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CDCU877 Status: ACTIVE

1.8V Phase-Lock Loop Clock Driver for DDR2 SDRAM Applications

      
         
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Datasheet

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 CDCU877
VCC(V)1.8  
Operating Frequency Range(Min)(MHz)10  
Operating Frequency Range(Max)(MHz)400  
Absolute Jitter (cycle-to-cycle)(ps)30  
t(phase error)(Min)(ps)-50  
t(phase error)(Max)(ps)50  
Input LevelSSTL-18  
No. of Outputs10  
Output Drive(mA)9  
tsk(o)(ns)0.035  
Output LevelSSTL-18  
Pin/Package40QFN, 52BGA MICROSTAR JUNIOR  
Static Current(mA)0.5  
Approx. Price (US$) 2.80 | 1ku  
Operating Temp Range(Celsius)-40 to 85  
 Samples
 Inventory

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    • Product Information

    Features

    • 1.8-V Phase Lock Loop Clock Driver for Double Data Rate (DDR II) Applications
    • Spread Spectrum Clock Compatible
    • Operating Frequency: 10 MHz to 400 MHz
    • Low Current Consumption: <135 mA
    • Low Jitter (Cycle-Cycle): ±30 ps
    • Low Output Skew: 35 ps
    • Low Period Jitter: ±20 ps
    • Low Dynamic Phase Offset: ±15 ps
    • Low Static Phase Offset: ±50 ps
    • Distributes One Differential Clock Input toTen Differential Outputs
    • 52-Ball µBGA (MicroStar™ Junior BGA, 0,65-mm pitch) and 40-Pin MLF
    • External Feedback Pins (FBIN, FBIN) are Used to Synchronize the Outputs to the Input Clocks
    • Meets or Exceeds JESD82-8 PLL Standard for PC2-3200/4300
    • Fail-Safe Inputs

    MicroStar is a trademark of Texas Instruments.

    Description

    The CDCU877 is a high-performance, low-jitter, low-skew, zero-delay buffer that distributes a differential clock inputpair (CK, CK) to ten differential pairs of clock outputs (Yn, Yn) and to one differential pair of feedback clock outputs (FBOUT, FBOUT). The clock outputs are controlled by the input clocks (CK, CK), the feedback clocks (FBIN, FBIN), the LVCMOS control pins (OE, OS), and the analog power input (AVDD). When OE is low, the clock outputs, except FBOUT/FBOUT, are disabled while the internal PLL continues to maintain its locked-in frequency. OS (output select) is a program pin that must be tied to GND or VDD. When OS is high, OE functions as previously described. When OS and OE are both low, OE has no affect on Y7/Y7, they are free running. When AVDD is grounded, the PLL is turned off and bypassed for test purposes.

    When both clock inputs (CK, CK) are logic low, the device enters in a low power mode. An input logic detection circuit on the differential inputs, independent from input buffers, detects the logic low level and performs in a low power state where all outputs, the feedback, and the PLL are off. When the clock inputs transition from being logic low to being differential signals, the PLL turns back on, the inputs and the outputs are enabled, and the PLL obtains phase lock between the feedback clock pair (FBIN, FBIN) and the clock input pair (CK, CK) within the specified stabilization time.

    The CDCU877 is able to track spread spectrum clocking (SSC) for reduced EMI. This device operates from -40°C to 85°C.

    		    

    Pricing / Packaging / CAD Design Tools / Samples

    PricePackagingCAD Design ToolsSamples
    DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
    CDCU877GQLRACTIVE-40 to 852.80 | 1kuBGA MICROSTAR JUNIOR (GQL) | 52 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
    CDCU877GQLTACTIVE-40 to 853.05 | 1kuBGA MICROSTAR JUNIOR (GQL) | 52 View 250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
    CDCU877RHARACTIVE-40 to 852.80 | 1kuQFN (RHA) | 40 View 2500 | LARGE T&R Download CAD Format for this Symbol Purchase Samples
    CDCU877RHARG4ACTIVE-40 to 852.80 | 1kuQFN (RHA) | 40 View 2500 | LARGE T&R Download CAD Format for this Symbol Purchase Samples
    CDCU877RHATACTIVE-40 to 853.05 | 1kuQFN (RHA) | 40 View 250 | SMALL T&R Download CAD Format for this Symbol 
    CDCU877RHATG4ACTIVE-40 to 853.05 | 1kuQFN (RHA) | 40 View 250 | SMALL T&R Download CAD Format for this Symbol 
    CDCU877RTBRACTIVE-40 to 852.80 | 1kuQFN (RHA) | 40 View 2500 | LARGE T&R Download CAD Format for this Symbol 
    CDCU877RTBTACTIVE-40 to 853.05 | 1kuQFN (RTB) | 40 View 250 | SMALL T&R Download CAD Format for this Symbol 
    CDCU877ZQLRACTIVE-40 to 852.80 | 1kuBGA MICROSTAR JUNIOR (ZQL) | 52 View 1000 | LARGE T&R Download CAD Format for this Symbol 
    CDCU877ZQLTACTIVE-40 to 853.05 | 1kuBGA MICROSTAR JUNIOR (ZQL) | 52 View 250 | SMALL T&R Download CAD Format for this Symbol 

    * Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

    Inventory

      TI Inventory Status Reported Distributor Inventory
    CDCU877GQLRAs of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     4 Weeks AmericasDigiKey  Available
     Rochester Electronics >1k
    CDCU877GQLTAs of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     8 Weeks AmericasDigiKey 783
     AsiaWPI 200
    CDCU877RHARAs of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     4 Weeks AmericasDigiKey  Available
    CDCU877RHARG4As of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     4 Weeks AmericasDigiKey  Available
    CDCU877RHATAs of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     1 Week AmericasDigiKey 226
     AsiaWPI 200
     EuropeAvnet-SILICA 240
    CDCU877RHATG4As of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     1 Week AmericasDigiKey  Available
    CDCU877RTBRAs of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     4 Weeks AmericasDigiKey  Available
    CDCU877RTBTAs of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     1 Week AmericasDigiKey 263
     AsiaWPI 143
    CDCU877ZQLRAs of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     4 Weeks AmericasDigiKey  Available
     Rochester Electronics >1k
    CDCU877ZQLTAs of 11:39 AM GMT, 03 Jul 2009As of 11:39 AM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     1 Week AmericasDigiKey 233
     Rochester Electronics >1k
     AsiaWPI 200
    View all Distributors  

    ** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

    Quality & Lead (Pb)-Free Data

     Product ContentDPPM / MTBF / FIT Rate
    DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
    CDCU877GQLR  TBD SNPB Level-2-235C-1 YEARViewView
    CDCU877GQLT  TBD SNPB Level-2-235C-1 YEARViewView
    CDCU877RHAR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
    CDCU877RHARG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
    CDCU877RHAT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
    CDCU877RHATG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
    CDCU877RTBR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
    CDCU877RTBT  TBD CU SNPB Level-3-235C-168 HRViewView
    CDCU877ZQLR RoHS Compliant Green (RoHS & no Sb/Br) SNAGCU Level-2-260C-1 YEARViewView
    CDCU877ZQLT RoHS Compliant Green (RoHS & no Sb/Br) SNAGCU Level-2-260C-1 YEARViewView

    * The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

    If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

    Technical Documents

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    Datasheet

    Application Notes

    Simulation Models

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