Overview

Description

The 843004-01 is a 4 output LVPECL synthesizer optimized to generate Ethernet reference clock frequencies and is a member of the family of high performance clock solutions from IDT. Using a 25MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the settings of 2 frequency select pins (F_SEL[1:0]): 156.25MHz, 125MHz, 62.5MHz. The 843004-01 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 843004-01 is packaged in a small 24-pin TSSOP package.

Features

  • Four 3.3V LVPECL outputs
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input
  • Supports the following output frequencies: 156.25MHz, 125MHz and 62.5MHz
  • VCO range: 560MHz - 680MHz
  • RMS phase jitter @ 156.25MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.57ps (typical)
  • RMS phase noise at 156.25MHz (typical)
    Phase noise:
    Offset                   Noise Power
    100Hz ................ -95.5 dBc/Hz
    1kHz .................. -118 dBc/Hz
    10kHz ................ -126 dBc/Hz
    100kHz .............. -126.6 dBc/Hz
  • Full 3.3V supply mode
  • -30°C to 85°C ambient operating temperature
  • Available in lead-free RoHS compliant package

Comparison

Applications

Documentation

Design & Development

Models