GENERAL DESCRIPTION

The ICS8431-11 is a general purpose clock frequency synthesizer for IA64/32 application and a member of the HiPerClockS™ family of High Performance Clock Solutions from ICS. The VCO operates at a frequency range of 190MHz to 510MHz providing an output frequency range of 95MHz to 255MHz. The output frequency can be programmed using the parallel interface, M0 thru M8, to the configuration logic. Spread spectrum clocking is programmed via the control inputs SSC_CTL0 and SSC_CTL1.

FEATURES

• Fully integrated PLL

• Differential 3.3V LVPECL output

• Programmable PLL loop divider for generating a variety of output frequencies.

• Crystal oscillator interface

• Spread Spectrum Clocking (SSC) fixed at 1/2 modulation for environments requiring ultra low EMI

• Typical RMS cycle-to-cycle jitter 2.6 ps

• LVTTL / LVCMOS control inputs

• PLL bypass modes supporting in-circuit testing and on-chip functional block characterization

• 3.3V supply voltage

• 28 lead SOIC

• 0°C to 85°C ambient operating temperature