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8V44S269 Block Diagram
8V44S269 Pin Assignment

8V44S269

FemtoClock® Crystal-to-LVDS, LVCMOS 10-Output Clock Synthesizer

The 8V44S269 is a ten LVDS/LVTTL output clock synthesizer designed for instrumentation and wireless applications. The device generates four copies of a 125MHz, two copies of a 100MHz differential LVDS clock and one 50MHz (LVCMOS) signal with excellent phase jitter performance. The PLL is optimized for a reference frequency of 25MHz. Both a crystal interface and a single-ended input are supported for the reference frequency. Three LVCMOS outputs duplicate the reference frequency and are provided for clock tree cascade purpose. Each of the four LVCMOS outputs can be supplied with either 3.3V, 2.5V or 1.8V, forming the respective LVCMOS output levels of 3.3V, 2.5V or 1.8V. The device uses IDT’s third generation FemtoClock® technology for an optimum of high clock frequency and low phase noise performance, combined with a low power consumption. The device supports a 3.3V voltage supply and is packaged in a small, lead-free (RoHS 6) 48-lead VFQFN package.

Features

  • Third generation FemtoClock® technology
  • 125MHz, 100MHz and 50MHz output clocks synthesized from a 25MHz reference clock or fundamental mode crystal
  • Six differential LVDS clock outputs
  • QA[0:3] outputs (125MHz) are LVDS compatible
  • QB[0:1] outputs (100MHz) are LVDS compatible
  • Four single-ended LVCMOS-compatible reference clock outputs
  • QC output (50MHz) is LVCMOS 3.3V, 2.5V or 1.8V compatible
  • QREF[0:2] (25MHz) are LVCMOS 3.3V, 2.5V or 1.8V compatible
  • Crystal interface designed for 25MHz XTAL
  • RMS phase jitter @ 125MHz, using a 25MHz crystal
    (12kHz - 20MHz): 0.57 (typical)
  • RMS phase jitter @ 100MHz, using a 25MHz crystal
    (12kHz - 20MHz): 0.58 (typical)
  • LVCMOS interface levels for the control input
  • I/O supply voltages for LVDS:
    Core/Output
    3.3V/2.5V
  • I/O supply voltages for LVCMOS:
    Core/Output
    3.3V/3.3V
    3.3V/2.5V
    3.3V/1.8V
  • Lead-free (RoHS 6) 48-lead VFQFN packaging
  • -55°C to 105°C ambient operating temperature

Product Specification

Inputs (#)Input TypeInput Freq (MHz)Outputs (#)Output TypeOutput Voltage (V)Output Freq Range (MHz)
2Crystal, LVCMOS25.00000010LVCMOS, LVDS1.8, 2.5, 3.315.000000, 50.000000, 100.000000, 125.000000

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8V44S269NLGIActiveNLG48P1VFQFPN48IYesTrayCheck Availability
8V44S269NLGI8ActiveNLG48P1VFQFPN48IYesReelCheck Availability

Documents

Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
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8V44S269 Data Sheet Datasheet PDF 592 KB May 9, 2016
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-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
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AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
show all (18)
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AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
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AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 8, 2014
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AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
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AN-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
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AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
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AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB May 6, 2014
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AN-832 Timing Budget and Accuracy Application Note PDF 48 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-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 5, 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-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
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AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
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AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 15, 2014
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AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 15, 2014
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AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014