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9ZX21901B Datasheet(PDF) 1 Page - Integrated Device Technology

Part # 9ZX21901B
Description  19-Output Differential Zbuffer for PCIe Gen2/3 and QPI
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Manufacturer  IDT [Integrated Device Technology]
Direct Link  http://www.idt.com
Logo IDT - Integrated Device Technology

9ZX21901B Datasheet(HTML) 1 Page - Integrated Device Technology

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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


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