Overview

Description

The ICS840N051I is a LVCMOS/LVTTL clock synthesizer designed for SDH/SONET and Ethernet applications. The device generates a selectable 156.25MHz or 77.76MHz clock signal with excellent phase jitter performance. The device uses IDT’s fourth generation FemtoClock® NG technology for an optimum of high clock frequency, low phase noise performance and low power consumption.The device supports 2.5V or 3.3V voltage supply and is packaged in a small, lead-free (RoHS 6) 8-lead TSSOP package. The extended temperature range supports wireless infrastructure, telecommunication and networking end equipment requirements.

Features

 

  • Fourth generation FemtoClock® NG technology 
  • 155.52MHz output clock synthesized from a 19.44MHz fundamental mode crystal 
  • One 2.5V or 3.3V LVCMOS/LVTTL clock output
  • Crystal interface designed for a 12pF parallel resonant crystal
  • RMS phase jitter @ 155.52MHz, using a 19.44MHz crystal (12kHz - 20MHz): 0.482ps (maximum) 
  • RMS phase jitter @ 156.25MHz, using a 19.53125MHz crystal (1.875MHz - 20MHz): 0.138ps (maximum) 
  • LVCMOS interface levels for the control inputs
  • Full 2.5V or 3.3V supply voltage
  • Lead-free (RoHS 6) packaging 
  • -40°C to 85°C ambient operating temperature

Comparison

Applications

Documentation

Design & Development

Models