9ZX21501B

Datasheet 15-Output Differential Zbuffer for PCIe Gen2/3 and QPI Description The ICS9ZX21501 is a 15 output version of the Intel DB1900Z Differential Buffer suitable for PCIe Gen3 or QPI applications. The part is backwards compatible to PCIe Gen1 and Gen2. An adjustable external feedback path allows the user to eliminate trace delays from their design while maintaining low drift for critical QPI applications. In bypass mode, the ICS9ZX21501 can provide outputs up to 400MHz. 9 ZX21501B Features/Benefits • • • • • • • • • External feedback path/ Adjustable input-to-output delay 9 Selectable SMBus addresses/ Multiple devices can share same SMBus segment 7 dedicated OE# pins/ hardware control of outputs PLL or bypass mode/ PLL can dejitter incoming clock Selectable PLL BW/ minimizes jitter peaking in downstream PLL's Spread spectrum compatible/tracks spreading input clock for EMI reduction SMBus Interface/ unused outputs can be disabled 100MHz & 133.33MHz PLL mode/ Legacy QPI support Undriven differential outputs in Power Down mode for maximum power savings Recommended Application 15 output PCIe Gen3/QPI buffer with adjustable feedback for Romley platforms Output Features • 15 - 0.7V current mode differential HSCL output pairs Key Specifications • • • • • • Cycle-to-cycle jitter: < 50ps Output-to-output skew: