NOTICE - The following device(s) are recommended alternatives:
The 8442I-90 is a general purpose, dual output Crystal-to-Differential LVDS High Frequency Synthesizer. The 8442I-90 has a selectable REF_CLK or crystal input. The REF_CLK input accepts LVCMOS or LVTTL input levels and translates them to LVDS levels. The VCO operates at a frequency range of 250MHz to 700MHz. The VCO frequency is programmed in steps equal to the value of the input reference or crystal frequency. The VCO and output frequency can be programmed using the serial or parallel interface to the configuration logic.

Features

  • Dual differential LVDS outputs FOUT1/nFOUT1 lags FOUT0/nFOUT0 by 90°
  • Selectable crystal oscillator interface or LVCMOS/LVTTL REF_CLK
  • Output frequency range: 31.25MHz - 700MHz
  • Crystal input frequency range: 10MHz to 25MHz
  • VCO range: 250MHz - 700MHz
  • Parallel or serial interface for programming counter and output dividers
  • RMS period jitter: 7ps (maximum), (N= ÷1, ÷2, ÷4)
  • Cycle-to-cycle jitter: 34ps (maximum), (N= ÷1, ÷2)
  • 3.3V supply voltage
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
8442AKI-90LF Obsolete NLG32P1 VFQFPN 32 I Yes Tray
Availability
8442AKI-90LFT Obsolete NLG32P1 VFQFPN 32 I Yes Reel
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
8442I-90 Final Datasheet Datasheet PDF 190 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB
AN-831 The Crystal Load curve Application Note PDF 308 KB
AN-846 Termination - LVDS Application Note PDF 50 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB
AN-839 RMS Phase Jitter Application Note PDF 149 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB
AN-815 Understanding Jitter Units Application Note PDF 476 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB
AN-801 Crystal-High Drive Level Application Note PDF 109 KB
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB
PCNs & PDNs
PDN# : CQ-14-02R2 Product Discontinuation Notice PDF 549 KB
PDN# : CQ-14-02R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 545 KB
PDN# : CQ-14-02 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 544 KB