Overview

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 Renesas’ fourth-generation FemtoClock™ NG PLL technology.

8T49N012I - Block Diagram
8T49N012I - Pin Assignment
8T49N012I - Block Diagram
8T49N012I - Pin Assignment
  • 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, and 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 to 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

Documentation

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
    Moisture Sensitivity Level (MSL)
    Price (USD) | 1ku
    Buy / Sample
    Part Number
    8T49N012NLGI
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    		VFQFPN 56 I Yes Tray 3 21.97
    8T49N012NLGI8
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