Overview

Description

The 840004-11 is a 4 output LVCMOS/LVTTL 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, 125MHz and 62.5MHz can be generated based on one frequency select pin (F_SEL). The 840004-11 uses IDT's 3rd generation low phase noise VCO technology and can achieve 1ps or lower typical random rms phase jitter, easily meeting Ethernet jitter requirements. The 840004-11 is packaged in a small 20-pin TSSOP package.

Features

  • Four single-ended LVCMOS/LVTTL outputs 17Ω typical output impedance
  • Crystal oscillator interface
  • Input frequency range: 22.4MHz to 28MHz
  • Output frequency range: 56MHz - 140MHz
  • VCO range: 560MHz - 700MHz
  • RMS phase jitter at 125MHz (1.875MHz – 20MHz): 0.70ps (typical)
    Phase Noise:
    Offset               Noise Power
    100Hz ............-95.5 dBc/Hz
    1kHz ..............-123.6 dBc/Hz
    10kHz.............-132.8 dBc/Hz
    100kHz ..........-133.4 dBc/Hz
  • Full 3.3V output supply mode
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Comparison

Applications

Documentation

Design & Development

Models