General Description

The SM802101 is a member of the ClockWorks™ family of devices from Micrel and provides an extremely low-noise timing solution for PCI-Express clock signals. It is based upon a unique patented RotaryWave® architecture that provides very-low phase noise.

The device operates from a 3.3V or 2.5V power supply and synthesizes eight HCSL output clocks at 100MHz or 200MHz. The SM802101 accepts a 25MHz crystal or LVCMOS reference clock.

Features

• Generates eight HCSL clock outputs at 100MHz or 200MHz

• 2.5V or 3.3V operating range

• Typical phase jitter @ 100MHz (1.875MHz to 20MHz): 105fs

• Industrial temperature range (–40°C to +85°C)

• Green, RoHS, and PFOS compliant

• Available in 44-pin 7mm × 7mm QFN package

Applications

• PCI-Express