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841202-245 - Block Diagram
841202-245 - Pinout


Crystal-to-HCSL Clock Synthesizer W/Spread Spectrum

Alternative Products
NOTICE - The following device(s) are recommended alternatives:

The 841202-245 is a two output clock synthesizer optimized to generate low jitter with or without spread spectrum modulation. Spread type and amount can be configured via the SSC control pins. Using a 25MHz, 18pF parallel resonant crystal, the device will generate HCSL clocks at either 25MHz, 100MHz, 125MHz or 250MHz. The 841202-245 uses a low jitter VCO and is packaged in a 32-pin VFQFN package.


  • Two differential HCSL output pairs at: 100MHz, 125MHz or 250MHz
  • HCSL outputs can be terminated to drive LVDS loads up to 175MHz
  • 25MHz crystal interface
  • Supports the following output frequencies: 25MHz, 100MHz, 125MHz or 250MHz
  • VCO range: 250MHz - 700MHz
  • Supports SSC downspread at 0.05% and -0.75%, centerspread at ±0.25% and no spread options
  • Cycle-to-cycle jitter: 15ps (typical)
  • Period jitter, RMS: 2.5ps (typical)
  • Full 3.3V operating supply mode
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) packages

Product Specification

Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
HCSL25.000000, 100.000000, 125.000000, 250.00000025.0000001Crystal13.33.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
841202BK-245LFLast Time BuyNLG32P3VFQFPN32CYesTrayCheck Availability
841202BK-245LFTLast Time BuyNLG32P3VFQFPN32CYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
ICS841202-245 Datasheet Datasheet PDF 325 KB May 20, 2016
PDN# : CQ-16-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 552 KB May 4, 2016
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 28, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
IDT PCI Express Solutions Overview 简体中文, 日本語 Overview PDF 945 KB Aug 4, 2016
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016