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PC Peripheral Clock

The IDT409 is a cost-effective clock synthesizer developed to optimize component count for PC peripheral applications. The device supports a common, low cost 14.31818 MHz crystal using an on-chip crystal oscillator. The device locks all output frequencies to enhance system performance. By supporting common PC peripheral interface frequencies including dual 25 MHz and 40/80 MHz frequencies the clock lowers chip count enhancing system cost and reliability. The IDT409 utilizes a low pin count 8-pin SOIC package to optimize board space. IDT provides a wide-range of low-jitter and power consumer application clock sources. These devices are capable of supporting CCD, video, audio, USB, CPU, and other peripherals.


  • Pin compatible with FS6286-01
  • Low operating voltage of 3.3 V
  • On-chip oscillator supports 14.31818 MHz crystal
  • Fixed dual 25 MHz clocks for Ethernet
  • 40/80 MHz selected on rising edge of OE/LAT pin
  • Power consumption of 15 mA (typ)
  • Duty cycle of 45 to 55 percent
  • Packaged in 8-pin SOIC
  • Available in Pb (lead) free package

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Inputs (#)Input TypeInput Freq (MHz)Output Voltage (V)Output Banks (#)Phase Jitter Typ RMS (ps)

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
409MLFObsoleteDCG8SOIC8CYesTubeCheck Availability
409MLFTObsoleteDCG8SOIC8CYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
409 Datasheet Datasheet PDF 159 KB May 14, 2010
PDN# : U-12-03R4 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 72 KB Jun 20, 2013
PDN# : U-12-03R3 Product Discontinuation Notice PDF 72 KB Mar 31, 2013
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013
show all (4)
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil Product Change Notice PDF 223 KB Oct 6, 2006