Overview

Description

The 840N022I is a LVCMOS/LVTTL clock synthesizer designed for Ethernet applications. The device generates a selectable 125MHz or 62.5MHz 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
  • 125MHz output clock synthesized from a 25MHz fundamental mode crystal
  • One LVCMOS/LVTTL clock output
  • Crystal interface designed for 25MHz, 12pF parallel resonant crystal
  • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.148ps (maximum)
  • RMS phase jitter @ 125MHz, using a 25MHz crystal (12kHz - 20MHz): 0.479ps (maximum)
  • LVCMOS interface levels for the control inputs
  • Full 2.5V or 3.3V supply voltage
  • Available in lead-free (RoHS 6) package
  • -40°C to 85°C ambient operating temperature

Comparison

Applications

Documentation

Design & Development

Models