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8V89308I - Block Diagram
8V89308I - Pinout

8V89308I

Jitter Attenuator & Femtoclock® Multiplier

The IDT8V89308I is a PLL based synchronous multiplier specifically designed for applications utilizing Broadcom PHYs and Switches. This high performance device is optimized for Ethernet / SONET PDH frequency translation and clock jitter attenuation. The device contains two internal frequency multiplication stages that are cascaded in series. The first stage is a low bandwidth PLL that is optimized to provide reference clock jitter attenuation. The second stage is a FemtoClock® frequency multiplier that provides the low jitter, high frequency Ethernet output clock that easily meets Gigabit and 10 Gigabit Ethernet jitter requirements. Pre-divider and output divider multiplication ratios are selected using device selection control pins. The multiplication ratios are optimized to support most common clock rates used in Ethernet, SONET, PDH applications. IDT8V89308I requires the use of an external, inexpensive fundamental mode crystal and uses external passive loop filter components which allows configuration of the PLL loop bandwidth and damping characteristics. The device is packaged in a space-saving 32-VFQFN package and supports industrial temperature range.

Features

  • Two LVPECL output pairs Each output supports independent frequency selection at 25MHz, 125MHz and 156.25MHz
  • One differential input supports the following input types: LVPECLLVDS
  • Accepts input frequencies 8kHz, 25MHz,125MHz and 155.52MHz
  • First stage PLL bandwidth can be optimized for jitter attenuation and reference tracking using external loop filter connection
  • FemtoClock frequency multiplier provides low jitter, high frequency output
  • Absolute pull range: 50ppm
  • FemtoClock VCO frequency: 625MHz
  • RMS phase jitter @ 25MHz, using a 25MHz crystal (12kHz ‘- 5MHz): 0.238ps (typical), 0.30ps (maximum)
  • RMS phase jitter @ 125MHz, using a 25MHz crystal (12kHz ‘- 20MHz): 0.223ps (typical), 0.30ps (maximum)
  • RMS phase jitter @ 156.25MHz, using a 25MHz crystal (12kHz ‘- 20MHz): 0.223ps (typical), 0.30ps (maximum)
  • 3.3V supply voltage
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)Output Skew (ps)Phase Jitter Typ RMS (ps)Phase Jitter Max RMS (ps)
2LVPECL25.000000 - 156.2500000.008000 - 155.5200001LVDS, LVPECL23.33.3250.2230.300

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8V89308ANLGIActiveNLG32P3VFQFPN32IYesTrayCheck Availability
8V89308ANLGI8ActiveNLG32P3VFQFPN32IYesReelCheck Availability

Documents

Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
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8V89308I Data Sheet Datasheet PDF 603 KB Jun 21, 2012
Apps Notes & White Papers
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AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
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AN-861 Recommended Crystals for IDT VCXO-based Synchronization PLLs Application Note PDF 215 KB Apr 21, 2015
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AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
show all (16)
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AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
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AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
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AN-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
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AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
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AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
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AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
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AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 5, 2014
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AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
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AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
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AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
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AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 15, 2014
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AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 15, 2014
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AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PCNs & PDNs
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PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 28, 2016
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PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
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PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB Sep 11, 2013
show all (4)
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PCN# : N1302-01 Die revision change Product Change Notice PDF 55 KB Feb 25, 2013
Other
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IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
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IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016

Software & Tools

Title Type Format File Size Datesort icon
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8V89308I 3.3V IBIS Model Model - IBIS ZIP 45 KB Nov 24, 2014