The 8T49N012 is a high performance Clock Generator with selectable LVPECL or Single-ended outputs. The 8T49N012 can generate selectable frequencies from a crystal or a single-ended reference clock. The frequency is selected from the Frequency Selection Table.
 
Excellent phase noise performance is maintained with IDT’s Fourth Generation FemtoClock® NG PLL technology.

Features

  • Fourth Generation FemtoClock NG PLL technology
  • Three differential output banks:
    Bank A: selectable between four pairs of LVPECL or four pairs
                  of complementary LVCMOS/LVTTL outputs
    Bank B: two pairs of LVPECL outputs
    Bank C: six pairs of LVPECL outputs
  • Selectable clock input or crystal input.
  • Supports 25MHz fundamental crystal or 25MHz, 50MHz,
    66.67MHz clock input
  • Selectable 156.25MHz, 125MHz, 100MHz clock for Bank B and
    Bank C outputs
  • Selectable 156.25MHz, 125MHz, 100MHz, 250MHz, 312.5MHz,
    50MHz, 25MHz, 62.5MHz or 78.125MHz for Bank A outputs
  • PLL lock indication (LVCMOS output)
  • RMS phase jitter at 156.25MHz (12kHz - 20MHz): 0.199ps (typical)
  • Power supply modes:
    Core / Output
    3.3V / 3.3V
    3.3V / 2.5V
    2.5V / 2.5V
  • -40°C to 85°C ambient operating temperature
  • 56-Lead VFQFN
  • Lead-free (RoHS 6) packaging

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Package Buy Sample
8T49N012NLGI Active VFQFPN 56 I Yes Tray Package Info
Availability
8T49N012NLGI8 Active VFQFPN 56 I Yes Reel Package Info
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
8T49N012 Datasheet Datasheet PDF 751 KB
User Guides & Manuals
Programmable FemtoClock Ordering Product Information Manual PDF 140 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-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 128 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-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-832 Timing Budget and Accuracy Application Note PDF 131 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
PCNs & PDNs
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
Other
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB