Overview

The 844246D is a Crystal-to-LVDS Clock Synthesizer/Fanout Buffer designed for Fibre Channel frequencies and Gigabit Ethernet applications. The output frequency can be set using the frequency select pins and a 25MHz crystal for Ethernet frequencies, or a 26.5625MHz crystal for a Fibre Channel. The low phase noise characteristics of the 844246D make it an ideal clock for these demanding applications.
844246D - Block Diagram
844246D - Pinout
844246D - Block Diagram
844246D - Pinout
  • Six LVDS output pairs
  • Crystal oscillator interface
  • Output frequency range: 50MHz to 333.3333MHz
  • Crystal input frequency range: 25MHz to 33.333MHz
  • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.416ps (typical)
  • Full 3.3V or mixed 3.3V core, 2.5V output supply modes
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

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.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    844246DGLF
    circleObsolete
    memory
    view_in_ar
    		TSSOP 24 C Yes Tube
    844246DGLFT
    circleObsolete
    memory
    view_in_ar
    		TSSOP 24 C Yes Reel
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