FemtoClock® NG 12-Output Clock Generator

The 8V49NS0312 is a flexible Clock Generator with a total of four output dividers: three integer and one that is either integer or fractional. When used with an external crystal, the 8V49NS0312 generates high-performance timing geared towards the communications and datacom markets, especially for applications demanding extremely low phase noise, such as 10, 40 and 100GE. The device is offered in a lead-free 64-VFQFN package and is designed to operate across full industrial temperature range.                                                          

The 8V49NS0312 provides versatile frequency configurations and output formats and is optimized to deliver excellent phase noise performance. The device delivers an optimum combination of high clock frequency and low phase noise performance, combined with high-power supply noise rejection.   Flexibility and ease of programmability allow these devices to be used in a variety of clock trees while reducing engineering effort. The device is programmable through an I2C interface and also supports I2C master capability to allow the register configuration to be read from an external EEPROM. IDT’s Timing Commander™ software tool enables a fast and easy reconfiguration of the devices.

Features

  • Provides a total of 12 outputs: 11 differential (LVPECL or LVDS) and 1 LVCMOS on 3 integer and 1 integer or FracN divider
  • Low phase jitter: < 100 fs RMS Phase Jitter, 12 kHz to 20 MHz
  • Output frequencies from 10.91 MHz up to 2.5 GHz differential, 250 MHz LVCMOS
  • Flexible input options
    • 10 MHz to 50 MHz fundamental-mode crystal
    • Reference input from 5 MHz to 1 GHz
  • Flexibility 
    • One Time Programmable (OTP) non-volatile memory
  • Select configurations may be controlled via the use of control input pins without the need for serial port access
  • LVCMOS compatible I2C serial interface gives access to additional configurations either alone or in combination with the control input pins
  • -40°C to +85°C ambient operating temperature
  • Packaged in 64-pin VFQFN, lead-free RoHS (6)
  • 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
8V49NS0312NLGI Active NLG64P5 VFQFPN 64 I Yes Tray Availability
8V49NS0312NLGI8 Active NLG64P5 VFQFPN 64 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
8V49NS0312 Datasheet Datasheet PDF 1.29 MB Nov 14, 2017
User Guides & Manuals
Timing Commander Installation Guide Guide PDF 497 KB Oct 6, 2013
Application Notes & White Papers
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-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# : N1710-01 Datasheet change 8V49NS0312NLGI Product Change Notice PDF 102 KB Nov 7, 2017
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
8V49NS0312 FemtoClock NG 12-Output Clock Generator Product Brief PDF 362 KB Nov 29, 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
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
8V49NS0312, 8V4xNS0412 Timing Commander Personality File Software ZIP 2.08 MB Nov 16, 2017
8V49NS0312 IBIS Model Model - IBIS ZIP 169 KB Nov 2, 2017
Timing Commander Installer v1.9.3.8 Software ZIP 18.53 MB Jun 12, 2017

Evaluation Boards

Part Number Title Sort ascending
EVK-8V49NS0312 Evaluation Kit for 8V49NS0312