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83PN161I - Block Diagram
83PN161I - Pinout


Programmable FemtoClock® NG Differential-to-3.3V,2.5V LVPECL Synthesizer

Alternative Products
NOTICE - The following device(s) are recommended alternatives:

The 83PN161i is LVPECL output synthesizer designed for converting forward-error correction (FEC) clock frequencies in 10 GB Ethernet LAN/WAN transport applications. The device is optimized for an input frequency of 156.25MHz and supports four FEC rate conversions: 33/32, 255/237, 255/238 and 235/236. The conversion rate is pin-selectable and one of four rates are supported at a time. In the default configuration, an input clock of 156.25MHz is converted to an output clock of 168.8294492MHz (255/236). The device uses IDT's fourth Generation of FemtoClock® NG technology to deliver low phase noise clocks combined with a low power consumption. The RMS phase jitter at 168.8294492MHz output frequency is 0.533ps (12kHz-20MHz integration range).


  • Fourth Generation FemtoClock® Next Generation (NG) technology
  • Footprint compatible with 5mm x 7mm differential oscillators
  • 10 Gb Ethernet LAN/WAN FEC clock converter
  • Supports 33/32, 255/237, 255/238, 255/236 rate conversions
  • Optimized for an input clock frequency of 156.25MHz
  • One differential LVPECL output pair
  • CLK, nCLK input pair can accept the following levels: HCSL, LVDS, LVPECL, LVHSTL and SSTL
  • Output frequency range: 161.1328125MHz – 168.8294492MHz
  • VCO range: 2.0GHz – 2.5GHz
  • Cycle-to-cycle jitter: 18ps (typical)
  • RMS phase jitter, 12kHz – 20MHz: 0.533ps (typical)
  • Full 3.3V or 2.5V operating supply
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
83PN161AKILFLast Time BuyNRG10VFQFPN10IYesTrayCheck Availability
83PN161AKILFTLast Time BuyNRG10VFQFPN10IYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
ICS83PN161I Datasheet Datasheet PDF 278 KB Jul 6, 2011
Errata# NEN-11-03 Errata PDF 62 KB Apr 15, 2011
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
show all (20)
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 8, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 6, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 6, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 5, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 15, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 15, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PDN# : CQ-16-02 Quarter PDN for Declined Market Product Discontinuation Notice PDF 592 KB Aug 25, 2016
PCN# : A1309-01 Changed of Traceability Mark Format Product Change Notice PDF 439 KB Oct 11, 2013
PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB Sep 11, 2013