Clocks & Timing

Overview

The 8T49N006I is a six output Clock Generator with selectable LVDS or LVPECL outputs. The 8T49N006I can generate any one of four frequencies from a single crystal or reference clock. The four frequencies are selected from the Frequency Selection Table (Table 1) and are programmed via I2C interface. The four predefined frequencies are selected in the user application by two frequency selection pins. Note the desired programmed frequencies must be used with the corresponding crystal or clock frequency as indicated in Table 1. Excellent phase noise performance is maintained with Renesas’ Fourth Generation FemtoClock™ NG PLL technology, which delivers sub-400fs RMS phase jitter.

8T49N006I - Block Diagram
8T49N006I - Pinout
8T49N006I - Block Diagram
8T49N006I - Pinout
  • Fourth Generation FemtoClock NG PLL technology
  • Six selectable LVPECL or LVDS outputs via I2C
  • CLK, nCLK input pair can accept the following differential input levels: LVPECL, LVDS, HCSL
  • FemtoClock NG VCO Range: 1.91GHz - 2.5GHz
  • RMS phase jitter at 156.25MHz (12kHz - 20MHz): 228fs (typical)
  • Full 2.5V or 3.3V power supply
  • I2C programming interface
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package
  • 4-output (8T49N004I) and 8-output (8T49N008I) also available

Documentation

Title
Type 		Date
8T49N006I Datasheet
PDF 1.11 MB 		Datasheet
AN-805 Recommended Ferrite Beads
PDF 91 KB 		Application Note
AN-827 Application Relevance of Clock Jitter
PDF 1.99 MB 		Application Note
AN-828 Termination - LVPECL
PDF 322 KB 		Application Note
AN-831 The Crystal Load curve
PDF 395 KB 		Application Note
AN-844 Termination - AC Coupling Clock Receivers
PDF 170 KB 		Application Note
AN-846 Termination - LVDS
PDF 133 KB 		Application Note
AN-842 Thermal Considerations in Package Design and Selection
PDF 495 KB 		Application Note
AN-840 Jitter Specifications for Timing Signals
PDF 442 KB 		Application Note
AN-838 Peak-to-Peak Jitter Calculations
PDF 115 KB 		Application Note
AN-839 RMS Phase Jitter
PDF 233 KB 		Application Note
AN-832 Timing Budget and Accuracy
PDF 131 KB 		Application Note
AN-833 Differential Input Self Oscillation Prevention
PDF 180 KB 		Application Note
AN-834 Hot-Swap Recommendations
PDF 153 KB 		Application Note
AN-835 Differential Input with VCMR being VIH Referenced
PDF 160 KB 		Application Note
AN-836 Differential Input to Accept Single-ended Levels
PDF 120 KB 		Application Note
AN-837 Overdriving the Crystal Interface
PDF 133 KB 		Application Note
AN-830 Quartz Crystal Drive Level
PDF 143 KB 		Application Note
AN-815 Understanding Jitter Units
PDF 565 KB 		Application Note
AN-802 Crystal-Measuring Oscillator Negative Resistance
PDF 136 KB 		Application Note
AN-801 Crystal-High Drive Level
PDF 202 KB 		Application Note
AN-806 Power Supply Noise Rejection
PDF 438 KB 		Application Note
AN-803 Crystal Timing Budget and Accuracy for Renesas Timing Clock Products
PDF 108 KB 		Application Note
Programmable FemtoClock Ordering Product Information
PDF 140 KB 		Manual - Hardware
IDT Clock Generation Overview
PDF 1.83 MB 		Overview
PCN# : 220015 (R1) Add Alternate Assembly Location on VFQFPN Packages
PDF 734 KB 		Product Change Notice
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility
PDF 983 KB 		Product Change Notice
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location
PDF 583 KB 		Product Change Notice
PCN# : W1308-01 Change of Passivation Thickness
PDF 941 KB 		Product Change Notice
IDT Clocks for Xilinx Ultrascale FPGAs
PDF 256 KB 		Technical Brief
IDT Clocks for Altera's Stratix V and Arria V/X FPGAs
PDF 238 KB 		Technical Brief
31 items

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

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Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    8T49N006A-000NLGI
    play_circleActive
    memory
    view_in_ar
    Samples Available
    		 VFQFPN 40 I Yes Tray Get Samples,
    8T49N006A-999NLGI
    play_circleActive
    memory
    view_in_ar
    Samples Available
    		 VFQFPN 40 I Yes Tray Get Samples,
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