Low Skew, 1-to-9 Differential-to-LVHSTL Fanout Buffer

NOTICE - The following device(s) are recommended alternatives:
The 8521I-03 is a low skew, 1-to-9 Differential-to-LVHSTL Fanout Buffer . The 8521I-03 has two selectable clock inputs. Redundant clock pairs, CLK0, nCLK0 and CLK1, nCLK1 can accept most standard differential input levels. The clock enable is internally synchronized to eliminate runt pulses on the outputs during asynchronous assertion/deassertion of the clock enable pin.
 
Guaranteed output skew and part-to-part skew characteristics make the 8521I-03 ideal for today’s most advanced applications, such as IA64 and static RAMs.

Features

  • 9 LVHSTL outputs
  • Redundant differential CLK0, nCLK0 and CLK1, nCLK1 inputs
  • CLKx, nCLKx pairs can accept the following differential input levels: LVPECL, LVDS, LVHSTL, SSTL, HCSL
  • Maximum output frequency: 500MHz
  • Output skew: 50ps (maximum)
  • Part-to-part skew: 250ps (maximum)
  • Propagation delay: 1.6ns (maximum)
  • VOH = 1V (maximum)
  • 3.3V core, 1.8V output operating supply voltages
  • -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
8521AYI-03LN Obsolete PRG32 TQFP 32 I Yes Tray Availability
8521AYI-03LNT Obsolete PRG32 TQFP 32 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
8521i-03 Datasheet Datasheet PDF 366 KB Jun 21, 2016
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 10, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 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-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 5, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 5, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
PCNs & PDNs
PDN# : CQ-16-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 552 KB May 3, 2016
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 13, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 14, 2016
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
Other
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
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
IDT Fanout Buffers Product Overview Product Brief PDF 739 KB Feb 16, 2015
High-Performance, Low-Phase Noise Clocks Buffers product brief Product Brief PDF 378 KB Aug 13, 2012

Software & Tools

Title Other Languages Type Format File Size Date
8521i-03 IBIS Model Model - IBIS ZIP 42 KB Nov 23, 2009

News & Additional Resources