Clocks & Timing

Overview

The 843204I is a 4 output LVPECL Synthesizer optimized to generate Gigabit Ethernet and SONET reference clock frequencies and is a member of the family of high performance clock solutions from IDT. Using a 19.44MHz and 25MHz, 18pF parallel resonant crystal, 155.52MHz and 156.25MHz frequencies can be generated. The 843204I uses IDT's FemtoClock™ low phase noise VCO technology and can achieve 1ps or lower typical RMS phase jitter. The 843204I is packaged in a 48-pin TSSOP package.

843204I - Block Diagram
843204I - Pinout
843204I - Block Diagram
843204I - Pinout
  • Four 3.3V LVPECL outputs
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input
  • Supports the following output frequencies: 155.52MHz and 156.25MHz
  • VCO range: 560MHz - 680MHz
  • RMS phase jitter @ 155.52MHz, using a 19.44MHz crystal (12kHz - 20MHz): 0.98ps (typical)
  • RMS phase jitter @ 156.25MHz, using a 19.44MHz crystal (1.875MHz - 20MHz): 0.52ps (typical)
  • Full 3.3V supply mode
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Documentation

Title Type Date
ICS843204I Data Sheet
PDF498 KB
Datasheet
AN-805 Recommended Ferrite Beads
PDF91 KB
Application Note
AN-827 Application Relevance of Clock Jitter
PDF1.99 MB
Application Note
AN-828 Termination - LVPECL
PDF322 KB
Application Note
AN-831 The Crystal Load curve
PDF395 KB
Application Note
AN-844 Termination - AC Coupling Clock Receivers
PDF170 KB
Application Note
AN-842 Thermal Considerations in Package Design and Selection
PDF495 KB
Application Note
AN-840 Jitter Specifications for Timing Signals
PDF442 KB
Application Note
AN-838 Peak-to-Peak Jitter Calculations
PDF115 KB
Application Note
AN-839 RMS Phase Jitter
PDF233 KB
Application Note
AN-832 Timing Budget and Accuracy
PDF131 KB
Application Note
AN-834 Hot-Swap Recommendations
PDF153 KB
Application Note
AN-835 Differential Input with VCMR being VIH Referenced
PDF160 KB
Application Note
AN-836 Differential Input to Accept Single-ended Levels
PDF120 KB
Application Note
AN-837 Overdriving the Crystal Interface
PDF133 KB
Application Note
AN-830 Quartz Crystal Drive Level
PDF143 KB
Application Note
AN-815 Understanding Jitter Units
PDF565 KB
Application Note
AN-802 Crystal-Measuring Oscillator Negative Resistance
PDF136 KB
Application Note
AN-801 Crystal-High Drive Level
PDF202 KB
Application Note
AN-806 Power Supply Noise Rejection
PDF438 KB
Application Note
AN-803 Crystal Timing Budget and Accuracy for Renesas Timing Clock Products
PDF108 KB
Application Note
PDN# : CQ-16-04 QUARTER MARKET DECLINED PDN
PDF560 KB
End Of Life Notice
IDT Clock Generation Overview
PDF1.83 MB
Overview
PCN# : A1808-01 Transfer Assembly Location from Amkor Philippines for select packages
PDF39 KB
Product Change Notice
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly
PDF611 KB
Product Change Notice
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly
PDF611 KB
Product Change Notice
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location
PDF596 KB
Product Change Notice
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location
PDF544 KB
Product Change Notice
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages
PDF95 KB
Product Change Notice
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages
PDF50 KB
Product Change Notice
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products
PDF361 KB
Product Change Notice

Design & Development

Software Downloads

Title Type Date
PDN# : CQ-16-04 QUARTER MARKET DECLINED PDN
PDF560 KB
End Of Life Notice

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models

Models

Title Type Date
843204I IBIS Model
ZIP12 KB
Model - IBIS

Product Options

    Processing table
    Part Number
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    843204AGILF
    block_flippedObsolete
    memory
    view_in_ar
    		TSSOP 48 I Yes Tube
    843204AGILFT
    block_flippedObsolete
    memory
    view_in_ar
    		TSSOP 48 I Yes Reel
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