The 345 field programmable clock synthesizer generates up to nine high-quality, high-frequency clock outputs including multiple reference clocks from a low-frequency crystal or clock input. It is designed to replace crystals and crystal oscillators in most electronic systems. Using IDT's VersaClockTM software to configure PLLs and outputs, the 345 contains a One-Time Programmable (OTP) ROM to allow field programmability. Programming features include eight selectable configuration registers, up to two sets of four low-skew outputs, and optional Spread Spectrum outputs. Using Phase-Locked Loop (PLL) techniques, the device runs from a standard fundamental mode, inexpensive crystal, or clock. It can replace multiple crystals and oscillators, saving board space and cost. The 345 is also available in factory programmed custom versions for high-volume applications.

Features

  • Packaged as 20-pin SSOP (QSOP) (Pb-free)
  • Spread spectrum capability
  • Eight addressable registers
  • Replaces multiple crystals and oscillators
  • Output frequencies up to 200 MHz at 3.3 V
  • Input crystal frequency of 5 to 27 MHz
  • Input clock frequency of 2 to 50 MHz
  • Up to nine reference outputs
  • Up to two sets of four low-skew outputs
  • Operating voltages of 3.3 V
  • Advanced, low-power CMOS process
  • For one output clock, use the ICS341. For two output clocks, see the ICS342. For three output clocks, see the ICS343. For more than three outputs, see the ICS345 or ICS348.

Product Options

下单器件 ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
345RPLF Active PCG20 QSOP 20 C Yes Tube
Availability
345RPLFT Active PCG20 QSOP 20 C Yes Reel
Availability

技术资料

文档标题 他の言語 文档类型 文档格式 文件大小
数据手册与勘误表
345 Datasheet Datasheet PDF 107 KB
使用指南与说明
VersaClock II User Guide Manual Manual - User Reference PDF 612 KB
应用指南 &白皮书
AN-828 Termination - LVPECL Application Note PDF 229 KB
AN-831 The Crystal Load curve Application Note PDF 308 KB
AN-845 Termination - LVCMOS Application Note PDF 62 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB
AN-839 RMS Phase Jitter Application Note PDF 149 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB
AN-815 Understanding Jitter Units Application Note PDF 476 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB
AN-801 Crystal-High Drive Level Application Note PDF 109 KB
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB
PCN / PDN
PCN# : A1808-01 Transfer Assembly Location from Amkor Philippines for select pacakges Product Change Notice PDF 39 KB
PDN# : CQ-18-03 Product Discontinuance Notice Product Discontinuation Notice PDF 218 KB
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB
其它
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB

软件与工具

文档标题 他の言語 文档类型 文档格式 文件大小
VersaClock II Desktop Software Setup Software ZIP 6.24 MB
345 3.3 V IBIS Model Model - IBIS ZIP 3 KB
345 3.3 V IBIS Model Model - IBIS ZIP 3 KB