FemtoClock®NG Universal Frequency Translator

The 8T49N242 has one fractional-feedback PLL that can be used as a frequency translator with jitter attenuation or a frequency synthesizer. It is equipped with four integer output dividers, allowing the generation of up to four different output frequencies, ranging from 8 kHz to 1 GHz. Output frequencies can be completely independent of the input frequencies. The four outputs may select among LVPECL, LVDS, HCSL or LVCMOS output levels.

The 8T49N242 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 8T49N242 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 8T49N241 (2-in / 1-PLL / 4-out), the 8T49N285 (2-in / 1-PLL / 8-out), the 8T49N286 (4-in / 2-PLL / 8-out) and the 8T49N287 (2-in / 2-PLL / 8-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

• 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 4 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 25G Ethernet applications
• 0.276ps 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 50 MHz
• Register programmable through I2C or via external I2C EEPROM
• 8T49N242-998 “Boot from EEPROM”
• 8T49N242-999 “powers up disabled”
• Supported by IDT Timing Commander Software

Product Options

Choose from the options below, or use the Custom Part Configuration Utility.
Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
8T49N242-006NLGI Active NLG40P2 VFQFPN 40 I Yes Tray Availability
8T49N242-006NLGI8 Active NLG40P2 VFQFPN 40 I Yes Reel Availability
8T49N242-998NLGI Active NLG40P2 VFQFPN 40 I Yes Tray Availability
8T49N242-998NLGI8 Active NLG40P2 VFQFPN 40 I Yes Reel Availability
8T49N242-999NLGI Active NLG40P2 VFQFPN 40 I Yes Tray Availability
8T49N242-999NLGI8 Active NLG40P2 VFQFPN 40 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
8T49N242 Datasheet Datasheet PDF 1.34 MB Oct 10, 2017
IDT Products for Wired Broadband Applications Application Briefs PDF 686 KB Sep 1, 2017
8T49N242-006 Datasheet Addendum Short Form Datasheet PDF 46 KB Apr 17, 2016
User Guides & Manuals
8T49N24x Evaluation Board User Guide Manual - Eval Board PDF 1.31 MB Jun 6, 2017
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
8T49N24x Power-Up Configuration Guide Application Note PDF 82 KB Jun 5, 2017
8T49N24x EEPROM Programming Guide Application Note PDF 498 KB Jun 5, 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-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
8T49N24x Frequency Programming Guide Application Note PDF 113 KB Aug 6, 2015
AN-893 8T49N241_2 Frequency Synchronization Compliance Report Application Note PDF 1.02 MB Jul 6, 2015
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 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
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
82P33714/31 SETS and 8T49N24x Universal Frequency Translators Product Brief Product Brief PDF 370 KB Aug 10, 2015
8T49N241/8T49N242 Universal Frequency Translators Product Brief 日本語 Product Brief PDF 571 KB Aug 10, 2015
8T49N24x Design Files (Schematic Symbol and PCB Footprint) PCB Design Files ZIP 12 KB Aug 6, 2015
8T49N24x Example Timing Commander Configuration and Phase Noise Plots Miscellaneous ZIP 1.04 MB Aug 6, 2015
8T49N24x EVB Schematic Schematic PDF 74 KB Aug 6, 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
8T49N24x Timing Commander Personality File Software Tool TCP 2.44 MB Jun 2, 2017
8T49N242 IBIS Model Model - IBIS ZIP 331 KB Aug 6, 2015

Evaluation Boards

Part Number Title Sort ascending
8T49N242-EVK Evaluation Kit for 8T49N242

News & Additional Resources