The 810001I-21 is a PLL based synchronous clock generator that is optimized for digital video clock jitter attenuation and frequency translation. The device contains two internal frequency multiplication stages that are cascaded in series. The first stage is a VCXO PLL that is optimized to provide reference clock jitter attenuation, and to support the complex PLL multiplication ratios needed for video rate conversion. The second stage is a FemtoClock® frequency multiplier that provides the low jitter, high frequency video output clock.
Preset multiplication ratios are selected from internal lookup tables using device input selection pins. The multiplication ratios are  optimized to support most common video rates used in professional video system applications. The VCXO requires the use of an external, inexpensive pullable crystal. Two crystal connections are provided (pin selectable) so that both 60 and 59.94 base frame rates can be supported. The VCXO requires external passive loop filter components which are used to set the PLL loop bandwidth and damping characteristics.


  • Jitter attenuation and frequency translation of video clock signals
  • Supports SMPTE 292M, ITU-R Rec. 601/656 and MPEG-transport clocks
  • Support of High-Definition (HD) and Standard-Definition (SD) pixel rates
  • Dual VCXO-PLL supports both 60 and 59.94Hz base frame rates in one device
  • Supports both 1000/1001 and 1001/1000 rate conversions
  • Dual PLL mode for high-frequency clock generation (36MHz to 148.5MHz)
  • VCXO-PLL mode for low-frequency clock generation (27MHz and 26.973MHz)
  • One LVCMOS/LVTTL clock output
  • Two selectable LVCMOS/LVTTL clock inputs
  • LVCMOS/LVTTL compatible control signals
  • RMS phase jitter @148.3516MHz, (12kHz - 20MHz): 1.089ps (typical)
  • 3.3V supply voltage
  • -40°C to 85°C ambient operating temperature
  • Lead-free (RoHS 6) packaging

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
810001DKI-21LF Obsolete NLG32P1 VFQFPN 32 I Yes Tray
810001DKI-21LFT Obsolete NLG32P1 VFQFPN 32 I Yes Reel

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS810001I-21 Datasheet Datasheet PDF 214 KB
Application Notes & White Papers
AN-841 Pullable Crystal Selection and VCXO Tuning Application Note PDF 248 KB
AN-849 Loop Filter Component Selection for VCXO Based PLLs Application Note PDF 132 KB
AN-848 VCXO - Crystal Selection Application Note PDF 138 KB
AN-847 VCXO - Absolute Pull Range Application Note PDF 70 KB
Crystal Timing Budget and Accuracy for FemtoClocks Application Note PDF 904 KB
PDN# : CQ-16-04 QUARTER MARKET DECLINED PDN Product Discontinuation Notice PDF 560 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
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB