FemtoClock® Crystal-to-CML Clock Generator

The ICS845264I is a 3.3V, 2.5V CML clock generator designed for Ethernet applications. The device synthesizes four clock frequencies on two separately selectable output banks. Each bank has either a 62.5MHz, 125MHz, 156.25MHz or 312.5MHz clock signal with excellent phase jitter performance. Each clock frequency is distributed to two low-skew differential CML output banks with a total of four outputs. The device is suitable for driving the reference clocks of Ethernet PHYs. The device supports 3.3V and 2.5V voltage supply and is packaged in a small, lead-free (RoHS 6) 32-lead VFQFN package. The extended temperature range supports telecommunication, wireless infrastructure and networking end equipment requirements.

Features

  • Clock generation of: 62.5MHz, 125MHz, 156.25MHz and 312.5MHz
  • Two banks of two differential CML clock outputs
  • Crystal interface designed for 25MHz, 12pF parallel resonant crystal
  • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz – 20MHz): 0.486ps (typical)
  • Offset Single-side Band Phase Noise
100Hz ............................-97 dBc/Hz
1kHz...............................-118 dBc/Hz
10kHz.............................-125 dBc/Hz
100kHz...........................-123 dBc/Hz
  • LVCMOS interface levels for the control inputs
  • Full 3.3V and 2.5V supply voltage
  • Lead-free (RoHS 6) 32 VFQFN packaging
  • -40°C to 85°C ambient operating temperature

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
845264AKILF Active NLG32P1 VFQFPN 32 I Yes Tray Availability
845264AKILFT Active NLG32P1 VFQFPN 32 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS845264I Datasheet Datasheet PDF 288 KB Jul 24, 2015
Other
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB Nov 29, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016

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