemtoClock® NG general purpose, low phase noise Universal Frequency Translator™ / Synthesizer with alarm and monitoring functions suitable for networking and communications applications. It is able to generate any output frequency in the 0.98MHz - 312.5MHz range and most output frequencies in the 312.5MHz - 1,300MHz range (see Table 3 for details). A wide range of input reference clocks and a range of low-cost fundamental mode crystal frequencies may be used as the source for the output frequency.

The 849N202I has three operating modes to support a very broad spectrum of applications.

To see other devices in this product family, visit the Universal Frequency Translators page.

Features

  • 4TH generation FemtoClock® NG technology
  • Universal Frequency Translator (UFT) / Frequency Synthesizer
  • Two outputs, individually programmable as LVPECL or LVDS
    Both outputs may be set to use 2.5V or 3.3V output levels
    Programmable output frequency: 0.98MHz up to 1,300MHz
  • Zero ppm frequency translation
  • Two differential inputs support the following input types:LVPECL, LVDS, LVHSTL, HCSL
  • Input frequency range: 8kHz - 710MHz
  • Crystal input frequency range: 16MHz - 40MHz
  • Two factory-set register configurations for power-up default state
    Power-up default configuration pin or register selectable
    Configurations customized via One-Time Programmable ROM
    Settings may be overwritten after power-up via I2C
    I2C Serial interface for register programming
  • RMS phase jitter at 125MHz, using a 40MHz crystal(12kHz - 20MHz): 510fs (typical), Low Bandwidth Mode (FracN)
  • RMS phase jitter at 400MHz, using a 40MHz crystal(12kHz - 40MHz): 321fs (typical), Synthesizer Mode (Integer FB)
  • Output supply voltage modes:
    VCC/VCCA/VCCO
    3.3V/3.3V/3.3V
    3.3V/3.3V/2.5V (LVPECL only)
    2.5V/2.5V/2.5V
  • -40°C to 85°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
849N202CKI-001LF Last Time Buy NLG40P2 VFQFPN 40 I Yes Tray
Availability
849N202CKI-008LF Last Time Buy NLG40P2 VFQFPN 40 I Yes Tray
Availability
849N202CKI-999LF Last Time Buy NLG40P2 VFQFPN 40 I Yes Tray
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
849N202 Datasheet Datasheet PDF 1.38 MB
User Guides & Manuals
FemtoNG Universal Frequency Translator Ordering Product Information Guide Manual - User Reference PDF 447 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB
AN-831 The Crystal Load curve Application Note PDF 308 KB
AN-846 Termination - LVDS Application Note PDF 50 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-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 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-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 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
PCNs & PDNs
PDN# : TP-19-06 Manufacturing Discontinuance Notice Product Discontinuation Notice PDF 1016 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB
PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB
Other
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB
Timing Fabric for Communications Equipment Overview Overview PDF 263 KB
FemtoClockNG-UniversalFrequencyTranslators Product Brief PDF 1.06 MB

Software & Tools

Title Other Languages Type Format File Size Date
849N202I IBIS Model Model - IBIS ZIP 211 KB