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

tuneProduct Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Obsolete SOIC 8 C Yes Tube
Obsolete SOIC 8 C Yes Reel


Title language Type Format File Size Date
Datasheets & Errata
star 409 Datasheet Datasheet PDF 208 KB
PDN# : U-12-03R4 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 72 KB
PDN# : U-12-03R3 Product Discontinuation Notice PDF 72 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil Product Change Notice PDF 223 KB