9ZX21501B Datasheet, PDF (1/16 Pages) Integrated Device Technology – 15-Output Differential Zbuffer for PCIe Gen2/3 and QPI

Datasheet
15-Output Differential Zbuffer for PCIe Gen2/3 and QPI
9ZX21501B
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.
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
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
Key Specifications
Functional Block Diagram
• 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
OE(5_8,10_12)#
7
DIF_IN
DIF_IN#
DFB_IN
DFB_IN#
HIBW_BYPM_LOBW#
100M_133M#
CKPWRGD/PD#
SMB_A0_tri
SMB_A1_tri
SMBDAT
SMBCLK
Logic
Z-PLL
(SS Compatible)
DFB_OUT
DIF(17:15, 13:10, 8:4, 2:0)
IREF
IDT^® 15-Output Differential Zbuffer for PCIe Gen2/3 and QPI
1
1629C - 12/15/11