VCXO-Based Line Card Clock Synchronizer

The MK2069-01 is a VCXO (Voltage Controlled Crystal Oscillator) based clock generator that offers system synchronization, jitter attenuation, and frequency multiplication or translation. It can accept an unstable, jittery input clock and provide a de-jittered, low phase noise output clock at a user determined frequency. The device's clock multiplication ratios are user selectable since all major PLL divider blocks can be configured through device pin settings. External PLL loop filter components allow tailoring of the VCXO PLL loop response and therefore the clock jitter attenuation characteristics. The MK2069-01 is ideal for line card applications. Its three input MUX enables selection of the master or slave (backup) system clocks, as well as a backup local line card clock. The lock detector (LD) output serves as a clock status monitor. The clear (CLR) input enables rapid synchronization to the phase of a newly selected input clock, while eliminating the generation of extra clock cycles and wander caused by memory in the PLL feedback divider. CLR also serves as a temporary holdover function when kept low.

Features

  • Input clock frequency of 1 kHz to 170 MHz
  • Output clock frequency of 500 kHz to 160 MHz
  • Jitter attenuation of input clock provided by VCXO circuit. Jitter transfer characteristics user configured through selection of external loop filter components.
  • 3:1 Input MUX for input reference clocks
  • PLL lock status output
  • PLL Clear function allows seamless synchronizing to an altered input clock phase, virtually eliminating the generation of wander or extra clock cycles.
  • VCXO-based clock generation offers very low jitter and phase noise generation, even with a low frequency or jittery input clock.
  • 2nd PLL provides translation of VCXO PLL output (VCLK) to higher or alternate clock frequencies (TCLK).
  • Device will free-run in the absence of an input clock based on the VCXO crystal frequency.
  • 56 pin TSSOP package
  • Single 3.3 V power supply
  • 5 V tolerant inputs on ICLK0 and ICLK1

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
MK2069-01GILF Obsolete PAG56 TSSOP 56 I Yes Tube Availability
MK2069-01GILFTR Obsolete PAG56 TSSOP 56 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
MK2069-01 Datasheet Datasheet PDF 211 KB Sep 7, 2010
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-841 Pullable Crystal Selection and VCXO Tuning Application Note PDF 248 KB Sep 23, 2014
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
Using IDT's Integrated VCXO Products MAN05 Application Note PDF 69 KB Jun 5, 2012
AN-800 Approved VCXO Crystals Application Note PDF 63 KB Jan 27, 2014
AN-849 Loop Filter Component Selection for VCXO Based PLLs Application Note PDF 132 KB May 13, 2014
AN-848 VCXO - Crystal Selection Application Note PDF 138 KB May 13, 2014
AN-847 VCXO - Absolute Pull Range Application Note PDF 70 KB May 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 6, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 6, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 4, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 11, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 14, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 14, 2014
PCNs & PDNs
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 27, 2016
PDN# : MM-15-05 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 531 KB Nov 12, 2015
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 12, 2015
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 21, 2015
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 20, 2015
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 23, 2013
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB Dec 20, 2012
PCN#: TB-0510-05 New Shipping Tube for TSSOP/TVSOP/TSSOP Exposed Product Change Notice PDF 201 KB Dec 12, 2005
Other
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 Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016
PLL External Loop Filter Calculator Engineering ZIP 19 KB Jun 17, 2013
External Loop Filters Solver Engineering ZIP 22 KB Jun 17, 2013

Software & Tools

Title Other Languages Type Format File Size Date
MK2069-01 3.3V IBIS Model Model - IBIS ZIP 4 KB Mar 13, 2006
MK2069-04 3.3V IBIS Model Model - IBIS ZIP 4 KB Mar 13, 2006

News & Additional Resources