The IDT8T49N222I is a highly flexible FemtoClock® NG general purpose, low phase noise Frequency Translator / Synthesizer with alarm and monitoring functions suitable for networking and communications applications. It is able to generate any output frequency in the 7.68MHz to 1200MHz range. A wide range of input reference clocks and a range of low-cost fundamental mode crystal frequencies may be used as the source for the output frequency.

To see other devices in this product family, visit the Universal Frequency Translators page.

Features

  • Universal Frequency Translator
    • Zero ppm frequency translation
  • Two outputs, individually programmable as LVPECL or LVDS
    • Individually programmable output frequencies: 7.68MHz up to 1200MHz
  • Two differential inputs support the following input types: LVPECL, LVDS, LVHSTL, HCSL
    • Input frequency range: 8kHz to 710MHz
  • Hitless switching between inputs
  • Holdover support in the event both inputs fail
  • One factory-set register configuration for power-up default state
  • RMS phase jitter at 125MHz, using a 40MHz crystal (12kHz - 20MHz):
    • 498fs (typical), Low Bandwidth Mode (FracN)

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 48 I Yes Tray
Availability
Active VFQFPN 48 I Yes Tray
Availability
Active VFQFPN 48 I Yes Reel
Availability
Active VFQFPN 48 I Yes Tray
Availability
Active VFQFPN 48 I Yes Reel
Availability
Active VFQFPN 48 I Yes Tray
Availability
Active VFQFPN 48 I Yes Reel
Availability
Active VFQFPN 48 I Yes Tray
Availability
Active VFQFPN 48 I Yes Reel
Availability
Active VFQFPN 48 I Yes Tray
Availability
Active VFQFPN 48 I Yes Reel
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
8T49N222I Datasheet Datasheet PDF 788 KB
User Guides & Manuals
FemtoNG Universal Frequency Translator Ordering Product Information Guide Manual - User Reference PDF 270 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-831 The Crystal Load curve Application Note PDF 395 KB
AN-846 Termination - LVDS Application Note PDF 133 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 115 KB
AN-839 RMS Phase Jitter Application Note PDF 233 KB
AN-832 Timing Budget and Accuracy Application Note PDF 131 KB
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 180 KB
AN-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 133 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 120 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 160 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 143 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 136 KB
AN-801 Crystal-High Drive Level Application Note PDF 202 KB
AN-806 Power Supply Noise Rejection Application Note PDF 438 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
AN-803 Crystal Timing Budget and Accuracy for Renesas Timing Clock Products Application Note PDF 108 KB
PCNs & PDNs
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB
PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB
Downloads
8T49N222I IBIS Model Model - IBIS ZIP 205 KB
Other
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
Timing Fabric for Communications Equipment Overview Overview PDF 263 KB