FemtoClock NG Universal Frequency Translator (2-in/1-PLL/8-out)

The 8T49N285 has one fractional-feedback PLL that can be used as a frequency translator with jitter attenuation or a frequency synthesizer. It is equipped with six integer and two fractional output dividers, allowing the generation of up to eight different output frequencies, ranging from 8 kHz to 1 GHz. Output frequencies can be completely independent of the input frequencies, and up to three of these frequencies can be completely independent of each other.The eight outputs may select among LVPECL, LVDS, HCSL or LVCMOS output levels.

The 8T49N285 is ideal for use in a wide range of equipment, including 10G/40G/100G SONET/SDH and Ethernet network line cards, wireless base station baseband units, broadcast video, carrier Ethernet switches, OTN, or in test and measurement applications. For example, the 8T49N285 can be used in GbE/10GbE/100GbE Synchronous Ethernet line card applications in order to preserve the G.8262 compliance from the Synchronous Equipment Timing Source (SETS) on the timing card.

IDT’s third generation Universal Frequency Translator family also includes the 8T49N286 (4-in / 2-PLL / 8-out), and 8T49N287 (2-in / 2-PLL / 8-out), and the 8T49N242 (2-in / 1-PLL / 4-out). These devices are complemented by the 82P33714 and 82P33731 synchronous equipment timing source (SETS) for Synchronous Ethernet (SyncE) and 10G-40G SyncE, respectively.

Features

  • Supports GR.1244 Stratum 3 stability in holdover mode
  • Compliant with the requirements outlined in Telcordia GR-253-CORE (SONET) & ITU-T G.813/G.8262 (SDH/SONET & SyncE) when paired with a Synchronous Equipment Timing Source (SETS ) device
  • Generates up to 8 LVPECL / LVDS/HCSL or 16 LVCMOS output clocks ranging from 8 kHz up to 1.0 GHz (diff), 8 kHz to 250 MHz (LVCMOS), that meet jitter limits for 10G up to 100G Ethernet and STM-256/OC-768 applications
    • 0.3ps RMS (including spurs), 12 kHz to 20 MHz
    • Accepts up to two LVPECL, LVDS, LVHSTL, HCSL or LVCMOS input clocks ranging from 8 kHz up to 875 MHz
    • 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 10 MHz to 40 MHz fundamental-mode crystal
  • Register programmable through I2C / SPI or via external I2C EEPROM
  • 8T49N285-998 “Boot from EEPROM”
  • 8T49N285-999 “powers up disabled”
  • 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
8T49N285A-999NLGI Active NLG56P2 VFQFPN 56 I Yes Tray Availability
8T49N285A-999NLGI8 Active NLG56P2 VFQFPN 56 I Yes Reel Availability
8T49N285A-998NLGI Active NLG56P2 VFQFPN 56 I Yes Tray Availability
8T49N285A-998NLGI8 Active NLG56P2 VFQFPN 56 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
8T49N285 Datasheet Datasheet PDF 1.26 MB Sep 8, 2017
IDT Products for Wired Broadband Applications Application Briefs PDF 686 KB Sep 1, 2017
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-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-865 8T49N285_6_7 Frequency Synchronization Compliance Report Application Note PDF 1.04 MB Oct 28, 2015
AN-872 How to Setup UFT3G Devices as a Zero Delay Buffer (ZDB) Application Note PDF 442 KB Nov 16, 2014
AN-871 Generating SyncE Line Cards Using IDT UFT3G Application Note PDF 688 KB Oct 31, 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-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# : W1512-01 Wafer Size change from 200mm to 300mm at Global Foundries Product Change Notice PDF 188 KB Jan 2, 2016
Other
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
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 Products for Radio Applications 日本語 Product Brief PDF 2.34 MB Nov 29, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016
Flexible Solutions for Fast Edge Rate and Low Phase Noise Requirements Overview PDF 154 KB Jul 1, 2016
UFT SyncE Product Brief 日本語, 简体中文 Product Brief PDF 132 KB Dec 14, 2014
IDT Jitter Attenuator Product Overview 简体中文 Overview PDF 1.95 MB Oct 22, 2014
IDT Clocks for Xilinx Ultrascale FPGAs Technical Brief PDF 256 KB Apr 25, 2016
IDT Clocks for Altera's Stratix V and Arria V/X FPGAs Technical Brief PDF 238 KB Feb 7, 2016
IDT Clocks for SMPTE and Xilinx® 7 Series FPGAs Technical Brief PDF 566 KB Oct 19, 2015

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
8T49N285 IBIS Model Model - IBIS ZIP 382 KB Dec 7, 2014

Evaluation Boards

Part Number Title Sort ascending
EVK-UFT285-6-7 Evaluation Kit for 8T49N285, 8T49N286, 8T49N287