Clocks & Timing

Overview

The 844071 is a Serial ATA (SATA)/Serial Attached SCSI (SAS) Clock Generator and a member of the family of high performance devices from IDT. The 844071 uses an 18pF parallel resonant crystal over the range of 20.833MHz - 28.3MHz. For SATA/SAS applications, a 25MHz crystal is used and either 75MHz or 150MHz may be selected with the FREQ_SEL pin. The 844071 has excellent <1ps phase jitter performance, over the 900kHz - 7.5MHz integration range. The 844071 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.

844071 - Block Diagram
844071 - Pinout
844071 - Block Diagram
844071 - Pinout
  • One differential LVDS output
  • Crystal oscillator interface, 18pF parallel resonant crystal (20.833MHz – 28.3MHz)
  • Output frequency range: 62.5MHz – 170MHz
  • VCO range: 500MHz – 680MHz
  • RMS phase jitter at 150MHz, using a 25MHz crystal (900kHz – 7.5MHz): 0.45ps (typical)
  • Full 3.3V or 2.5V operating supply
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Documentation

Title Type Date
844071 Datasheet
PDF327 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-846 Termination - LVDS
PDF133 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-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-19-01(R1) Quarterly Market Declined PDN
PDF1014 KB
End Of Life Notice
PDN# : CQ-19-01 Quarterly Market Declined PDN
PDF537 KB
End Of Life Notice
IDT Clock Generation Overview
PDF1.83 MB
Overview
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# : A1309-01 Changed of Traceability Mark Format
PDF439 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-19-01(R1) Quarterly Market Declined PDN
PDF1014 KB
End Of Life Notice
PDN# : CQ-19-01 Quarterly Market Declined PDN
PDF537 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
844071 IBIS Model
ZIP61 KB
Model - IBIS

Product Options

    Processing table
    Part Number
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    844071AGLF
    block_flippedObsolete
    memory
    view_in_ar
    		TSSOP 8 C Yes Tube
    844071AGLFT
    block_flippedObsolete
    memory
    view_in_ar
    		TSSOP 8 C Yes Reel
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