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
  • 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 Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
8T49N282C-998NLGI Active NLG72P2 VFQFPN 72 I Yes Tray Availability
8T49N282C-998NLGI8 Active NLG72P2 VFQFPN 72 I Yes Reel Availability
8T49N282C-999NLGI Active NLG72P2 VFQFPN 72 I Yes Tray Availability
8T49N282C-999NLGI8 Active NLG72P2 VFQFPN 72 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
IDT Products for Wired Broadband Applications Application Briefs PDF 686 KB Sep 1, 2017
8T49N282 Final Datasheet Datasheet PDF 1.38 MB Feb 1, 2016
User Guides & Manuals
FemtoNG Universal Frequency Translator Ordering Product Information Guide Manual - User Reference PDF 447 KB Jan 15, 2017
Timing Commander Installation Guide Guide PDF 497 KB Oct 6, 2013
Application Notes & White Papers
App Note 932 - Description for Startup and Calibration for UFT3G Family Application Note PDF 490 KB Aug 29, 2017
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-949 UFT3G Register Write Sequences Application Note PDF 57 KB Oct 31, 2016
AN-807 Recommended Crystal Oscillators for NetSynchro WAN PLL Application Note PDF 77 KB Oct 27, 2016
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 10, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-872 How to Setup UFT3G Devices as a Zero Delay Buffer (ZDB) Application Note PDF 442 KB Nov 16, 2014
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-860 8T49N28X Frequency Programming Guide Application Note PDF 214 KB Jun 4, 2014
AN-846 Termination - LVDS Application Note PDF 50 KB May 12, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 12, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 7, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 6, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 6, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 5, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 5, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 5, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 4, 2014
AN-809 Power Dissipation and Thermal Considerations Application Note PDF 100 KB Jan 14, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 11, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 14, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 14, 2014
PCNs & PDNs
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB Dec 19, 2016
PCN# : N1609-01 Minor Design Change on Select Devices Product Change Notice PDF 227 KB Oct 2, 2016
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 27, 2016
PCN# : W1512-01 Wafer Size change from 200mm to 300mm at Global Foundries Product Change Notice PDF 188 KB Jan 2, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 12, 2015
Other
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016
IDT Jitter Attenuator Product Overview 简体中文 Overview PDF 1.95 MB Oct 22, 2014
8T49N282 RevD_v1.0 Evaluation Board Reference Schematic Schematic PDF 120 KB Dec 7, 2014
Universal Frequency Translator Third Generation Product Brief PDF 565 KB Jul 29, 2014
8T49N282I IBIS Model Engineering IBS 991 KB Oct 14, 2013

Software & Tools

Title Other Languages Type Format File Size Date
Timing Commander Installer v1.9.3.8 Software ZIP 18.53 MB Jun 12, 2017
8T49N28x (UFT) Timing Commander Personality Software TCP 4.81 MB Sep 6, 2016

Evaluation Boards

Part Number Title Sort ascending
EVK-UFT281-2-3 UFT 3G Evaluation Kit For 8T49N281I, 8T49N282I and 8T49N283I