The 542 is cost effective way to produce a high-quality clock output divided from a clock input. The chip accepts a clock input up to 156 MHz at 3.3 V and produces a divide by 2, 4, 6, 8, 12, or 16 of the input clock. There are two outputs on the chip, one being a low-skew divide by two of the other. For instance, if an 100 MHz input clock is used, the 542 can produce low-skew 50 MHz and 25 MHz clocks, or low skew 25 MHz and 12.5 MHz clocks. The chip has an all-chip power-down mode that stops the outputs low, and an OE pin that tri-states the outputs. See the 501, 502, 511, 512, and 525 for clock multipliers.


  • 8-pin SOIC package, Pb free
  • Available in RoHS compliant package
  • IDT's lowest cost clock divider
  • Low skew (500 ps) outputs. One is /2 of the other
  • Easy to use with other generators and buffers
  • Input clock frequency up to 156 MHz
  • Output clock duty cycle of 45/55
  • Power-down turns off chip
  • Output Enable
  • Advanced, low-power CMOS process
  • Operating voltage of 3.3 V or 5 V
  • Does not degrade phase noise - no PLL
  • Available in industrial and commercial temperature ranges


器件号 Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active SOIC 8 I 是的 Tube
Active SOIC 8 I 是的 Reel
Active SOIC 8 C 是的 Tube
Active SOIC 8 C 是的 Reel


文档标题 language 类型 文档格式 文件大小 日期
542 Datasheet 数据手册 PDF 224 KB
应用指南 &白皮书
AN-828 Termination - LVPECL 应用文档 PDF 322 KB
AN-845 Termination - LVCMOS 应用文档 PDF 146 KB
AN-844 Termination - AC Coupling Clock Receivers 应用文档 PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection 应用文档 PDF 495 KB
AN-840 Jitter Specifications for Timing Signals 应用文档 PDF 442 KB
AN-834 Hot-Swap Recommendations 应用文档 PDF 153 KB
AN-827 Application Relevance of Clock Jitter 应用文档 PDF 1.15 MB
AN-815 Understanding Jitter Units 应用文档 PDF 565 KB
AN-805 Recommended Ferrite Beads 应用文档 PDF 121 KB
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly 产品变更通告 PDF 611 KB
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly 产品变更通告 PDF 611 KB
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages 产品变更通告 PDF 95 KB
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages 产品变更通告 PDF 50 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products 产品变更通告 PDF 361 KB
PCN# : A1208-01R1 Gold to Copper Wire 产品变更通告 PDF 254 KB
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil 产品变更通告 PDF 223 KB
542 3.3V IBIS Model 模型 - IBIS ZIP 3 KB
Clock Distribution Overview 日本語 概览 PDF 217 KB
IDT Clock Generation Overview 日本語 概览 PDF 1.83 MB