9ZXL1930 Datasheet, PDF (1/18 Pages) Integrated Device Technology – Fixed feedback path

DATASHEET
19-OUTPUT LOW POWER DIFFERENTIAL ZBUFFER FOR PCIE GEN3 AND QPI _9ZXL1930
Description
The 9ZXL1930 is a low power version of the Intel DB1900Z
Differential Buffer utilizing Low-Power HCSL (LP-HCSL)
outputs to reduce power consumption more than 50% from
the original IDT9ZX21901. It is suitable for PCI-Express
Gen3 or QPI applications, and uses a fixed external
feedback to maintain low drift for demanding QPI
applications. The part is backwards compatible to PCIe
Gen1 and Gen2.
Recommended Application
19-output Low Power Differential ZBuffer for PCIe Gen3
and QPI
Key Specifications
• Cycle-to-cycle jitter: < 50ps
• Output-to-output skew: <85ps
• Input-to-output delay: Fixed at 0 ps
• Input-to-output delay variation: <50ps
• Phase jitter: PCIe Gen3 < 1ps rms
• Phase jitter: QPI 9.6GB/s < 0.2ps rms
Features/Benefits
• Fixed feedback path; 0ps input-to-output delay
• 9 Selectable SMBus addresses; Multiple devices can
share same SMBus segment
• Separate VDDIO for outputs; allows maximum power
savings
• 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
• Differential outputs are Low/Low in power down;
Maximum power savings
Output Features
• 19 - LP-HCSL Differential Output Pairs
Block Diagram
DIF_IN
DIF_IN#
HIBW_BYPM_LOBW#
100M_133M#
CKPWRGD/PD#
SMB_A0_tri
SMB_A1_tri
SMBDAT
SMBCLK
Logic
Z-PLL
(SS Compatible)
IDT® 19-OUTPUT LOW POWER DIFFERENTIAL ZBUFFER FOR PCIE GEN3 AND QPI
1
FBOUT_NC
DIF18
DIF0
9ZXL1930
REV C 062614