Overview

The 9DB1933 zero-delay buffer supports PCIe Gen3 requirements, while being backwards compatible to PCIe Gen2 and Gen1. The 9DB1933 is driven by a differential SRC output pair from an IDT 932S421, 932SQ420, or equivalent, main clock generator. It attenuates jitter on the input clock and has a selectable PLL bandwidth to maximize performance in systems with or without Spread-Spectrum clocking.

9DB1933 - Block Diagram
9DB1933 - Pinout
9DB1933 - Block Diagram
9DB1933 - Pinout
  • 19 - 0.7 V current mode differential HCSL output pairs
  • 8 Selectable SMBus Addresses/Multiple devices can share the same SMBus Segment
  • 11 dedicated and 3 group OE# pins/Hardware control of the outputs
  • PLL or bypass mode/PLL can dejitter incoming clock
  • Selectable PLL bandwidth/minimizes jitter peaking in downstream PLL's
  • Spread spectrum compatible, tracks spreading input clock for low EMI
  • SMBus Interface, unused outputs can be disabled
  • Supports undriven differential outputs in Power Down mode for power management
  • Cycle-to-cycle jitter <50 ps
  • Output-to-output skew < 150 ps
  • PCIe Gen3 phase jitter < 1.0 ps RMS

Documentation

Design & Development

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
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    Buy / Sample
    Part Number
    9DB1933AKLF
    circleObsolete
    memory
    view_in_ar
    		VFQFPN 72 C Yes Tray
    9DB1933AKLFT
    circleObsolete
    memory
    view_in_ar
    		VFQFPN 72 C Yes Reel
    Parametric Table tips

    Tips for Using This Parametric Table:

    • Hide Filters button in header: Collapse or expands filters
    • Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
    • Reset button in header: Reset all filters to the page default
    • Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
    • Export button in header: Export the filtered results of the table to an Excel document
    • Filter parts search bar in header: Type to filter table results by part number
    • Hide column button in column headers: Select to hide columns in table
    • AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
    • Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
    • Document icon next to product name in row: View the featured document for this product
    • Chip icon next to the right of the document icon in row: View the block diagram for this product
    • Cart icon to the right of the chip icon: Indicates that samples are available for this product