GENERAL DESCRIPTION

The ICS84327 is a Crystal-to-3.3V LVPECL Clock Synthesizer/Fanout Buffer designed for SONET, 10 Gigabit Fibre Channel and 10 Gigabit Ethernet applications and is a member of the HiperClockS family of High Performance Clock Solutions from ICS. The output frequency can be set using the frequency select pins and a 19.44MHz crystal for SONET frequencies, or a 25MHz crystal for 10 Gigabit Ethernet frequencies, or a 25.5MHz crystal for a 10 Gigabit Fibre Channel. The low phase noise characteristics of the ICS84327 make it an ideal clock for these demanding applications.

FEATURES

? 6 LVPECL outputs

? Crystal oscillator interface

? Output frequency range: 77.76MHz to 625MHz

? Crystal input frequency: 19.44MHz, 25MHz or 25.5MHz

? RMS phase jitter at 155.52MHz, using a 19.44MHz crystal (12KHz to 20MHz): 3.4ps (typical)

Phase noise:

Offset Noise Power

100Hz .................. -92 dBc/Hz

1KHz ................ -105 dBc/Hz

10KHz ................ -122 dBc/Hz

100KHz ................ -123 dBc/Hz

? Full 3.3V or 3.3V core, 2.5V output supply mode

? 0°C to 70°C ambient operating temperature

? Industrial temperature information available upon request