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8T49N282i-Block Diagram

8T49N282

FemtoClock NG Dual Universal Frequency Translator (4-in/2-PLL/8-out)

The 8T49N282I has two independent, fractional-feedback PLLs that can be used as jitter attenuators and frequency translators. It is equipped with six integer and two fractional output dividers, allowing the generation of up to eight different output frequencies, ranging from 8kHz to 1GHz. Four of these frequencies are completely independent of each other and the inputs. The other four are related frequencies. The eight outputs may select among LVPECL, LVDS or LVCMOS output levels.

IDT’s 3rd generation Universal Frequency Translator family also includes the 8T49N281i (2-in/1-PLL/8-out) and the 8T49N283i (2-in / 2-PLL / 8-out).

Features

  • Two differential outputs meet jitter limits for 100G Ethernet and STM-256/OC-768
    • <0.3ps RMS (including spurs): 12kHz to 20MHz
  • Accepts up to four LVPECL, LVDS, LVHSTL, HCSL or LVCMOS input clocks ranging from 8kHz upt to 875MHz
    • Auto and manual input clock selection with hitless switching
    • Clock input monitoring, including support for gapped clocks
  • Phase-Slope Limiting and Fully Hitless Switching options to control output phase transients
  • Operates from a 10MHz to 40MHz fundamental-mode crystal such as the IDT 603-40-48 (40 MHz) or 603-38.88-7 (38.88MHz)
  • Generates eight LVPECL / LVDS or 16 LVCMOS output clocks ranging from 8kHz up to 1.0GHz (diff), 8kHz to 250MHz (LVCMOS)
  • Register programmable through I2C / SPI or via external I2C EEPROM
  • Supported by IDT Timing Commander Software

Product Specification

Phase Jitter Typ RMS (ps)Inputs (#)Input TypeInput Freq (MHz)Outputs (#)Output Voltage (V)Output Freq Range (MHz)Output Type
0.260, 0.2804LVDS, LVPECL, LVHSTL, HCSL, LVTTL, LVCMOS0.008000 - 875.00000082.5, 3.30.008000 - 1000.000000LVDS, LVPECL, LVCMOS

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8T49N282C-998NLGIActiveNLG72P2VFQFPN72IYesTrayCheck Availability
8T49N282C-998NLGI8ActiveNLG72P2VFQFPN72IYesReelCheck Availability
8T49N282C-999NLGIActiveNLG72P2VFQFPN72IYesTrayCheck Availability
8T49N282C-999NLGI8ActiveNLG72P2VFQFPN72IYesReelCheck Availability

Documents

Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
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8T49N282 Final Datasheet Datasheet PDF 1.38 MB Feb 2, 2016
User Guides & Manuals
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FemtoNG Universal Frequency Translator Ordering Product Information Guide Manual - User Reference PDF 216 KB Sep 9, 2016
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Timing Commander Installation Guide Guide PDF 497 KB Oct 7, 2013
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-807 Recommended Crystal Oscillators for NetSynchro WAN PLL Application Note PDF 78 KB Apr 29, 2016
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AN-872 How to Setup UFT3G Devices as a Zero Delay Buffer (ZDB) Application Note PDF 442 KB Nov 17, 2014
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AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
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AN-860 8T49N28X Frequency Programming Guide Application Note PDF 214 KB Jun 5, 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-845 Termination - LVCMOS Application Note PDF 62 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-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 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-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 8, 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-839 RMS Phase Jitter Application Note PDF 149 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-834 Hot-Swap Recommendations Application Note PDF 67 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-832 Timing Budget and Accuracy Application Note PDF 48 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-809 Power Dissipation and Thermal Considerations Application Note PDF 100 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
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AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PCNs & PDNs
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PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 28, 2016
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PCN# : W1512-01 Wafer Size change from 200mm to 300mm at Global Foundries Product Change Notice PDF 188 KB Jan 3, 2016
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PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
Other
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IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
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IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016
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8T49N282 RevD_v1.0 Evaluation Board Reference Schematic Schematic PDF 120 KB Dec 8, 2014
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IDT Jitter Attenuator Product Overview 简体中文 Overview PDF 1.95 MB Oct 23, 2014
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Universal Frequency Translator Third Generation Product Brief PDF 565 KB Jul 30, 2014
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8T49N282I IBIS Model Engineering TXT 991 KB Oct 15, 2013

Software & Tools

Title Type Format File Size Datesort icon
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8T49N28x (UFT) Timing Commander Personality Software TCP 4.81 MB Sep 7, 2016
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Timing Commander Installer v1.7.3.3 Software ZIP 17.87 MB May 12, 2016

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