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849N212I Block Diagram

849N212I

FemtoClock NG Universal Frequency Translator

The 849N212I is a highly flexible FemtoClock NG general purpose, low phase noise Universal Frequency Translator / Synthesizer with alarm and monitoring function suitable for networking and communications applications. The 849N212I has three operating modes to support a very broad spectrum of applications: frequency Synthesizer, high-bandwidth frequency translator, and low-bandwidth frequency translator. This device provides two factory-programmed default power-up configurations burned into One-Time Programmable (OTP) memory. To implement other configurations, these power-up default settings can be overwritten after power-up using the I2C interface and the device can be completely reconfigured.

Features

  • Two Output Universal Frequency Translator/Frequency Synthesizer
  • One programmable as LVPECL or LVDS, One LVCMOS
  • Programmable output frequency: 1.0MHz to 250MHz
  • Two differential inputs support the following input types: LVPECL, LVDS, LVHSTLHCSL
  • Input frequency range: 8kHz - 710MHz , Crystal input frequency range: 16MHz - 40MHz
  • Two factory-set register configurations for power-up default state
  • I2C Serial interface for register programming
  • RMS phase jitter at 125MHz, using a 40MHz crystal (12kHz - 20MHz): 558fs (typical), Low Bandwidth Mode (FracN)
  • RMS phase jitter at 125MHz, using a 100MHz input clock (12kHz - 20MHz): 388fs (typical), High Bandwidth Mode (Integer FB)
  • -40\xB0C to 85\xB0C ambient operating temperature

Product Specification

Phase Jitter Typ RMS (ps)Inputs (#)Input TypeInput Freq (MHz)Outputs (#)Output TypeOutput Voltage (V)Output Freq Range (MHz)App Jitter Compliance
0.3213HCSL, HSTL, LVDS, LVPECL, Crystal0.008000 - 710.0000002LVDS, LVCMOS, LVPECL2.5, 3.30.980000 - 250.000000

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
849N212CKI-004LFNot Recommended
NLG40P2VFQFPN40IYesTrayCheck Availability
849N212CKI-999LFActiveNLG40P2VFQFPN40IYesTrayCheck Availability

Documents

Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
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ICS849N212I Datasheet PDF 727 KB Nov 20, 2012
User Guides & Manuals
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FemtoNG Universal Frequency Translator Ordering Product Information Guide Manual - User Reference PDF 216 KB Sep 9, 2016
Apps Notes & White Papers
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AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
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AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
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AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
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AN-846 Termination - LVDS Application Note PDF 50 KB May 13, 2014
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AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
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AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
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AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 8, 2014
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AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
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AN-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
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AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
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AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
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AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
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AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
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AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 6, 2014
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AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB May 6, 2014
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AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 6, 2014
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AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 5, 2014
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AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
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AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
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AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
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AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
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AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 15, 2014
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AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 15, 2014
PCNs & PDNs
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PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB Sep 11, 2013
Other
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Timing Fabric for Communications Equipment Overview Overview PDF 263 KB Dec 10, 2015
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FemtoClockNG-UniversalFrequencyTranslators Product Brief PDF 1.06 MB Aug 8, 2011