The 8432I-51 is a general purpose, dual output Crystal-to-3.3V Differential LVPECL High Frequency Synthesizer. The 8432I-51 has a selectable REF_CLK or crystal input. The VCO operates at a frequency range of 250MHz to 700MHz. The VCO frequency is programmed in steps equal to the value of the input reference or crystal frequency. The VCO and output frequency can be programmed using the serial or parallel interface to the configuration logic. The low phase noise characteristics of the 8432I-51 make it an ideal clock source for Gigabit Ethernet, Fibre Channel 1 and 2, and Infiniband applications.

Features

  • Dual differential 3.3V LVPECL outputs
  • Selectable crystal oscillator interface or LVCMOS/LVTTL REF_CLK
  • Output frequency range: 31.25MHz to 700MHz
  • Crystal input frequency range: 12MHz to 25MHz
  • VCO range: 250MHz to 700MHz
  • Parallel or serial interface for programming counter and output dividers
  • RMS period jitter: 3.5ps (maximum)
  • Cycle-to-cycle jitter: 40ps (maximum)
  • 3.3V supply voltage
  • -40°C to 85°C ambient operating temperature
  • Available in  lead-free (RoHS 6) package

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
8432CKI-51LF
Package Info
PCB Symbol, Footprint, and 3D Model
Obsolete VFQFPN 32 I Yes Tray
Availability
Buy / Quote
8432CKI-51LFT
Package Info
PCB Symbol, Footprint, and 3D Model
Obsolete VFQFPN 32 I Yes Reel
Availability
Buy / Quote
8432CYI-51LF
Package Info
PCB Symbol, Footprint, and 3D Model
Obsolete TQFP 32 I Yes Tray
Availability
Buy / Quote
8432CYI-51LFT
Package Info
PCB Symbol, Footprint, and 3D Model
Obsolete TQFP 32 I Yes Reel
Availability
Buy / Quote

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
ICS8432I-51 Datasheet – Datasheet PDF 431 KB
Application Notes & White Papers
AN-828 Termination - LVPECL – Application Note PDF 322 KB
AN-831 The Crystal Load curve – Application Note PDF 395 KB
AN-842 Thermal Considerations in Package Design and Selection – Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals – Application Note PDF 442 KB
AN-838 Peak-to-Peak Jitter Calculations – Application Note PDF 115 KB
AN-839 RMS Phase Jitter – Application Note PDF 233 KB
AN-832 Timing Budget and Accuracy – Application Note PDF 131 KB
AN-834 Hot-Swap Recommendations – Application Note PDF 153 KB
AN-837 Overdriving the Crystal Interface – Application Note PDF 133 KB
AN-830 Quartz Crystal Drive Level – Application Note PDF 143 KB
AN-827 Application Relevance of Clock Jitter – Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units – Application Note PDF 565 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance – Application Note PDF 136 KB
AN-801 Crystal-High Drive Level – Application Note PDF 202 KB
AN-806 Power Supply Noise Rejection – Application Note PDF 438 KB
AN-805 Recommended Ferrite Beads – Application Note PDF 121 KB
AN-803 Crystal Timing Budget and Accuracy for Renesas Timing Clock Products – Application Note PDF 108 KB
PCNs & PDNs
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility – Product Change Notice PDF 983 KB
PDN# : CQ-19-01(R1) Quarterly Market Declined PDN – Product Discontinuation Notice PDF 1014 KB
PDN# : CQ-19-01 Quarterly Market Declined PDN – Product Discontinuation Notice PDF 537 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location – Product Change Notice PDF 583 KB
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly – Product Change Notice PDF 611 KB
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly – Product Change Notice PDF 611 KB
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location – Product Change Notice PDF 596 KB
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location – Product Change Notice PDF 544 KB
PCN# : A1401-02 Alternate Copper Wire Assembly Site – Product Change Notice PDF 36 KB
PCN#: A1309-03 Additional Assembly Sources – Product Change Notice PDF 398 KB
PCN# : A1309-01 Changed of Traceability Mark Format – Product Change Notice PDF 439 KB
PDN# : N-12-22R2 PRODUCT DISCONTINUANCE NOTICE – Product Discontinuation Notice PDF 363 KB
PCN# : TB1303-01 Change of Carrier Tape for TQFP-32, TQFP-48 – Product Change Notice PDF 472 KB
PDN# : N-12-22R1 PRODUCT DISCONTINUANCE NOTICE – Product Discontinuation Notice PDF 209 KB
Downloads
8432I-51 IBIS Model – Model - IBIS ZIP 27 KB
Other
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
info: For device-specific or order-specific documentation, submit a support request.

News & Additional Resources

Type Date
An Insider’s Guide to Finding the Right Timing Device for Your System Blog Post Dec 18, 2017
Why Fanout Buffers Make More Sense Blog Post Nov 28, 2017