General Description

The MAX3679A is a low-jitter precision clock generator with the integration of three LVPECL and one LVCMOS outputs optimized for Ethernet applications. The device integrates a crystal oscillator and a phase-locked loop (PLL) clock multiplier to generate high-frequency clock outputs for Ethernet applications.

Features

♦ Crystal Oscillator Interface: 25MHz

♦ CMOS Input: 25MHz

♦ Output Frequencies for Ethernet

    62.5MHz, 125MHz, 156.25MHz, 312.5MHz

♦ Low Jitter

    0.14psRMS (1.875MHz to 20MHz)

    0.36psRMS (12kHz to 20MHz)

♦ Excellent Power-Supply Noise Rejection

♦ No External Loop Filter Capacitor Required

Applications

    Ethernet Networking Equipment