Description

The 9SQ445 is a single-chip, PCIe Gen6 clock synthesizer

providing a subset of the 9SQ440 outputs. It is designed to work

as a complete clock solution or in combination with

DB2000Q-compliant clock buffers to provide point-to-point clocks

to multiple receiving agents. It is part of the next generation clock

generator family supporting the latest dual and multi-socket Intel

server platforms.

PCIe Clocking Architectures

▪ Common Clocked (CC)

▪ Independent Reference (IR) with and without spread spectrum

Typical Applications

▪ CK440Q Lite

Key Specifications

▪ PCIe Gen6 CC Phase Jitter < 40fs rms

Features

▪ 3.3V operation

▪ Side-Band Interface allows real-time hardware control of all

output enables

▪ OE# pin control of 100M outputs

▪ 85Ω differential Low-Power HCSL (LP-HCSL) outputs eliminate

24 resistors, saving 39mm2 of area

▪ Differential outputs drive both source terminated and double

(receiver) terminated loads

▪ 3 selectable SMBus addresses

▪ Supports 0, -0.3 and -0.5 spread-spectrum amounts

▪ Packaged in 5 × 5 mm 40-VFQFPN

Output Features

▪ Three 25MHz output pairs (1 × 25MHz and 2 × MXCLK set to

25MHz)

▪ Three 100MHz output pairs with individual OE# pins