General Description

The ICS874003-05 is a high performance Differential-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 ICS874003-05 has a bandwidth of 6.2MHz

with <1dB peaking, easily meeting PCI Express Gen2 PLL

requirements.

The ICS874003-05 uses IDT’s 3rd Generation FemtoClock™ 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.

Features

• Three differential LVDS output pairs

• One differential clock input

• CLK/nCLK can accept the following differential input levels:

LVPECL, LVDS, LVHSTL, HCSL, SSTL

• Input frequency range: 98MHz to 128MHz

• Output frequency range: 98MHz to 320MHz

• VCO range: 490MHz - 640MHz

• Supports PCI-Express Spread-Spectrum Clocking

• High PLL bandwidth allows for better input tracking

• PCI Express (2.5 Gb/s) and Gen 2 (5 Gb/S) jitter compliant

• 0°C to 70°C ambient operating temperature

• Full 3.3V operating supply

• Available in lead-free (RoHS 6) packages