描述 Description

The 9DB233 zero-delay buffer supports PCIe Gen3

requirements, while being backwards compatible to PCIe

Gen2 and Gen1. The 9DB233 is driven by a differential

SRC output pair from an IDT 932S421 or 932SQ420 or

equivalent main clock generator. It attenuates jitter on the

input clock and has a selectable PLL bandwidth to

maximize performance in systems with or without

Spread-Spectrum clocking. An SMBus interface allows

control of the PLL bandwidth and bypass options, while 2

clock request (OE#) pins make the 9DB233 suitable for

Express Card applications.

Features/Benefits

? OE# pins; suitable for Express Card applications

? PLL or bypass mode; PLL can dejitter incoming clock

? Selectable PLL bandwidth; minimizes jitter peaking in

downstream PLL's

? Spread Spectrum Compatible; tracks spreading input

clock for low EMI

? SMBus Interface; allows control of PLL BW and Mode