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General description

The PCK953 is a 3.3 V compatible, PLL-based clock driver device targeted for high performance clock tree designs. With output frequencies of up to 125 MHz, and output skews of 100 ps, the PCK953 is ideal for the most demanding clock tree designs. The devices employ a fully differential PLL design to minimize cycle-to-cycle and phase jitter.

The PCK953 has a differential LVPECL reference input, along with an external feedback input. These features make the PCK953 ideal for use as a zero delay, low skew fanout buffer. The device performance has been tuned and optimized for zero delay performance. The MR/OE input pin will reset the internal counters and 3-State the output buffers when driven HIGH.

The PCK953 is fully 3.3 V compatible and requires no external loop filter components. All control inputs accept LVCMOS or LVTTL compatible levels, while the outputs provide LVCMOS levels with the ability to drive terminated 50 Ohm transmission lines. For series terminated 50 Ohm lines, each of the PCK953 outputs can drive two traces, giving the device an effective fanout of 1:18. The device is packaged in a 7 ? 7 mm 32-lead LQFP package to provide the optimum combination of board density and performance.

Features

  • Fully integrated PLL
  • Output frequency up to 125 MHz in PLL mode
  • Outputs disable in high impedance
  • LQFP32 packaging
  • 55 ps cycle-to-cycle jitter typical
  • 9 mA quiescent current, ICCA , typical
  • 60 ps static phase offset typical
  • Less than 10 uA quiescent current, lCCO , typical

Products/packages

Type numberNorth American Type numberOrdering code (12NC)Product statusPackagePackingMarkingChemical contentLeadfree conversion date
PCK953BDPCK953BD-T9352 679 41118Volume productionSOT358-1
(LQFP32)
Reel Pack, SMD, 13"Standard MarkingPCK953BD
PCK953BDPCK953BD-F9352 679 41128Volume productionSOT358-1
(LQFP32)
Reel Pack, SMD, 13", TurnedStandard MarkingPCK953BD
PCK953BD9352 679 41151Volume productionSOT358-1
(LQFP32)
Tray Pack, Bakeable, SingleStandard MarkingPCK953BD
PCK953BDPCK953BD9352 679 41157Volume productionSOT358-1
(LQFP32)
Tray Pack, Bakeable, MultipleStandard MarkingPCK953BD
PCK953BD/GPCK953BD/G-F9352 761 22128Volume productionSOT358-1
(LQFP32)
Reel Pack, SMD, 13", TurnedStandard MarkingPCK953BD/G
Always Pb-free

Pricing/ordering/availability

Type numberOrdering code(12NC)Indicative price/unit($)RegionDistributorIn stockInventory dateBuy onlineSamples
PCK953BD9352 679  41118  3.1200      Order samples
PCK953BD9352 679  41128  3.3200     not available
PCK953BD9352 679  41151        Order samples
PCK953BD9352 679  41157  3.3200     not available
PCK953BD/G9352 761  22128        Order samples

Block diagrams/pinning

Technical documents

Support Documents

75014354; Memory interface selection guide Support logic for memory modules and other memory subsystems (2005-06-01)

Parametrics/similar products

Type numberPackageSupply
voltage(V)
ApplicationOther
features
Operating
temp.(Cel)
InputsOutputsOutput frequency range(MHz)Jitter (pk-pk)(ps)Output skew(ps)ProgrammabilityPhase offset(ps)
PCK953BDSOT358-1
(LQFP32)
3.3 High-performance clock tree design, NG-DIMMs output disable, bypass, 1:18 effective fan-out 0~+70 1 x Differential PECL 9 x LVCMOS 50~125 55 100 Pin select 60

Similar products

PCK953 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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