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Multiplier and Zero Delay Buffer

The IDT570 is a high-performance Zero Delay Buffer (ZDB) which integrates IDT's proprietary analog/digital Phase Locked Loop (PLL) techniques. The A version is recommended for 5 V designs and the B version for 3.3 V designs. The chip is part of IDT's ClockBlocks™ family, and was designed as a performance upgrade to meet today's higher speed and lower voltage requirements. The zero delay feature means that the rising edge of the input clock aligns with the rising edges of both output clocks, giving the appearance of no delay through the device. There are two outputs on the chip, one being a low-skew divide by two of the other output. The device incorporates an all-chip power down/tri-state mode that stops the internal PLL and puts both outputs into a high impedance state. The IDT570 is ideal for synchronizing outputs in a large variety of systems, from personal computers to data communications to graphIDT/video. By allowing off-chip feedback paths, the device can eliminate the delay through other devices.


  • Packaged in 8-pin SOIC
  • Available in Pb (lead) free package
  • Pin-for-pin replacement and upgrade to IDT570M
  • Functional equivalent to AV9170 (not a pin-for-pin replacement).
  • Low input to output skew of 300 ps max (>60 MHz outputs)
  • Low skew (100ps) outputs. One is ÷ 2 of other
  • Ability to choose between 14 different multipliers from 0.5X to 32X
  • Output clock frequency up to 168 MHz at 3.3 V
  • Can recover degraded input clock duty cycle
  • Output clock duty cycle of 45/55
  • Power-down and Tri-State mode
  • Passes spread spectrum clock modulation
  • Full CMOS clock swings with 25 mA drive capability at TLL levels
  • Advanced, low power CMOS process
  • IDT570B has an operating voltage of 3.3 V
  • IDT570A has an operating voltage of 5.0V
  • Industrial temperature version available

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Inputs (#)Input TypeOutput Voltage (V)Output Skew (ps)
1, 2LVCMOS10.000000 - 170.000000, 26.000000 - 110.0000001LVCMOS3.3, 5175, 200, 300

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
570AILFActiveDCG8SOIC8IYesTubeCheck Availability
570AILFTActiveDCG8SOIC8IYesReelCheck Availability
570ALFActiveDCG8SOIC8CYesTubeCheck Availability
570ALFTActiveDCG8SOIC8CYesReelCheck Availability
570BILFActiveDCG8SOIC8IYesTubeCheck Availability
570BILFTActiveDCG8SOIC8IYesReelCheck Availability
570BLFActiveDCG8SOIC8CYesTubeCheck Availability
570BLFTActiveDCG8SOIC8CYesReelCheck Availability
570GI-01LFObsoleteDVG8TSSOP8IYesTubeCheck Availability
570GI-01LFTObsoleteDVG8TSSOP8IYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
570 Datasheet Datasheet PDF 256 KB Jun 3, 2008
Apps 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 13, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
show all (10)
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
System Applications and Design Guidelines with IDT’s Zero-Delay Buffers Application Note PDF 245 KB Sep 11, 2013
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 14, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 15, 2016
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 22, 2015
show all (13)
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 21, 2015
PCN# : A1403-03 Gold wire to Copper wire Product Change Notice PDF 42 KB Oct 15, 2014
PDN# : U-13-05R2 PRODUCT DISCONTINUANCE NOTICE (REVISED) Product Discontinuation Notice PDF 161 KB Oct 29, 2013
PCN# : A1309-01 Changed of Traceability Mark Format Product Change Notice PDF 439 KB Oct 11, 2013
PCN# : A1305-01 Gold Wire to Copper Wire Product Change Notice PDF 148 KB Jul 29, 2013
PDN# : U-13-05R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 161 KB Jul 25, 2013
PDN# : U-13-05 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 159 KB Apr 10, 2013
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB Dec 21, 2012
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil Product Change Notice PDF 223 KB Oct 6, 2006
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 25, 2016

Software & Tools

Title Type Format File Size Datesort icon
570 3.3V IBIS Model Model - IBIS ZIP 6 KB Aug 3, 2010
570 5V IBIS Model Model - IBIS ZIP 3 KB Mar 14, 2006