The 9ZX21200 is a small-footprint 12-output differential buffer that meets all the performance requirements of the Intel DB1200Z specification. The 9ZX21200 is backwards compatible to PCIe Gen1 and Gen2 applications. A fixed, internal feedback path maintains low drift for critical QPI applications. In bypass mode, the 9ZX21200 can provide outputs up to 150MHz.


  • 12 - 0.7V HCSL differential output pairs
  • Phase jitter: PCIe Gen3 < 1ps rms
  • Phase jitter: PCIe Gen2 < 3.1ps rms
  • Phase jitter: PCIe Gen1 < 86ps peak to peak
  • Phase jitter: QPI 9.6GT/s < 0.2ps rmsSupports zero delay buffer mode and fanout mode
  • Bandwidth programming available
  • 9 selectable SMBus Addresses
  • 4 OE# pins90-147 MHz operation in PLL mode
  • 33-150 MHz operation in Bypass mode

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 56 C Yes Tray
Active VFQFPN 56 C Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
9ZX21200 Datasheet Datasheet PDF 8.97 MB
Application Notes & White Papers
AN-975 Cascading PLLs Application Note PDF 255 KB
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-808 PCI Express/HCSL Termination Application Note PDF 137 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PDN# : CQ-17-04(R1) Product Discontinuance Notice Product Discontinuation Notice PDF 606 KB
PDN# : CQ-17-04 Product Discontinuance Notice Product Discontinuation Notice PDF 599 KB
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB
PCN#: A1309-03 Additional Assembly Sources Product Change Notice PDF 398 KB
PCN# : A1305-01 Gold Wire to Copper Wire Product Change Notice PDF 148 KB
9ZX21200B IBIS Model Model - IBIS ZIP 12 KB
9ZX21200A IBIS Model Model - IBIS ZIP 11 KB
Clock Distribution Overview 日本語 Overview PDF 217 KB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB
9ZX21200 Block Diagram Block Diagram PNG 22 KB