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VersaClock® III

VersaClock products allow designers to save board space and cost by replacing crystals, oscillators and buffers with a single timing device. Exceptional versatility and configurability allow for maximum freedom in the design process. There are four internal PLLs, each individually programmable, allowing for up to seven unique frequencies. These frequencies are generated from a single reference clock, which can come from one of two redundant clock inputs. A glitchless automatic or manual switchover function allows the redundant clock to be selected during normal operation.

Features

  • Four internal PLLs
  • Internal non-volatile EEPROM
  • Fast (400 kHz) mode I2C serial interface for device configuration
  • Output frequency range: 4.9 kHz to 500 MHz
  • Input clock frequency range: 1 MHz to 200 MHz
  • Reference crystal input with programmable linear load capacitance
  • Crystal frequency range: 8 to 50 MHz
  • Two PLLs support spread spectrum generation
 
  • Optional integrated VCXO
  • Each PLL has a 7-bit reference divider and a 12-bit feedback divider
  • 8-bit output divider clocks
  • Programmable loop bandwidth settings
  • -40 to +85C industrial temperature operation
  • I/O Standards:
         Outputs: 1.8/2.5/3.3 V LVTTL / LVCMOS (device dependent)
         Outputs: LVPECL, LVDS and HCSL
         Inputs: LVTTL / LVCMOS
  • Redundant clock input with glitch-less auto switchover

Additional Info:
► VersaClock III News Release - June 30, 2009
► IDT VersaClock III product brief - (PDF, June 2011)
► Evaluation Board Schematics for VersaClock III (PDF, Oct. 2009)
► Evaluation Board Setup Guide for VersdaClock III (PDF, Oct. 2009)
► Design Tip: Spread Sprectrum Clocking VersaClock III (PDF, March 2010)

VersaClock Software

Free Download: Software Features/Benefits:
  • Optimizes configurations
  • Automatic analysis and adjustment of spread spectrum, loop bandwidths and outputs
  • Clock-to-pin locking and multi-register configuration
  • Bit-level manipulation
  • Direct software interface with VersaClock III evaluation board
 

 

Software Requirements

 

This software calculates solutions for the VersaClock III family of programmable clocks. The configuration code generated by this software may be programmed through the I2C device port, enabling users to try out a variety of solutions with minimal turnaround time.


The VersaClock III devices do not need or have a programmer like the one used for the earlier parts. The parts may be programmed on the board through the I2C port in production.


Supported Platforms: 400 MHz Pentium II or later running Windows Vista, XP, 2000 and NT 4.0


Installation Requires: Microsoft Installer (MSI) Version 2.0. This is included with Windows Vista, XP and Windows 2000 SP3.

 

 

Parametric Search

Bookmark Toggle Controls Full Screen Reset
Part NumberInput Freq (MHz)Output Freq Range (MHz)Prog. ClockProg. InterfaceOutputs (#)C-C Jitter Max P-P (ps)Spread SpectrumXtal Freq (MHz)Lead Count (#)Supply Voltage (V)