GENERAL DESCRIPTION

The 874003DI-02 is a high performance Dif-ferential-to-LVDS

Jitter Attenuator designed for use in PCI Express™ systems. In

some PCI Express systems, such as those found in desktop PCs,

the PCI Express clocks are generated from a low bandwidth, high

phase noise PLL frequency synthesizer. In these systems, a jitter

attenuator may be required to attenuate high frequency random

and deterministic jitter components from the PLL synthesizer and

from the system board. The 874003DI-02 has a bandwidth of 3MHz.

The 3MHz provides an intermediate bandwidth that can easily track

triangular spread profi les, while providing good jitter attenuation.

The 874003DI-02 uses IDT’s 3rd Generation FemtoClockTM

PLL technology to achieve the lowest possible phase noise.

The device is packaged in a 20 Lead TSSOP package, making it

ideal for use in space constrained applications such as PCI Express

add-in cards.

• Three differential LVDS output pairs

• One differential clock input

• CLK and nCLK supports the following input types:

LVPECL, LVDS, LVHSTL, SSTL, HCSL

• Output frequency range: 98MHz - 320MHz

• Input frequency range: 98MHz - 128MHz

• VCO range: 490MHz - 640MHz

• Cycle-to-cycle jitter: 30ps (maximum)

• Supports PCI-Express Spread-Spectrum Clocking

• 3MHz PLL loop bandwidth

• 3.3V operating supply

• -40°C to 85°C ambient operating temperature

• Available in lead-free (RoHS 6) package