Crystal-to-0.7V Differential HCSL/LVCMOS Frequency Synthesizer

The 841S012DI is an optimized PCIe, sRIO and Gigabit Ethernet Frequency Synthesizer and a member of family of high performance clock solutions from IDT. The 841S012DI uses a 25MHz parallel resonant crystal to generate 33.33MHz - 200MHz clock signals, replacing multiple oscillators and fanout buffer solutions. The device supports ±0.25% center-spread, and -0.5% down-spread clocking with two spread select pins (SSC[1:0]). The VCO operates at a frequency of 2GHz. The device has three output banks: Bank A with two 100MHz – 250MHz HCSL outputs; Bank B with seven 33.33MHz – 200MHz LVCMOS/ LVTTL outputs; and Bank C with one 33.33MHz – 200MHz LVCMOS/LVTTL output.

All Banks A, B and C have their own dedicated frequency select pins and can be independently set for the frequencies mentioned above. The low jitter characteristic of the 841S012DI makes it an ideal clock source for PCIe, sRIO and Gigabit Ethernet applications. Designed for networking and industrial applications, the 841S012DI can also drive the high-speed clock inputs of communication processors, DSPs, switches and bridges.

Features

  • Two 0.7V differential HCSL outputs (Bank A), configurable for PCIe (100MHz or 250MHz) and sRIO (100MHz or 125MHz) clock signals Eight LVCMOS/LVTTL outputs (Banks B/C), 18? typical output impedance Two REF_OUT LVCMOS/LVTTL clock outputs, 23? typical output impedance
  • Selectable crystal oscillator interface, 25MHz, 18pF parallel resonant crystal or one LVCMOS/LVTTL single-ended reference clock input
  • Supports the following output frequencies: HCSL Bank A: 100MHz, 125MHz, 200MHz and 250MHz LVCMOS/LVTTL Bank B/C: 33.33MHz, 50MHz, 66.67MHz, 100MHz, 125MHz, 133.33MHz, 166.67MHz and 200MHz
  • VCO: 2GHz
  • Spread spectrum clock: ±0.25% center-spread (typical) and -0.6% down-spread (typical)
  • PLL bypass and output enable
  • RMS period jitter: 10ps (typical), QAx/nQAx outputs
  • Full 3.3V supply mode
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
841S012DKILF Active NLG56P3 VFQFPN 56 I Yes Tray Availability
841S012DKILFT Active NLG56P3 VFQFPN 56 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS841S012DI Datasheet Datasheet PDF 279 KB Jan 3, 2016
Application Notes & White Papers
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
Netcom LVCMOS Power Dissipation Application Note PDF 310 KB Mar 15, 2006
Netcom LVCMOS Driver Termination Application Note PDF 147 KB Mar 15, 2006
PCNs & PDNs
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
Other
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
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 Products for Radio Applications 日本語 Product Brief PDF 2.34 MB Nov 29, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016

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