Overview

The 8433625 is a 3 differential output LVPECL Synthesizer designed to generate Ethernet reference clock frequencies and is a member of the family of high performance clock solutions from IDT. Using a 25MHz or 26.041666MHz, 18pF parallel resonant crystal, the following frequencies can be generated based on the settings of 4 frequency select pins (DIV_SELA[1:0], DIV_SELB[1:0]): 625MHz, 312.5MHz, 156.25MHz, and 125MHz. The 8433625 has 2 output banks, Bank A with 1 differential LVPECL output pair and Bank B with 2 differential LVPECL output pairs. The two banks have their own dedicated frequency select pins and can be independently set for the frequencies mentioned above. The 8433625 uses IDT's 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical rms phase jitter, easily meeting Ethernet jitter requirements. The 8433625 is packaged in a small 24-pin TSSOP package.

8433625 - Block Diagram
8433625 - Pinout
8433625 - Block Diagram
8433625 - Pinout
  • Three 3.3V LVPECL outputs on two banks, A Bank with one LVPECL pair and B Bank with 2 LVPECL output pairs
  • Using a 25MHz or 26.041666 crystal, the two output banks can be independently set for 625MHz, 312.5MHz, 156.25MHz or 125MHz
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input
  • VCO range: 520MHz – 680MHz
  • RMS phase jitter @ 156.25MHz (1.875MHz - 20MHz): 0.3ps (typical)
  • 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
    8433625AGLF
    circleObsolete
    memory
    view_in_ar
    		TSSOP 24 C Yes Tube
    8433625AGLFT
    circleObsolete
    memory
    view_in_ar
    		TSSOP 24 C Yes Reel
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