Overview

The 844S0258-07 is an eight output synthesizer optimized to generate Gigabit and 10 Gigabit Ethernet clocks. Using a 25MHz, 18pF parallel resonant crystal, the device will generate 125MHz clocks with mixed LVDS and LVCMOS/ LVTTL output levels. 844S0258-07 uses IDT's 3rd generation low phase noise VCO technology and can achieve <1ps typical RMS phase jitter, easily meeting Ethernet jitter requirements. 844S0258-07 is packaged in a small, 32-pin VFQFN package that is optimum for applications with space limitations.

844S0258-07 - Block Diagram
844S0258-07 - Pinout
844S0258-07 - Block Diagram
844S0258-07 - Pinout
  • 7 LVDS differential output at 125MHz
  • 1 LVCMOS/LVTTL single-ended outputs at 125MHz
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input and PLL bypass from a single select pin
  • Output enable signal for three LVDS outputs
  • RMS phase jitter @ 125MHz, using a 25MHz crystal
  • (1.857MHz - 20MHz): 0.278ps (typical)
  • PCI Express (2.5Gb/s) and Gen 2 (5 Gb/s) jitter compliant
  • Full 3.3V supply mode
  • 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.

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Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    844S0258CK-07LF
    circleObsolete
    memory
    view_in_ar
    		VFQFPN 32 C Yes Tray
    844S0258CK-07LFT
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    memory
    view_in_ar
    		VFQFPN 32 C Yes Reel
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