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9ZX21901B Datasheet(PDF) 1 Page - Integrated Device Technology |
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9ZX21901B Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 18 page 9ZX21901B IDT® 19-Output Differential Zbuffer for PCIe Gen2/3 and QPI 1586P - 11/19/15 19-Output Differential Zbuffer for PCIe Gen2/3 and QPI 1 Description The 9ZX21901 is a version of the Intel DB1900Z Differential Buffer with an ajdustable external feedback path allowing the user to eliminate trace delays from their design. It is suitable for PCIe Gen3 or QPI applications. The part is backwards compatible to PCIe Gen1 and Gen2. The device maintains low drift for critical QPI applications. In bypass mode, the IDT9ZX21901 can provide outputs up to 400MHz. Key Specifications • Cycle-to-cycle jitter: < 50ps • Output-to-output skew: <65ps • Input-to-output delay: User adjustable • Input-to-output delay variation: <50ps • Phase jitter: PCIe Gen3 < 1ps rms • Phase jitter: QPI 9.6GB/s < 0.2ps rms Features/Benefits • External feedback path; Adjustable input-to-output delay • 9 Selectable SMBus addresses/ Multiple devices can share same SMBus segment • 8 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 Functional Block Diagram DATASHEET Logic DIF_IN DIF_IN# DIF(18:0) HIBW_BYPM_LOBW# SMBDAT SMBCLK CKPWRGD/PD# IREF OE(5_12)# 8 SMB_A0_tri SMB_A1_tri 100M_133M# Z-PLL (SS Compatible) DFB_OUT DFB_IN DFB_IN# Recommended Application 19 output PCIe Gen3/QPI buffer with adjustable feedback for Romley platforms Output Features • 19 - 0.7V current mode differential HCSL output pairs |
Similar Part No. - 9ZX21901B_15 |
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Similar Description - 9ZX21901B_15 |
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