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General Description

The ICS9DB823B is compatible with the Intel DB800Q

Differential Buffer Specification. This buffer provides 8

PCI-Express SRC or 8 QPI clocks. The ICS9DB823B is

driven by a differential output pair from a CK410B+ or

CK509B main clock generator.

Recommended Application

DB800Q compatible part with PCIe Gen1, Gen 2 and QPI

support

Output Features

? 8 - 0.7V current-mode differential output pairs

? Supports zero delay buffer mode and fanout mode

? Bandwidth programming available

? 50-133 MHz operation in PLL mode

? 33-400 MHz operation in Bypass mode

Features/Benefits

? Spread spectrum modulation tolerant, 0 to -0.5 down

spread and +/- 0.25 center spread

? Supports undriven differential outputs in Power Down

and DIF_STOP# modes for power management.

Key Specifications

? Outputs cycle-cycle jitter < 50ps

? Output to Output skew <50ps

? Phase jitter: PCIe Gen1 < 86ps peak to peak

? Phase jitter: PCIe Gen2 < 3.0/3.1ps rms

? Phase jitter: QPI < 0.5ps rms