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
Gen1/2/3 or QPI/UPI applications, and uses a fixed external
feedback to maintain low drift for demanding QPI/UPI
applications.
Recommended Application
Buffer for Romley, Grantley and Purley Servers
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/UPI 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/UPI
support
• Differential outputs are Low/Low in power down;
Maximum power savings
Output Features
• 19 - LP-HCSL Differential Output Pairs