Skip to main content

8T49N242

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 Specification

Phase Jitter Typ RMS (ps)Inputs (#)Input TypeInput Freq (MHz)Outputs (#)Output Voltage (V)Output Freq Range (MHz)Output Type
0.2762LVCMOS, HCSL, LVHSTL, LVTTL, LVPECL, LVDS0.008000 - 875.00000041.8, 2.5, 3.30.008000 - 1000.000000LVCMOS, LVDS, HCSL, LVPECL

Product Options

This device is customizable. Choose from the options below, or use the Custom Part Configuration Utility now.
Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8T49N242-006NLGIActiveNLG40P2VFQFPN40IYesTrayCheck Availability
8T49N242-006NLGI8ActiveNLG40P2VFQFPN40IYesReelCheck Availability
8T49N242-998NLGIActiveNLG40P2VFQFPN40IYesTrayCheck Availability
8T49N242-998NLGI8ActiveNLG40P2VFQFPN40IYesReelCheck Availability
8T49N242-999NLGIActiveNLG40P2VFQFPN40IYesTrayCheck Availability
8T49N242-999NLGI8ActiveNLG40P2VFQFPN40IYesReelCheck Availability

Documents

Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
no-lock
8T49N242 Datasheet Datasheet PDF 1.50 MB Sep 9, 2016
no-lock
8T49N242-006 Datasheet Addendum Short Form Datasheet PDF 46 KB Apr 18, 2016
User Guides & Manuals
no-lock
FemtoNG Universal Frequency Translator Ordering Product Information Guide Manual - User Reference PDF 216 KB Sep 9, 2016
no-lock
8T49N24x_EvalBoard_UserGuide.pdf Manual - Eval Board PDF 1.19 MB Aug 7, 2015
no-lock
Timing Commander Installation Guide Guide PDF 497 KB Oct 7, 2013
Apps Notes & White Papers
no-lock
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
no-lock
8T49N24x EEPROM Programming Guide Application Note PDF 433 KB Aug 7, 2015
no-lock
8T49N24x Powerup Configuration Guide Application Note PDF 39 KB Aug 7, 2015
show all (26)
no-lock
8T49N24x Frequency Programming Guide Application Note PDF 113 KB Aug 7, 2015
locked
AN-893 8T49N241_2 Frequency Synchronization Compliance Report Application Note PDF 1.02 MB Jul 7, 2015
no-lock
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
no-lock
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
no-lock
AN-846 Termination - LVDS Application Note PDF 50 KB May 13, 2014
no-lock
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
no-lock
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
no-lock
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 8, 2014
no-lock
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
no-lock
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
no-lock
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
no-lock
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
no-lock
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 6, 2014
no-lock
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
no-lock
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
no-lock
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 6, 2014
no-lock
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 5, 2014
no-lock
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
no-lock
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
no-lock
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
no-lock
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 15, 2014
no-lock
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 15, 2014
no-lock
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PCNs & PDNs
no-lock
PCN# : W1512-01 Wafer Size change from 200mm to 300mm at Global Foundries Product Change Notice PDF 188 KB Jan 3, 2016
Other
no-lock
Flexible Solutions for Fast Edge Rate and Low Phase Noise Requirements Overview PDF 154 KB Jul 1, 2016
no-lock
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
no-lock
IDT Clocks for Xilinx Ultrascale FPGAs Technical Brief PDF 256 KB Apr 25, 2016
show all (12)
no-lock
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016
no-lock
IDT Clocks for Altera's Stratix V and Arria V/X FPGAs Technical Brief PDF 238 KB Feb 8, 2016
no-lock
IDT Clocks for SMPTE and Xilinx® 7 Series FPGAs Technical Brief PDF 566 KB Oct 20, 2015
no-lock
82P33714/31 SETS and 8T49N24x Universal Frequency Translators Product Brief Product Brief PDF 370 KB Aug 11, 2015
no-lock
8T49N241/8T49N242 Universal Frequency Translators Product Brief Product Brief PDF 571 KB Aug 11, 2015
no-lock
8T49N24x Design Files (Schematic Symbol and PCB Footprint) PCB Design Files ZIP 12 KB Aug 7, 2015
no-lock
8T49N24x Example Timing Commander Configuration and Phase Noise Plots Miscellaneous ZIP 1.04 MB Aug 7, 2015
no-lock
8T49N24x EVB Schematic Schematic PDF 74 KB Aug 7, 2015
no-lock
IDT Jitter Attenuator Product Overview 简体中文 Overview PDF 1.95 MB Oct 23, 2014

Software & Tools

Title Type Format File Size Datesort icon
no-lock
8T49N242 IBIS Model Model - IBIS ZIP 331 KB Aug 7, 2015
no-lock
Timing Commander Installer v1.7.3.3 Software ZIP 17.87 MB May 12, 2016
no-lock
8T49N24x Timing Commander Personality File Software Tool TCP 2.06 MB Mar 11, 2016

Related Videos

  • 2015-09-28 8T49N241/2: Universal Frequency Translators...
  • 2016-03-06 8T49N242 Universal Frequency Translator...

Evaluation Boards