Low Skew,÷1,÷2 LVCMOS/LVTTL Clock Generator W/Polarlity Control

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

The 8701-01 is a low skew, ÷1, ÷2 LVCMOS/ LVTTL Clock Generator. The low impedance LVCMOS outputs are designed to drive 50? series or parallel terminated transmission lines. The effective fanout can be increased from 20 to 40 by utilizing the ability of the outputs to drive two series terminated lines. The divide select inputs, DIV_SELx, control the output frequency of each bank. The outputs can be utilized in the ÷1, ÷2 or a combination of ÷1 and ÷2 modes. The master reset/output enable input, nMR/OE, resets the internal dividers and controls the active and high impedance states of all outputs. The output polarity inputs, INV0:1, control the polarity (inverting or non-inverting) of the outputs of each bank. Outputs QA0:QA4 are inverting for every combination of the INV0:1 input. The timing relationship between the inverting and non-inverting outputs at different frequencies is shown in the Timing Diagrams. The 8701-01 is characterized at 3.3V and mixed 3.3V input supply, and 2.5V output supply operating modes. Guaranteed bank, output and part-to-part skew characteristics make the 8701-01 ideal for those clock distribution applications demanding well defined performance and repeatability.


  • Twenty LVCMOS/LVTTL outputs, 7? typical output impedance
  • One LVCMOS/LVTTL clock input
  • Maximum output frequency: 250MHz
  • Selectable inverting and non-inverting outputs
  • Bank enable logic allows unused banks to be disabled in reduced fanout applications
  • Output skew: 300ps (maximum)
  • Part-to-part skew: 700ps (maximum)
  • Bank skew: 250ps (maximum)
  • Multiple frequency skew: 350ps (maximum)
  • 3.3V or mixed 3.3V input, 2.5V output operating supply
  • 0°C to 70°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
8701AY-01LF Obsolete PRG48 TQFP 48 C Yes Tray Availability
8701AY-01LFT Obsolete PRG48 TQFP 48 C Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 12, 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-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
PDN# : CQ-14-03 Quarter PDN for Declined Market Product Discontinuation Notice PDF 539 KB Apr 24, 2014
PCN# : TB1303-01 Change of Carrier Tape for TQFP-32, TQFP-48 Product Change Notice PDF 472 KB Mar 30, 2013
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016

Software & Tools

Title Other Languages Type Format File Size Date
8701-01 IBIS Model - IBIS ZIP 48 KB Nov 23, 2009