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8735BI-21

700MHz, Differential-to-3.3V LVPECL Zero Delay Clock Generator

The 8735BI-21 is a highly versatile 1:1 Differential-to-3.3V LVPECL clock generator. The CLK, nCLK pair can accept most standard differential input levels. The 8735BI-21 has a fully integrated PLL and can be configured as zero delay buffer, multiplier or divider, and has an output frequency range of 31.25MHz to 700MHz. The reference
divider, feedback divider and output divider are each programmable, thereby allowing for the following output-to-input frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8. The external feedback allows the device to achieve “zero delay” between the input clock and the output clocks. The PLL_SEL pin can be used to bypass the PLL for system
test and debug purposes. In bypass mode, the reference clock is routed around the PLL and into the internal output dividers.

Features

  • One differential 3.3V LVPECL output pair, one differential feedback output pair
  • Differential CLK, nCLK input pair
  • CLK, nCLK pair can accept the following differential input levels: LVDS, LVPECL, LVHSTLHCSL
  • Output frequency range: 31.25MHz to 700MHz
  • Input frequency range: 31.25MHz to 700MHz
  • VCO range: 250MHz to 700MHz
  • Programmable dividers allow for the following output-to-input frequency ratios: 8:1, 4:1, 2:1, 1:1, 1:2, 1:4, 1:8
  • External feedback for “zero delay” clock regeneration with configurable frequencies
  • Cycle-to-cycle jitter: 50ps (maximum)
  • 3.3V supply voltage
  • -40°C to 85°C ambient operating temperature
  • Available in RoHS compliant package

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
1LVPECL31.250000 - 700.00000031.250000 - 700.0000001SSTL, LVPECL, LVDS, HSTL, HCSL13.33.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8735BKI-21LFActiveNLG32P3VFQFPN32IYesTrayCheck Availability
8735BKI-21LFTActiveNLG32P3VFQFPN32IYesReelCheck Availability
8735BMI-21LFActivePSG20SOIC20IYesTubeCheck Availability
8735BMI-21LFTActivePSG20SOIC20IYesReelCheck Availability

Documents

Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
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8735BI-21 Datasheet Datasheet PDF 433 KB Feb 10, 2015
Apps Notes & White Papers
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AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
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AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
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AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
show all (11)
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AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
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AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
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AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
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AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
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AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 6, 2014
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AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
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AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
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AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PCNs & PDNs
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PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 14, 2016
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PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 15, 2016
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PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 28, 2016
show all (4)
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PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
Other
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IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
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IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016