General Description
The 9ZXL1230 is a small-footprint, low power 12-output
differential buffer that meets all the performance
requirements of the Intel DB1900Z specification. It is pin
compatible to the 9ZX21200. The 9ZXL1230 is backwards
compatible to PCIe Gen2 and QPI 6.4GT/s specifications. A
fixed, internal feedback path maintains low drift for critical
QPI applications.
Recommended Application
12-output Low Power PCIe Gen3/QPI differential buffer for
Romley
Output Features
• 12 - 0.7V low-power HCSL-compatible output pairs
Features/Benefits
• Low-power push-pull outputs; Save power and board
space - no Rp
• Pin compatible to 9ZX21200; easy path to >50% power
savings
• Space-saving 56-pin QFN package
• Fixed feedback path for 0ps input-to-output delay
• 9 Selectable SMBus Addresses; Mulitple devices can
share the same SMBus Segment
• 4 OE# pins; Hardware control of four outputs, other
outputs free run
• PLL or bypass mode; PLL can dejitter incoming clock
• 100MHz or 133MHz PLL mode operation; supports PCIe
and QPI applications
• Selectable PLL bandwidth; minimizes jitter peaking in
downstream PLL's
• Spread Spectrum Compatible; tracks spreading input
clock for low EMI
Key Specifications
• Cycle-to-cycle jitter <50ps
• Output-to-output skew <65 ps
• Input-to-output delay variation <50ps
• PCIe Gen3 phase jitter <1.0ps RMS
• QPI 9.6GT/s 12UI phase jitter <0.2ps RMS