The 8T73S208 is a high-performance differential LVPECL clock divider and fanout buffer. The device is designed for the frequency division and signal fanout of high-frequency, low phase-noise clocks. The 8T73S208 is characterized to operate from a 2.5V and 3.3V power supply. Guaranteed output-to-output and part-to-part skew characteristics make the 8T73S208 ideal for those clock distribution applications demanding well-defined performance and repeatability. The integrated input termination resistors make interfacing to the reference source easy and reduce passive component count. Each output can be individually enabled or disabled in the high-impedance state controlled by a I2C register. On power-up, all outputs are enabled. 

Features

  • One differential input reference clock
  • Differential pair can accept the following differential input levels: LVDS, LVPECL, CML
  • Integrated input termination resistors
  • Eight LVPECL outputs
  • Selectable clock frequency division of ÷1, ÷2, ÷4 and ÷8
  • Maximum input clock frequency: 1000MHz
  • LVCMOS interface levels for the control inputs
  • Individual output enable/disabled by I2C interface
  • Output skew: <60ps
  • Output rise/fall times: 350ps (maximum)
  • Low additive phase jitter, RMS: 0.182ps (typical)
  • Full 2.5V and 3.3V supply voltages
  • Available in Lead-free (RoHS 6) 32-Lead VFQFN package
  • -40°C to 85°C ambient operating temperature

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
8T73S208BNLGI Active NLG32P1 VFQFPN 32 I Yes Tray
Availability
8T73S208BNLGI8 Active NLG32P1 VFQFPN 32 I Yes Reel
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
Errata# : NEN-16-01 Datasheet Errata for 8T73S208BNLGI, 8T73S208BNLGI8 Datasheet Errata PDF 64 KB
8T73S208 Datasheet Datasheet PDF 730 KB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 120 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 160 KB
AN-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 180 KB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PCNs & PDNs
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB
PCN# : A1403-03 Gold wire to Copper wire Product Change Notice PDF 42 KB
Downloads
8T73S208I IBIS Model Model - IBIS ZIP 86 KB
Other
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB

Boards & Kits