Overview

The 840002 is a 2 output LVCMOS/LVTTL Synthesizer optimized to generate Fibre Channel reference clock frequencies. Using a 26.5625MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL1:0): 212.5MHz, 159.375MHz, 156.25MHz, 106.25MHz, and 53.125MHz. The 840002 uses low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Fibre Channel jitter requirements. The 840002 is packaged in a 16-pin TSSOP package.

840002 - Block Diagram
840002 - Pinout
840002 - Block Diagram
840002 - Pinout
  • Two LVCMOS outputs @ 3.3V, 17Ω typical output impedance
  • Selectable crystal oscillator interface or LVCMOS single-ended input
  • Output frequency range: 46.66MHz - 233.33MHz
  • VCO range: 560MHz - 700MHz
  • Supports the following output frequencies: 212.5MHz, 159.375MHz, 156.25MHz, 106.25MHz and 53.125MHz
  • RMS phase jitter @ 212.5MHz (637kHz - 10MHz): 0.83ps (typical)
    Typical phase noise at 212.5MHz:
    Offset                   Noise Power
      100Hz ............... -91.3 dBc/Hz
        1kHz ............. -114.3 dBc/Hz
      10kHz ............. -120.7 dBc/Hz
    100kHz ............. -120.2 dBc/Hz
  • Full 3.3V or 3.3V core/2.5V output supply modes
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free RoHS compliant 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
    840002AGLF
    circleObsolete
    memory
    view_in_ar
    		TSSOP 16 C Yes Tube
    840002AGLFT
    circleObsolete
    memory
    view_in_ar
    		TSSOP 16 C Yes Reel
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