Quad PLL Field Programmable VersaClock Synthesizer

The 348 field programmable clock synthesizer generates up to 9 high-quality, high-frequency clock outputs including multiple reference clocks from a low frequency crystal or clock input. The 348 has 4 independent on-chip PLLs and is designed to replace crystals and crystal oscillators in most electronic systems. Using IDT's VersaClockTM software to configure PLLs and outputs, the 348 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. 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 348 is also available in factory programmed custom versions for high-volume applications.

Features

  • Packaged as 20-pin SSOP (QSOP) (Pb-free)
  • Eight addressable registers
  • Replaces multiple crystals and oscillators
  • Output frequencies up to 200 MHz at 3.3V
  • 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 (8-pin). For two output clocks, use the ICS342 (8-pin). For three output clocks, use the ICS343 (8-pin). For more than three outputs, use the ICS345 or ICS348.

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
348RIPLF Last Time Buy PCG20 QSOP 20 I Yes Tube Availability
348RIPLFT Last Time Buy PCG20 QSOP 20 I Yes Reel Availability
348RPLF Last Time Buy PCG20 QSOP 20 C Yes Tube Availability
348RPLFT Last Time Buy 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 日期
数据手册与勘误表
348 Datasheet Datasheet PDF 103 KB Sep 8, 2013
348 Datasheet Datasheet PDF 213 KB May 13, 2010
348-22 Datasheet Datasheet PDF 203 KB Jun 2, 2008
使用指南与说明
VersaClock II User Guide Manual Manual - User Reference PDF 612 KB Feb 6, 2012
应用指南 &白皮书
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 10, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 12, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 7, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 6, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 6, 2014
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB May 5, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 5, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 5, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 4, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 11, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 14, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 14, 2014
PCN / PDN
PDN# : CQ-17-04 Product Discontinuance Notice Product Discontinuation Notice PDF 599 KB Aug 24, 2017
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 21, 2015
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 20, 2015
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 23, 2013
其它
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
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 24, 2016
软件与工具
VersaClock II Desktop Software Setup Software ZIP 6.24 MB Feb 6, 2012
348 3.3 V IBIS Model Model - IBIS ZIP 3 KB Mar 8, 2006
348 3.3 V IBIS Model Model - IBIS ZIP 3 KB Mar 8, 2006

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 日期
VersaClock II Desktop Software Setup Software ZIP 6.24 MB Feb 6, 2012
348 3.3 V IBIS Model Model - IBIS ZIP 3 KB Mar 8, 2006
348 3.3 V IBIS Model Model - IBIS ZIP 3 KB Mar 8, 2006